./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/relax-2-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version d790fecc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/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_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-examples/relax-2-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/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_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/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 56e9aa9f750ced23bf75100b2ff89e86c96f8abe4883dfab569153879bc59aef --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-28 05:18:52,598 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-28 05:18:52,690 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-28 05:18:52,700 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-28 05:18:52,700 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-28 05:18:52,743 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-28 05:18:52,744 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-28 05:18:52,744 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-28 05:18:52,745 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-28 05:18:52,745 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-28 05:18:52,745 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-28 05:18:52,745 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-28 05:18:52,745 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-28 05:18:52,745 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-28 05:18:52,746 INFO L153 SettingsManager]: * Use SBE=true [2024-11-28 05:18:52,746 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-28 05:18:52,746 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-28 05:18:52,746 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-28 05:18:52,746 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-28 05:18:52,746 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-28 05:18:52,747 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-28 05:18:52,747 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-28 05:18:52,747 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-28 05:18:52,747 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-28 05:18:52,747 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-28 05:18:52,747 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-28 05:18:52,747 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-28 05:18:52,748 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-28 05:18:52,748 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-28 05:18:52,748 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 05:18:52,748 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 05:18:52,748 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 05:18:52,748 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 05:18:52,748 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-28 05:18:52,749 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 05:18:52,749 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 05:18:52,749 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 05:18:52,749 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 05:18:52,749 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-28 05:18:52,749 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-28 05:18:52,749 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-28 05:18:52,749 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-28 05:18:52,749 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-28 05:18:52,750 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-28 05:18:52,750 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-28 05:18:52,750 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-28 05:18:52,750 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-28 05:18:52,750 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-28 05:18:52,750 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_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/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 -> 56e9aa9f750ced23bf75100b2ff89e86c96f8abe4883dfab569153879bc59aef [2024-11-28 05:18:53,108 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-28 05:18:53,123 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-28 05:18:53,127 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-28 05:18:53,129 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-28 05:18:53,129 INFO L274 PluginConnector]: CDTParser initialized [2024-11-28 05:18:53,131 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/array-examples/relax-2-2.i [2024-11-28 05:18:56,295 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/data/4b583ecfa/935dbbbe227644a49bb3c967344181e8/FLAG9762be521 [2024-11-28 05:18:56,669 INFO L384 CDTParser]: Found 1 translation units. [2024-11-28 05:18:56,670 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/sv-benchmarks/c/array-examples/relax-2-2.i [2024-11-28 05:18:56,683 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/data/4b583ecfa/935dbbbe227644a49bb3c967344181e8/FLAG9762be521 [2024-11-28 05:18:56,874 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/data/4b583ecfa/935dbbbe227644a49bb3c967344181e8 [2024-11-28 05:18:56,877 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-28 05:18:56,878 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-28 05:18:56,879 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-28 05:18:56,879 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-28 05:18:56,884 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-28 05:18:56,885 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 05:18:56" (1/1) ... [2024-11-28 05:18:56,886 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2499aaf3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:18:56, skipping insertion in model container [2024-11-28 05:18:56,886 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 05:18:56" (1/1) ... [2024-11-28 05:18:56,921 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-28 05:18:57,126 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_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/sv-benchmarks/c/array-examples/relax-2-2.i[982,995] [2024-11-28 05:18:57,306 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 05:18:57,316 INFO L200 MainTranslator]: Completed pre-run [2024-11-28 05:18:57,327 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_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/sv-benchmarks/c/array-examples/relax-2-2.i[982,995] [2024-11-28 05:18:57,370 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 05:18:57,402 INFO L204 MainTranslator]: Completed translation [2024-11-28 05:18:57,403 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:18:57 WrapperNode [2024-11-28 05:18:57,404 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-28 05:18:57,405 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-28 05:18:57,405 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-28 05:18:57,405 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-28 05:18:57,415 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:18:57" (1/1) ... [2024-11-28 05:18:57,436 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:18:57" (1/1) ... [2024-11-28 05:18:57,475 INFO L138 Inliner]: procedures = 120, calls = 28, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 135 [2024-11-28 05:18:57,478 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-28 05:18:57,479 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-28 05:18:57,479 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-28 05:18:57,479 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-28 05:18:57,487 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:18:57" (1/1) ... [2024-11-28 05:18:57,488 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:18:57" (1/1) ... [2024-11-28 05:18:57,491 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:18:57" (1/1) ... [2024-11-28 05:18:57,505 INFO L175 MemorySlicer]: Split 14 memory accesses to 3 slices as follows [2, 6, 6]. 43 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 2 writes are split as follows [0, 1, 1]. [2024-11-28 05:18:57,506 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:18:57" (1/1) ... [2024-11-28 05:18:57,506 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:18:57" (1/1) ... [2024-11-28 05:18:57,513 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:18:57" (1/1) ... [2024-11-28 05:18:57,514 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:18:57" (1/1) ... [2024-11-28 05:18:57,518 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:18:57" (1/1) ... [2024-11-28 05:18:57,520 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:18:57" (1/1) ... [2024-11-28 05:18:57,521 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:18:57" (1/1) ... [2024-11-28 05:18:57,524 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-28 05:18:57,524 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-28 05:18:57,525 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-28 05:18:57,525 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-28 05:18:57,526 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:18:57" (1/1) ... [2024-11-28 05:18:57,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 05:18:57,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:18:57,559 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-28 05:18:57,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-28 05:18:57,586 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-28 05:18:57,586 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-28 05:18:57,586 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-28 05:18:57,586 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-28 05:18:57,587 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-28 05:18:57,587 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-28 05:18:57,587 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-28 05:18:57,587 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-28 05:18:57,587 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-28 05:18:57,587 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-28 05:18:57,587 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-28 05:18:57,587 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-28 05:18:57,587 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-28 05:18:57,587 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-28 05:18:57,587 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-28 05:18:57,587 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-28 05:18:57,588 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-28 05:18:57,721 INFO L234 CfgBuilder]: Building ICFG [2024-11-28 05:18:57,723 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-28 05:18:58,059 INFO L? ?]: Removed 36 outVars from TransFormulas that were not future-live. [2024-11-28 05:18:58,059 INFO L283 CfgBuilder]: Performing block encoding [2024-11-28 05:18:58,076 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-28 05:18:58,078 INFO L312 CfgBuilder]: Removed 5 assume(true) statements. [2024-11-28 05:18:58,078 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 05:18:58 BoogieIcfgContainer [2024-11-28 05:18:58,078 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-28 05:18:58,081 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-28 05:18:58,081 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-28 05:18:58,087 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-28 05:18:58,087 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 05:18:56" (1/3) ... [2024-11-28 05:18:58,088 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34384cff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 05:18:58, skipping insertion in model container [2024-11-28 05:18:58,088 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:18:57" (2/3) ... [2024-11-28 05:18:58,089 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34384cff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 05:18:58, skipping insertion in model container [2024-11-28 05:18:58,090 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 05:18:58" (3/3) ... [2024-11-28 05:18:58,091 INFO L128 eAbstractionObserver]: Analyzing ICFG relax-2-2.i [2024-11-28 05:18:58,114 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-28 05:18:58,115 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG relax-2-2.i that has 3 procedures, 57 locations, 1 initial locations, 5 loop locations, and 1 error locations. [2024-11-28 05:18:58,186 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-28 05:18:58,206 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;@37215bc2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-28 05:18:58,206 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-28 05:18:58,212 INFO L276 IsEmpty]: Start isEmpty. Operand has 57 states, 46 states have (on average 1.5434782608695652) internal successors, (71), 50 states have internal predecessors, (71), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-28 05:18:58,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-28 05:18:58,218 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:18:58,219 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:18:58,219 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:18:58,225 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:18:58,225 INFO L85 PathProgramCache]: Analyzing trace with hash 475881552, now seen corresponding path program 1 times [2024-11-28 05:18:58,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:18:58,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254384634] [2024-11-28 05:18:58,237 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:18:58,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:18:58,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:18:58,403 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 05:18:58,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:18:58,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254384634] [2024-11-28 05:18:58,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254384634] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:18:58,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185977548] [2024-11-28 05:18:58,405 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:18:58,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:18:58,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:18:58,410 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:18:58,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-28 05:18:58,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:18:58,514 INFO L256 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 1 conjuncts are in the unsatisfiable core [2024-11-28 05:18:58,518 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:18:58,529 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 05:18:58,529 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 05:18:58,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185977548] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:18:58,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-28 05:18:58,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2024-11-28 05:18:58,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630720300] [2024-11-28 05:18:58,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:18:58,536 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-28 05:18:58,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:18:58,557 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-28 05:18:58,557 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-28 05:18:58,560 INFO L87 Difference]: Start difference. First operand has 57 states, 46 states have (on average 1.5434782608695652) internal successors, (71), 50 states have internal predecessors, (71), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 05:18:58,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:18:58,583 INFO L93 Difference]: Finished difference Result 111 states and 173 transitions. [2024-11-28 05:18:58,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-28 05:18:58,586 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 24 [2024-11-28 05:18:58,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:18:58,594 INFO L225 Difference]: With dead ends: 111 [2024-11-28 05:18:58,594 INFO L226 Difference]: Without dead ends: 51 [2024-11-28 05:18:58,598 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-28 05:18:58,601 INFO L435 NwaCegarLoop]: 78 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 05:18:58,602 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 05:18:58,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-11-28 05:18:58,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2024-11-28 05:18:58,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 41 states have (on average 1.3902439024390243) internal successors, (57), 45 states have internal predecessors, (57), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-28 05:18:58,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 70 transitions. [2024-11-28 05:18:58,642 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 70 transitions. Word has length 24 [2024-11-28 05:18:58,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:18:58,643 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 70 transitions. [2024-11-28 05:18:58,643 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 05:18:58,643 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 70 transitions. [2024-11-28 05:18:58,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-28 05:18:58,645 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:18:58,645 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:18:58,656 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-28 05:18:58,846 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2024-11-28 05:18:58,846 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:18:58,846 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:18:58,847 INFO L85 PathProgramCache]: Analyzing trace with hash -1621630576, now seen corresponding path program 1 times [2024-11-28 05:18:58,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:18:58,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982727850] [2024-11-28 05:18:58,847 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:18:58,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:18:58,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:18:59,242 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-28 05:18:59,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:18:59,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982727850] [2024-11-28 05:18:59,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982727850] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:18:59,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:18:59,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 05:18:59,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492495500] [2024-11-28 05:18:59,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:18:59,244 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 05:18:59,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:18:59,244 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 05:18:59,245 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 05:18:59,249 INFO L87 Difference]: Start difference. First operand 51 states and 70 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-28 05:18:59,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:18:59,290 INFO L93 Difference]: Finished difference Result 75 states and 101 transitions. [2024-11-28 05:18:59,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 05:18:59,291 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2024-11-28 05:18:59,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:18:59,292 INFO L225 Difference]: With dead ends: 75 [2024-11-28 05:18:59,292 INFO L226 Difference]: Without dead ends: 53 [2024-11-28 05:18:59,293 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 05:18:59,293 INFO L435 NwaCegarLoop]: 68 mSDtfsCounter, 0 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 05:18:59,294 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 197 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 05:18:59,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-11-28 05:18:59,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2024-11-28 05:18:59,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 43 states have (on average 1.372093023255814) internal successors, (59), 47 states have internal predecessors, (59), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-28 05:18:59,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 72 transitions. [2024-11-28 05:18:59,309 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 72 transitions. Word has length 24 [2024-11-28 05:18:59,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:18:59,310 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 72 transitions. [2024-11-28 05:18:59,310 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-28 05:18:59,310 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 72 transitions. [2024-11-28 05:18:59,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-28 05:18:59,311 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:18:59,311 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:18:59,311 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-28 05:18:59,311 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:18:59,315 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:18:59,315 INFO L85 PathProgramCache]: Analyzing trace with hash -1478150539, now seen corresponding path program 1 times [2024-11-28 05:18:59,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:18:59,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734676601] [2024-11-28 05:18:59,316 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:18:59,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:18:59,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:18:59,713 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-28 05:18:59,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:18:59,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734676601] [2024-11-28 05:18:59,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734676601] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:18:59,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:18:59,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-28 05:18:59,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945688821] [2024-11-28 05:18:59,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:18:59,714 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 05:18:59,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:18:59,714 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 05:18:59,715 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-28 05:18:59,715 INFO L87 Difference]: Start difference. First operand 53 states and 72 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-28 05:18:59,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:18:59,885 INFO L93 Difference]: Finished difference Result 110 states and 148 transitions. [2024-11-28 05:18:59,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 05:18:59,886 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 27 [2024-11-28 05:18:59,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:18:59,887 INFO L225 Difference]: With dead ends: 110 [2024-11-28 05:18:59,887 INFO L226 Difference]: Without dead ends: 75 [2024-11-28 05:18:59,887 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-28 05:18:59,888 INFO L435 NwaCegarLoop]: 59 mSDtfsCounter, 22 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 05:18:59,889 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 284 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 05:18:59,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2024-11-28 05:18:59,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 72. [2024-11-28 05:18:59,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 62 states have (on average 1.3709677419354838) internal successors, (85), 66 states have internal predecessors, (85), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-28 05:18:59,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 98 transitions. [2024-11-28 05:18:59,897 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 98 transitions. Word has length 27 [2024-11-28 05:18:59,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:18:59,897 INFO L471 AbstractCegarLoop]: Abstraction has 72 states and 98 transitions. [2024-11-28 05:18:59,897 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-28 05:18:59,898 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 98 transitions. [2024-11-28 05:18:59,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-28 05:18:59,898 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:18:59,898 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:18:59,898 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-28 05:18:59,899 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:18:59,899 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:18:59,899 INFO L85 PathProgramCache]: Analyzing trace with hash -915852063, now seen corresponding path program 1 times [2024-11-28 05:18:59,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:18:59,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466209710] [2024-11-28 05:18:59,903 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:18:59,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:18:59,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:19:00,501 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-28 05:19:00,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:19:00,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466209710] [2024-11-28 05:19:00,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466209710] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:19:00,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:19:00,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-28 05:19:00,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777895361] [2024-11-28 05:19:00,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:19:00,503 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-28 05:19:00,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:19:00,504 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-28 05:19:00,505 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-28 05:19:00,506 INFO L87 Difference]: Start difference. First operand 72 states and 98 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-28 05:19:00,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:19:00,831 INFO L93 Difference]: Finished difference Result 113 states and 150 transitions. [2024-11-28 05:19:00,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-28 05:19:00,831 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 28 [2024-11-28 05:19:00,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:19:00,833 INFO L225 Difference]: With dead ends: 113 [2024-11-28 05:19:00,833 INFO L226 Difference]: Without dead ends: 100 [2024-11-28 05:19:00,833 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-11-28 05:19:00,834 INFO L435 NwaCegarLoop]: 81 mSDtfsCounter, 62 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 05:19:00,834 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 386 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-28 05:19:00,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2024-11-28 05:19:00,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 82. [2024-11-28 05:19:00,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 72 states have (on average 1.375) internal successors, (99), 76 states have internal predecessors, (99), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-28 05:19:00,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 112 transitions. [2024-11-28 05:19:00,847 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 112 transitions. Word has length 28 [2024-11-28 05:19:00,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:19:00,848 INFO L471 AbstractCegarLoop]: Abstraction has 82 states and 112 transitions. [2024-11-28 05:19:00,848 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-28 05:19:00,848 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 112 transitions. [2024-11-28 05:19:00,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-28 05:19:00,849 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:19:00,849 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:19:00,849 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-28 05:19:00,850 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:19:00,850 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:19:00,850 INFO L85 PathProgramCache]: Analyzing trace with hash -1831063463, now seen corresponding path program 1 times [2024-11-28 05:19:00,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:19:00,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581564869] [2024-11-28 05:19:00,850 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:19:00,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:19:00,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:19:01,448 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-28 05:19:01,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:19:01,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581564869] [2024-11-28 05:19:01,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581564869] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:19:01,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840930039] [2024-11-28 05:19:01,449 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:19:01,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:19:01,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:19:01,454 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:19:01,456 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-28 05:19:01,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:19:01,602 INFO L256 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-28 05:19:01,604 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:19:01,951 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-28 05:19:01,951 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:19:02,487 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-28 05:19:02,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840930039] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:19:02,488 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:19:02,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 21 [2024-11-28 05:19:02,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575604831] [2024-11-28 05:19:02,488 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:19:02,489 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-28 05:19:02,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:19:02,489 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-28 05:19:02,491 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2024-11-28 05:19:02,493 INFO L87 Difference]: Start difference. First operand 82 states and 112 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 19 states have internal predecessors, (41), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-28 05:19:03,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:19:03,256 INFO L93 Difference]: Finished difference Result 212 states and 301 transitions. [2024-11-28 05:19:03,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-28 05:19:03,258 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 19 states have internal predecessors, (41), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 29 [2024-11-28 05:19:03,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:19:03,260 INFO L225 Difference]: With dead ends: 212 [2024-11-28 05:19:03,260 INFO L226 Difference]: Without dead ends: 181 [2024-11-28 05:19:03,261 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=132, Invalid=570, Unknown=0, NotChecked=0, Total=702 [2024-11-28 05:19:03,262 INFO L435 NwaCegarLoop]: 106 mSDtfsCounter, 287 mSDsluCounter, 1105 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 1211 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-28 05:19:03,262 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [295 Valid, 1211 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 445 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-28 05:19:03,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2024-11-28 05:19:03,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 135. [2024-11-28 05:19:03,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 122 states have (on average 1.3934426229508197) internal successors, (170), 127 states have internal predecessors, (170), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-28 05:19:03,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 187 transitions. [2024-11-28 05:19:03,286 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 187 transitions. Word has length 29 [2024-11-28 05:19:03,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:19:03,287 INFO L471 AbstractCegarLoop]: Abstraction has 135 states and 187 transitions. [2024-11-28 05:19:03,287 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 19 states have internal predecessors, (41), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-28 05:19:03,287 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 187 transitions. [2024-11-28 05:19:03,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-28 05:19:03,288 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:19:03,289 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:19:03,302 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-28 05:19:03,493 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:19:03,493 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:19:03,494 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:19:03,494 INFO L85 PathProgramCache]: Analyzing trace with hash 1026902139, now seen corresponding path program 1 times [2024-11-28 05:19:03,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:19:03,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432921434] [2024-11-28 05:19:03,494 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:19:03,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:19:03,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:19:03,986 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-28 05:19:03,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:19:03,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432921434] [2024-11-28 05:19:03,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432921434] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:19:03,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974204623] [2024-11-28 05:19:03,986 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:19:03,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:19:03,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:19:03,989 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:19:03,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-28 05:19:04,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:19:04,103 INFO L256 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-28 05:19:04,106 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:19:04,290 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-28 05:19:04,290 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:19:04,518 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-28 05:19:04,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974204623] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-28 05:19:04,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-28 05:19:04,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 9] total 20 [2024-11-28 05:19:04,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272122514] [2024-11-28 05:19:04,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:19:04,519 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-28 05:19:04,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:19:04,520 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-28 05:19:04,520 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2024-11-28 05:19:04,520 INFO L87 Difference]: Start difference. First operand 135 states and 187 transitions. Second operand has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-28 05:19:04,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:19:04,697 INFO L93 Difference]: Finished difference Result 166 states and 220 transitions. [2024-11-28 05:19:04,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 05:19:04,698 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 30 [2024-11-28 05:19:04,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:19:04,699 INFO L225 Difference]: With dead ends: 166 [2024-11-28 05:19:04,699 INFO L226 Difference]: Without dead ends: 138 [2024-11-28 05:19:04,700 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2024-11-28 05:19:04,703 INFO L435 NwaCegarLoop]: 64 mSDtfsCounter, 10 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 05:19:04,703 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 394 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 05:19:04,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2024-11-28 05:19:04,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 135. [2024-11-28 05:19:04,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 122 states have (on average 1.3524590163934427) internal successors, (165), 127 states have internal predecessors, (165), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-28 05:19:04,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 182 transitions. [2024-11-28 05:19:04,734 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 182 transitions. Word has length 30 [2024-11-28 05:19:04,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:19:04,734 INFO L471 AbstractCegarLoop]: Abstraction has 135 states and 182 transitions. [2024-11-28 05:19:04,735 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-28 05:19:04,735 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 182 transitions. [2024-11-28 05:19:04,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-28 05:19:04,738 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:19:04,738 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:19:04,747 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-28 05:19:04,942 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-28 05:19:04,942 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:19:04,943 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:19:04,943 INFO L85 PathProgramCache]: Analyzing trace with hash -1677967043, now seen corresponding path program 2 times [2024-11-28 05:19:04,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:19:04,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527866367] [2024-11-28 05:19:04,943 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:19:04,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:19:04,997 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-28 05:19:05,002 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:19:05,507 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-28 05:19:05,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:19:05,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527866367] [2024-11-28 05:19:05,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527866367] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:19:05,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:19:05,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-11-28 05:19:05,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938866996] [2024-11-28 05:19:05,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:19:05,508 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-28 05:19:05,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:19:05,509 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-28 05:19:05,509 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-11-28 05:19:05,510 INFO L87 Difference]: Start difference. First operand 135 states and 182 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-28 05:19:05,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:19:05,953 INFO L93 Difference]: Finished difference Result 240 states and 325 transitions. [2024-11-28 05:19:05,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-28 05:19:05,954 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 31 [2024-11-28 05:19:05,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:19:05,956 INFO L225 Difference]: With dead ends: 240 [2024-11-28 05:19:05,957 INFO L226 Difference]: Without dead ends: 210 [2024-11-28 05:19:05,958 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2024-11-28 05:19:05,959 INFO L435 NwaCegarLoop]: 48 mSDtfsCounter, 174 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 05:19:05,961 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 302 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 05:19:05,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2024-11-28 05:19:05,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 153. [2024-11-28 05:19:05,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 139 states have (on average 1.3453237410071943) internal successors, (187), 144 states have internal predecessors, (187), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-28 05:19:05,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 204 transitions. [2024-11-28 05:19:05,999 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 204 transitions. Word has length 31 [2024-11-28 05:19:06,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:19:06,000 INFO L471 AbstractCegarLoop]: Abstraction has 153 states and 204 transitions. [2024-11-28 05:19:06,001 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-28 05:19:06,001 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 204 transitions. [2024-11-28 05:19:06,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-28 05:19:06,005 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:19:06,005 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:19:06,005 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-28 05:19:06,006 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:19:06,006 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:19:06,006 INFO L85 PathProgramCache]: Analyzing trace with hash 1875349318, now seen corresponding path program 1 times [2024-11-28 05:19:06,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:19:06,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271680895] [2024-11-28 05:19:06,006 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:19:06,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:19:06,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:19:06,092 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-28 05:19:06,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:19:06,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271680895] [2024-11-28 05:19:06,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271680895] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:19:06,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:19:06,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 05:19:06,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646444962] [2024-11-28 05:19:06,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:19:06,099 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 05:19:06,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:19:06,100 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 05:19:06,100 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 05:19:06,100 INFO L87 Difference]: Start difference. First operand 153 states and 204 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-28 05:19:06,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:19:06,141 INFO L93 Difference]: Finished difference Result 183 states and 236 transitions. [2024-11-28 05:19:06,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 05:19:06,142 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 31 [2024-11-28 05:19:06,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:19:06,143 INFO L225 Difference]: With dead ends: 183 [2024-11-28 05:19:06,143 INFO L226 Difference]: Without dead ends: 151 [2024-11-28 05:19:06,143 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 05:19:06,144 INFO L435 NwaCegarLoop]: 67 mSDtfsCounter, 0 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 05:19:06,144 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 195 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 05:19:06,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2024-11-28 05:19:06,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2024-11-28 05:19:06,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 137 states have (on average 1.2992700729927007) internal successors, (178), 142 states have internal predecessors, (178), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-28 05:19:06,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 195 transitions. [2024-11-28 05:19:06,174 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 195 transitions. Word has length 31 [2024-11-28 05:19:06,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:19:06,176 INFO L471 AbstractCegarLoop]: Abstraction has 151 states and 195 transitions. [2024-11-28 05:19:06,176 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-28 05:19:06,177 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 195 transitions. [2024-11-28 05:19:06,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-28 05:19:06,182 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:19:06,182 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:19:06,182 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-28 05:19:06,182 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:19:06,183 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:19:06,183 INFO L85 PathProgramCache]: Analyzing trace with hash 2128640524, now seen corresponding path program 1 times [2024-11-28 05:19:06,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:19:06,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957672447] [2024-11-28 05:19:06,183 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:19:06,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:19:06,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:19:06,222 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-28 05:19:06,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:19:06,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957672447] [2024-11-28 05:19:06,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957672447] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:19:06,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:19:06,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 05:19:06,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037242227] [2024-11-28 05:19:06,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:19:06,224 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 05:19:06,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:19:06,224 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 05:19:06,224 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 05:19:06,225 INFO L87 Difference]: Start difference. First operand 151 states and 195 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-28 05:19:06,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:19:06,271 INFO L93 Difference]: Finished difference Result 230 states and 299 transitions. [2024-11-28 05:19:06,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 05:19:06,272 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 32 [2024-11-28 05:19:06,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:19:06,273 INFO L225 Difference]: With dead ends: 230 [2024-11-28 05:19:06,273 INFO L226 Difference]: Without dead ends: 192 [2024-11-28 05:19:06,274 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 05:19:06,274 INFO L435 NwaCegarLoop]: 66 mSDtfsCounter, 4 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 05:19:06,274 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 127 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 05:19:06,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2024-11-28 05:19:06,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 192. [2024-11-28 05:19:06,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 178 states have (on average 1.2865168539325842) internal successors, (229), 183 states have internal predecessors, (229), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-28 05:19:06,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 246 transitions. [2024-11-28 05:19:06,301 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 246 transitions. Word has length 32 [2024-11-28 05:19:06,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:19:06,301 INFO L471 AbstractCegarLoop]: Abstraction has 192 states and 246 transitions. [2024-11-28 05:19:06,301 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-28 05:19:06,302 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 246 transitions. [2024-11-28 05:19:06,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-28 05:19:06,303 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:19:06,303 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:19:06,303 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-28 05:19:06,303 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:19:06,303 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:19:06,304 INFO L85 PathProgramCache]: Analyzing trace with hash -1677619310, now seen corresponding path program 1 times [2024-11-28 05:19:06,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:19:06,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315248661] [2024-11-28 05:19:06,304 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:19:06,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:19:06,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:19:06,529 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-28 05:19:06,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:19:06,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315248661] [2024-11-28 05:19:06,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315248661] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:19:06,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:19:06,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-28 05:19:06,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120472864] [2024-11-28 05:19:06,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:19:06,530 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 05:19:06,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:19:06,531 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 05:19:06,531 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-28 05:19:06,531 INFO L87 Difference]: Start difference. First operand 192 states and 246 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-28 05:19:06,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:19:06,638 INFO L93 Difference]: Finished difference Result 201 states and 254 transitions. [2024-11-28 05:19:06,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 05:19:06,639 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 37 [2024-11-28 05:19:06,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:19:06,640 INFO L225 Difference]: With dead ends: 201 [2024-11-28 05:19:06,642 INFO L226 Difference]: Without dead ends: 156 [2024-11-28 05:19:06,643 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-11-28 05:19:06,643 INFO L435 NwaCegarLoop]: 64 mSDtfsCounter, 5 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 05:19:06,643 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 229 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 05:19:06,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2024-11-28 05:19:06,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2024-11-28 05:19:06,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 142 states have (on average 1.2887323943661972) internal successors, (183), 147 states have internal predecessors, (183), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-28 05:19:06,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 200 transitions. [2024-11-28 05:19:06,665 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 200 transitions. Word has length 37 [2024-11-28 05:19:06,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:19:06,665 INFO L471 AbstractCegarLoop]: Abstraction has 156 states and 200 transitions. [2024-11-28 05:19:06,665 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-28 05:19:06,666 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 200 transitions. [2024-11-28 05:19:06,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-11-28 05:19:06,666 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:19:06,666 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:19:06,667 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-28 05:19:06,669 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:19:06,670 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:19:06,670 INFO L85 PathProgramCache]: Analyzing trace with hash -1688272104, now seen corresponding path program 1 times [2024-11-28 05:19:06,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:19:06,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183134331] [2024-11-28 05:19:06,670 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:19:06,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:19:06,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:19:06,964 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-28 05:19:06,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:19:06,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183134331] [2024-11-28 05:19:06,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183134331] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:19:06,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873340908] [2024-11-28 05:19:06,965 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:19:06,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:19:06,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:19:06,967 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:19:06,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-28 05:19:07,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:19:07,065 INFO L256 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-28 05:19:07,068 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:19:07,378 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-28 05:19:07,378 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:19:07,932 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-28 05:19:07,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873340908] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:19:07,933 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:19:07,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 13] total 27 [2024-11-28 05:19:07,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798335108] [2024-11-28 05:19:07,934 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:19:07,935 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-28 05:19:07,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:19:07,936 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-28 05:19:07,936 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=613, Unknown=0, NotChecked=0, Total=702 [2024-11-28 05:19:07,936 INFO L87 Difference]: Start difference. First operand 156 states and 200 transitions. Second operand has 27 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-28 05:19:08,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:19:08,736 INFO L93 Difference]: Finished difference Result 210 states and 269 transitions. [2024-11-28 05:19:08,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-28 05:19:08,737 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 38 [2024-11-28 05:19:08,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:19:08,738 INFO L225 Difference]: With dead ends: 210 [2024-11-28 05:19:08,738 INFO L226 Difference]: Without dead ends: 154 [2024-11-28 05:19:08,739 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=189, Invalid=1071, Unknown=0, NotChecked=0, Total=1260 [2024-11-28 05:19:08,740 INFO L435 NwaCegarLoop]: 54 mSDtfsCounter, 121 mSDsluCounter, 817 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 871 SdHoareTripleChecker+Invalid, 499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-28 05:19:08,740 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 871 Invalid, 499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 491 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-28 05:19:08,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2024-11-28 05:19:08,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 114. [2024-11-28 05:19:08,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 100 states have (on average 1.29) internal successors, (129), 105 states have internal predecessors, (129), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-28 05:19:08,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 146 transitions. [2024-11-28 05:19:08,763 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 146 transitions. Word has length 38 [2024-11-28 05:19:08,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:19:08,763 INFO L471 AbstractCegarLoop]: Abstraction has 114 states and 146 transitions. [2024-11-28 05:19:08,763 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-28 05:19:08,764 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 146 transitions. [2024-11-28 05:19:08,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-28 05:19:08,764 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:19:08,765 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:19:08,774 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-28 05:19:08,969 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-28 05:19:08,969 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:19:08,969 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:19:08,969 INFO L85 PathProgramCache]: Analyzing trace with hash -1420158312, now seen corresponding path program 1 times [2024-11-28 05:19:08,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:19:08,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246446306] [2024-11-28 05:19:08,970 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:19:08,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:19:08,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:19:09,109 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-28 05:19:09,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:19:09,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246446306] [2024-11-28 05:19:09,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246446306] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:19:09,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415589623] [2024-11-28 05:19:09,110 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:19:09,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:19:09,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:19:09,112 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:19:09,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-28 05:19:09,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:19:09,203 INFO L256 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-28 05:19:09,205 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:19:09,389 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-28 05:19:09,390 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:19:09,619 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-28 05:19:09,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415589623] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:19:09,619 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:19:09,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 10] total 15 [2024-11-28 05:19:09,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562763291] [2024-11-28 05:19:09,620 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:19:09,620 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-28 05:19:09,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:19:09,620 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-28 05:19:09,621 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2024-11-28 05:19:09,621 INFO L87 Difference]: Start difference. First operand 114 states and 146 transitions. Second operand has 15 states, 14 states have (on average 4.214285714285714) internal successors, (59), 14 states have internal predecessors, (59), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-28 05:19:09,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:19:09,828 INFO L93 Difference]: Finished difference Result 155 states and 204 transitions. [2024-11-28 05:19:09,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 05:19:09,828 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 4.214285714285714) internal successors, (59), 14 states have internal predecessors, (59), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 41 [2024-11-28 05:19:09,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:19:09,829 INFO L225 Difference]: With dead ends: 155 [2024-11-28 05:19:09,830 INFO L226 Difference]: Without dead ends: 148 [2024-11-28 05:19:09,830 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 71 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2024-11-28 05:19:09,831 INFO L435 NwaCegarLoop]: 59 mSDtfsCounter, 97 mSDsluCounter, 529 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 588 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 05:19:09,831 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 588 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 05:19:09,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2024-11-28 05:19:09,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 123. [2024-11-28 05:19:09,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 109 states have (on average 1.2844036697247707) internal successors, (140), 114 states have internal predecessors, (140), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-28 05:19:09,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 157 transitions. [2024-11-28 05:19:09,844 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 157 transitions. Word has length 41 [2024-11-28 05:19:09,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:19:09,845 INFO L471 AbstractCegarLoop]: Abstraction has 123 states and 157 transitions. [2024-11-28 05:19:09,845 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 4.214285714285714) internal successors, (59), 14 states have internal predecessors, (59), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-28 05:19:09,845 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 157 transitions. [2024-11-28 05:19:09,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-28 05:19:09,846 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:19:09,846 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:19:09,855 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-28 05:19:10,050 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-28 05:19:10,050 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:19:10,051 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:19:10,051 INFO L85 PathProgramCache]: Analyzing trace with hash -1418311270, now seen corresponding path program 1 times [2024-11-28 05:19:10,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:19:10,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133952747] [2024-11-28 05:19:10,051 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:19:10,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:19:10,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:19:10,328 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-28 05:19:10,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:19:10,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133952747] [2024-11-28 05:19:10,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133952747] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:19:10,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133962210] [2024-11-28 05:19:10,328 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:19:10,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:19:10,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:19:10,330 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:19:10,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-28 05:19:10,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:19:10,422 INFO L256 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-28 05:19:10,424 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:19:10,537 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-28 05:19:10,537 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:19:10,680 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-28 05:19:10,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133962210] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-28 05:19:10,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-28 05:19:10,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 6] total 13 [2024-11-28 05:19:10,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045555284] [2024-11-28 05:19:10,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:19:10,681 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 05:19:10,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:19:10,682 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 05:19:10,682 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2024-11-28 05:19:10,683 INFO L87 Difference]: Start difference. First operand 123 states and 157 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-28 05:19:10,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:19:10,772 INFO L93 Difference]: Finished difference Result 145 states and 187 transitions. [2024-11-28 05:19:10,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 05:19:10,773 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 41 [2024-11-28 05:19:10,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:19:10,776 INFO L225 Difference]: With dead ends: 145 [2024-11-28 05:19:10,776 INFO L226 Difference]: Without dead ends: 136 [2024-11-28 05:19:10,777 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2024-11-28 05:19:10,778 INFO L435 NwaCegarLoop]: 69 mSDtfsCounter, 34 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 05:19:10,778 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 178 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 05:19:10,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2024-11-28 05:19:10,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 127. [2024-11-28 05:19:10,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 113 states have (on average 1.2831858407079646) internal successors, (145), 118 states have internal predecessors, (145), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-28 05:19:10,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 162 transitions. [2024-11-28 05:19:10,801 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 162 transitions. Word has length 41 [2024-11-28 05:19:10,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:19:10,801 INFO L471 AbstractCegarLoop]: Abstraction has 127 states and 162 transitions. [2024-11-28 05:19:10,801 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-28 05:19:10,801 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 162 transitions. [2024-11-28 05:19:10,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-28 05:19:10,802 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:19:10,803 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:19:10,813 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-28 05:19:11,003 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-28 05:19:11,003 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:19:11,004 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:19:11,004 INFO L85 PathProgramCache]: Analyzing trace with hash -1441121776, now seen corresponding path program 1 times [2024-11-28 05:19:11,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:19:11,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690742833] [2024-11-28 05:19:11,004 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:19:11,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:19:11,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:19:11,172 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-28 05:19:11,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:19:11,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690742833] [2024-11-28 05:19:11,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690742833] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:19:11,172 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:19:11,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 05:19:11,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548415890] [2024-11-28 05:19:11,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:19:11,173 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 05:19:11,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:19:11,173 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 05:19:11,174 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-28 05:19:11,174 INFO L87 Difference]: Start difference. First operand 127 states and 162 transitions. Second operand has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-28 05:19:11,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:19:11,253 INFO L93 Difference]: Finished difference Result 140 states and 176 transitions. [2024-11-28 05:19:11,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 05:19:11,254 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 42 [2024-11-28 05:19:11,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:19:11,255 INFO L225 Difference]: With dead ends: 140 [2024-11-28 05:19:11,255 INFO L226 Difference]: Without dead ends: 131 [2024-11-28 05:19:11,255 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-28 05:19:11,256 INFO L435 NwaCegarLoop]: 57 mSDtfsCounter, 32 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 05:19:11,256 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 154 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 05:19:11,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2024-11-28 05:19:11,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 125. [2024-11-28 05:19:11,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 111 states have (on average 1.2792792792792793) internal successors, (142), 116 states have internal predecessors, (142), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-28 05:19:11,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 159 transitions. [2024-11-28 05:19:11,270 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 159 transitions. Word has length 42 [2024-11-28 05:19:11,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:19:11,271 INFO L471 AbstractCegarLoop]: Abstraction has 125 states and 159 transitions. [2024-11-28 05:19:11,271 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-28 05:19:11,271 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 159 transitions. [2024-11-28 05:19:11,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-28 05:19:11,272 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:19:11,272 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:19:11,272 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-28 05:19:11,272 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:19:11,272 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:19:11,273 INFO L85 PathProgramCache]: Analyzing trace with hash 1997211126, now seen corresponding path program 1 times [2024-11-28 05:19:11,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:19:11,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129933093] [2024-11-28 05:19:11,273 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:19:11,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:19:11,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:19:11,422 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-28 05:19:11,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:19:11,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129933093] [2024-11-28 05:19:11,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129933093] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:19:11,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342914553] [2024-11-28 05:19:11,422 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:19:11,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:19:11,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:19:11,424 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:19:11,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-28 05:19:11,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:19:11,518 INFO L256 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-28 05:19:11,520 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:19:11,538 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 05:19:11,538 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 05:19:11,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342914553] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:19:11,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-28 05:19:11,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2024-11-28 05:19:11,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657236774] [2024-11-28 05:19:11,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:19:11,539 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 05:19:11,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:19:11,539 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 05:19:11,539 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-28 05:19:11,540 INFO L87 Difference]: Start difference. First operand 125 states and 159 transitions. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-28 05:19:11,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:19:11,580 INFO L93 Difference]: Finished difference Result 150 states and 193 transitions. [2024-11-28 05:19:11,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 05:19:11,580 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 43 [2024-11-28 05:19:11,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:19:11,581 INFO L225 Difference]: With dead ends: 150 [2024-11-28 05:19:11,582 INFO L226 Difference]: Without dead ends: 132 [2024-11-28 05:19:11,582 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-28 05:19:11,584 INFO L435 NwaCegarLoop]: 64 mSDtfsCounter, 3 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 05:19:11,585 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 123 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 05:19:11,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2024-11-28 05:19:11,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 129. [2024-11-28 05:19:11,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 115 states have (on average 1.2869565217391303) internal successors, (148), 120 states have internal predecessors, (148), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-28 05:19:11,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 165 transitions. [2024-11-28 05:19:11,604 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 165 transitions. Word has length 43 [2024-11-28 05:19:11,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:19:11,604 INFO L471 AbstractCegarLoop]: Abstraction has 129 states and 165 transitions. [2024-11-28 05:19:11,605 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-28 05:19:11,605 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 165 transitions. [2024-11-28 05:19:11,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-28 05:19:11,605 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:19:11,606 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:19:11,616 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-28 05:19:11,806 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-28 05:19:11,807 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:19:11,807 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:19:11,807 INFO L85 PathProgramCache]: Analyzing trace with hash 1944453300, now seen corresponding path program 1 times [2024-11-28 05:19:11,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:19:11,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602163681] [2024-11-28 05:19:11,807 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:19:11,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:19:11,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:19:12,167 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 05:19:12,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:19:12,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602163681] [2024-11-28 05:19:12,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602163681] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:19:12,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353404865] [2024-11-28 05:19:12,168 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:19:12,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:19:12,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:19:12,170 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:19:12,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-28 05:19:12,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:19:12,281 INFO L256 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 56 conjuncts are in the unsatisfiable core [2024-11-28 05:19:12,285 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:19:12,332 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 05:19:12,373 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 05:19:12,820 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 20 treesize of output 12 [2024-11-28 05:19:12,825 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 16 treesize of output 8 [2024-11-28 05:19:12,848 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-28 05:19:12,850 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:19:13,291 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-28 05:19:13,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353404865] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-28 05:19:13,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-28 05:19:13,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [9, 14] total 30 [2024-11-28 05:19:13,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867988196] [2024-11-28 05:19:13,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:19:13,292 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-28 05:19:13,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:19:13,293 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-28 05:19:13,294 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=762, Unknown=0, NotChecked=0, Total=870 [2024-11-28 05:19:13,294 INFO L87 Difference]: Start difference. First operand 129 states and 165 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-28 05:19:13,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:19:13,795 INFO L93 Difference]: Finished difference Result 235 states and 310 transitions. [2024-11-28 05:19:13,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-28 05:19:13,796 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 45 [2024-11-28 05:19:13,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:19:13,797 INFO L225 Difference]: With dead ends: 235 [2024-11-28 05:19:13,797 INFO L226 Difference]: Without dead ends: 226 [2024-11-28 05:19:13,798 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=169, Invalid=1091, Unknown=0, NotChecked=0, Total=1260 [2024-11-28 05:19:13,799 INFO L435 NwaCegarLoop]: 87 mSDtfsCounter, 96 mSDsluCounter, 469 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 556 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 05:19:13,800 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 556 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 05:19:13,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2024-11-28 05:19:13,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 175. [2024-11-28 05:19:13,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 161 states have (on average 1.3229813664596273) internal successors, (213), 166 states have internal predecessors, (213), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-28 05:19:13,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 230 transitions. [2024-11-28 05:19:13,839 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 230 transitions. Word has length 45 [2024-11-28 05:19:13,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:19:13,840 INFO L471 AbstractCegarLoop]: Abstraction has 175 states and 230 transitions. [2024-11-28 05:19:13,840 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-28 05:19:13,840 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 230 transitions. [2024-11-28 05:19:13,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-28 05:19:13,842 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:19:13,842 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:19:13,851 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-28 05:19:14,046 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-28 05:19:14,046 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:19:14,046 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:19:14,046 INFO L85 PathProgramCache]: Analyzing trace with hash 1264394930, now seen corresponding path program 1 times [2024-11-28 05:19:14,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:19:14,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452453685] [2024-11-28 05:19:14,047 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:19:14,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:19:14,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:19:14,434 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 05:19:14,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:19:14,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452453685] [2024-11-28 05:19:14,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452453685] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:19:14,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783739641] [2024-11-28 05:19:14,435 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:19:14,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:19:14,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:19:14,438 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:19:14,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-28 05:19:14,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:19:14,542 INFO L256 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-28 05:19:14,544 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:19:14,697 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-28 05:19:14,697 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:19:14,868 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 05:19:14,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783739641] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:19:14,868 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:19:14,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 19 [2024-11-28 05:19:14,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216541747] [2024-11-28 05:19:14,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:19:14,869 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-28 05:19:14,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:19:14,871 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-28 05:19:14,872 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2024-11-28 05:19:14,872 INFO L87 Difference]: Start difference. First operand 175 states and 230 transitions. Second operand has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 19 states have internal predecessors, (66), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-28 05:19:15,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:19:15,692 INFO L93 Difference]: Finished difference Result 357 states and 476 transitions. [2024-11-28 05:19:15,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-28 05:19:15,693 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 19 states have internal predecessors, (66), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 45 [2024-11-28 05:19:15,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:19:15,695 INFO L225 Difference]: With dead ends: 357 [2024-11-28 05:19:15,696 INFO L226 Difference]: Without dead ends: 220 [2024-11-28 05:19:15,697 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 79 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=158, Invalid=898, Unknown=0, NotChecked=0, Total=1056 [2024-11-28 05:19:15,698 INFO L435 NwaCegarLoop]: 50 mSDtfsCounter, 130 mSDsluCounter, 545 mSDsCounter, 0 mSdLazyCounter, 391 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 595 SdHoareTripleChecker+Invalid, 401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-28 05:19:15,698 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 595 Invalid, 401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 391 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-28 05:19:15,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2024-11-28 05:19:15,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 144. [2024-11-28 05:19:15,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 130 states have (on average 1.2769230769230768) internal successors, (166), 135 states have internal predecessors, (166), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-28 05:19:15,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 183 transitions. [2024-11-28 05:19:15,733 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 183 transitions. Word has length 45 [2024-11-28 05:19:15,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:19:15,733 INFO L471 AbstractCegarLoop]: Abstraction has 144 states and 183 transitions. [2024-11-28 05:19:15,733 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 19 states have internal predecessors, (66), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-28 05:19:15,733 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 183 transitions. [2024-11-28 05:19:15,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-28 05:19:15,738 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:19:15,738 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:19:15,748 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-28 05:19:15,939 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-28 05:19:15,939 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:19:15,939 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:19:15,940 INFO L85 PathProgramCache]: Analyzing trace with hash -839027414, now seen corresponding path program 1 times [2024-11-28 05:19:15,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:19:15,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316549703] [2024-11-28 05:19:15,940 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:19:15,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:19:15,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:19:16,759 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-28 05:19:16,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:19:16,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316549703] [2024-11-28 05:19:16,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316549703] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:19:16,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382606979] [2024-11-28 05:19:16,759 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:19:16,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:19:16,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:19:16,762 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:19:16,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-28 05:19:16,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:19:16,865 INFO L256 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 57 conjuncts are in the unsatisfiable core [2024-11-28 05:19:16,868 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:19:16,951 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 05:19:17,241 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 20 treesize of output 12 [2024-11-28 05:19:17,246 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 16 treesize of output 8 [2024-11-28 05:19:17,265 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-28 05:19:17,265 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:19:17,592 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:19:17,592 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 35 treesize of output 38 [2024-11-28 05:19:17,700 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-28 05:19:17,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382606979] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:19:17,700 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:19:17,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 12] total 32 [2024-11-28 05:19:17,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439412719] [2024-11-28 05:19:17,700 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:19:17,701 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-28 05:19:17,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:19:17,701 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-28 05:19:17,702 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=862, Unknown=0, NotChecked=0, Total=992 [2024-11-28 05:19:17,702 INFO L87 Difference]: Start difference. First operand 144 states and 183 transitions. Second operand has 32 states, 31 states have (on average 2.967741935483871) internal successors, (92), 31 states have internal predecessors, (92), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-28 05:19:18,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:19:18,942 INFO L93 Difference]: Finished difference Result 222 states and 285 transitions. [2024-11-28 05:19:18,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-28 05:19:18,943 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.967741935483871) internal successors, (92), 31 states have internal predecessors, (92), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 46 [2024-11-28 05:19:18,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:19:18,944 INFO L225 Difference]: With dead ends: 222 [2024-11-28 05:19:18,944 INFO L226 Difference]: Without dead ends: 198 [2024-11-28 05:19:18,945 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=245, Invalid=1647, Unknown=0, NotChecked=0, Total=1892 [2024-11-28 05:19:18,946 INFO L435 NwaCegarLoop]: 83 mSDtfsCounter, 142 mSDsluCounter, 1244 mSDsCounter, 0 mSdLazyCounter, 963 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 1327 SdHoareTripleChecker+Invalid, 966 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 963 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-28 05:19:18,946 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 1327 Invalid, 966 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 963 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-28 05:19:18,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2024-11-28 05:19:18,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 152. [2024-11-28 05:19:18,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 138 states have (on average 1.2753623188405796) internal successors, (176), 143 states have internal predecessors, (176), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-28 05:19:18,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 193 transitions. [2024-11-28 05:19:18,972 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 193 transitions. Word has length 46 [2024-11-28 05:19:18,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:19:18,972 INFO L471 AbstractCegarLoop]: Abstraction has 152 states and 193 transitions. [2024-11-28 05:19:18,972 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.967741935483871) internal successors, (92), 31 states have internal predecessors, (92), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-28 05:19:18,972 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 193 transitions. [2024-11-28 05:19:18,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-28 05:19:18,973 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:19:18,974 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:19:18,983 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-28 05:19:19,174 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-28 05:19:19,175 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:19:19,175 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:19:19,175 INFO L85 PathProgramCache]: Analyzing trace with hash -1517238742, now seen corresponding path program 1 times [2024-11-28 05:19:19,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:19:19,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513456639] [2024-11-28 05:19:19,175 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:19:19,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:19:19,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:19:19,442 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 05:19:19,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:19:19,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513456639] [2024-11-28 05:19:19,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513456639] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:19:19,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591099774] [2024-11-28 05:19:19,443 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:19:19,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:19:19,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:19:19,445 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:19:19,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-28 05:19:19,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:19:19,553 INFO L256 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-28 05:19:19,554 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:19:19,744 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 05:19:19,744 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:19:20,027 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 05:19:20,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591099774] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:19:20,027 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:19:20,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 16 [2024-11-28 05:19:20,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658920275] [2024-11-28 05:19:20,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:19:20,028 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-28 05:19:20,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:19:20,029 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-28 05:19:20,029 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2024-11-28 05:19:20,029 INFO L87 Difference]: Start difference. First operand 152 states and 193 transitions. Second operand has 16 states, 16 states have (on average 4.4375) internal successors, (71), 16 states have internal predecessors, (71), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-28 05:19:20,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:19:20,422 INFO L93 Difference]: Finished difference Result 251 states and 333 transitions. [2024-11-28 05:19:20,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-28 05:19:20,422 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.4375) internal successors, (71), 16 states have internal predecessors, (71), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 46 [2024-11-28 05:19:20,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:19:20,424 INFO L225 Difference]: With dead ends: 251 [2024-11-28 05:19:20,424 INFO L226 Difference]: Without dead ends: 225 [2024-11-28 05:19:20,425 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 83 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2024-11-28 05:19:20,425 INFO L435 NwaCegarLoop]: 90 mSDtfsCounter, 79 mSDsluCounter, 860 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 950 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 05:19:20,425 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 950 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 311 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-28 05:19:20,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2024-11-28 05:19:20,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 175. [2024-11-28 05:19:20,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 160 states have (on average 1.2625) internal successors, (202), 165 states have internal predecessors, (202), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 6 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-28 05:19:20,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 221 transitions. [2024-11-28 05:19:20,453 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 221 transitions. Word has length 46 [2024-11-28 05:19:20,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:19:20,453 INFO L471 AbstractCegarLoop]: Abstraction has 175 states and 221 transitions. [2024-11-28 05:19:20,454 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.4375) internal successors, (71), 16 states have internal predecessors, (71), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-28 05:19:20,454 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 221 transitions. [2024-11-28 05:19:20,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-28 05:19:20,454 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:19:20,455 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:19:20,464 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-28 05:19:20,655 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:19:20,656 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:19:20,656 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:19:20,656 INFO L85 PathProgramCache]: Analyzing trace with hash 276731014, now seen corresponding path program 1 times [2024-11-28 05:19:20,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:19:20,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954598553] [2024-11-28 05:19:20,656 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:19:20,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:19:20,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:19:20,721 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 05:19:20,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:19:20,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954598553] [2024-11-28 05:19:20,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954598553] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:19:20,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:19:20,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 05:19:20,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323583622] [2024-11-28 05:19:20,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:19:20,722 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 05:19:20,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:19:20,724 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 05:19:20,724 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-28 05:19:20,724 INFO L87 Difference]: Start difference. First operand 175 states and 221 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-28 05:19:20,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:19:20,779 INFO L93 Difference]: Finished difference Result 195 states and 245 transitions. [2024-11-28 05:19:20,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 05:19:20,779 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 48 [2024-11-28 05:19:20,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:19:20,781 INFO L225 Difference]: With dead ends: 195 [2024-11-28 05:19:20,781 INFO L226 Difference]: Without dead ends: 176 [2024-11-28 05:19:20,781 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-28 05:19:20,783 INFO L435 NwaCegarLoop]: 64 mSDtfsCounter, 2 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 05:19:20,783 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 174 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 05:19:20,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2024-11-28 05:19:20,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 174. [2024-11-28 05:19:20,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 159 states have (on average 1.251572327044025) internal successors, (199), 163 states have internal predecessors, (199), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 6 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-28 05:19:20,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 218 transitions. [2024-11-28 05:19:20,811 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 218 transitions. Word has length 48 [2024-11-28 05:19:20,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:19:20,811 INFO L471 AbstractCegarLoop]: Abstraction has 174 states and 218 transitions. [2024-11-28 05:19:20,811 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-28 05:19:20,811 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 218 transitions. [2024-11-28 05:19:20,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-28 05:19:20,812 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:19:20,812 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:19:20,812 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-11-28 05:19:20,813 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:19:20,813 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:19:20,813 INFO L85 PathProgramCache]: Analyzing trace with hash -1259513722, now seen corresponding path program 2 times [2024-11-28 05:19:20,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:19:20,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712206690] [2024-11-28 05:19:20,813 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:19:20,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:19:20,839 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-28 05:19:20,839 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:19:21,423 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-28 05:19:21,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:19:21,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712206690] [2024-11-28 05:19:21,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712206690] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:19:21,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:19:21,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 05:19:21,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132532851] [2024-11-28 05:19:21,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:19:21,425 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 05:19:21,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:19:21,426 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 05:19:21,426 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 05:19:21,426 INFO L87 Difference]: Start difference. First operand 174 states and 218 transitions. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-28 05:19:21,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:19:21,674 INFO L93 Difference]: Finished difference Result 221 states and 277 transitions. [2024-11-28 05:19:21,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 05:19:21,675 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 48 [2024-11-28 05:19:21,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:19:21,676 INFO L225 Difference]: With dead ends: 221 [2024-11-28 05:19:21,676 INFO L226 Difference]: Without dead ends: 212 [2024-11-28 05:19:21,677 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-28 05:19:21,677 INFO L435 NwaCegarLoop]: 72 mSDtfsCounter, 21 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 05:19:21,678 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 220 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 05:19:21,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2024-11-28 05:19:21,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 178. [2024-11-28 05:19:21,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 163 states have (on average 1.2453987730061349) internal successors, (203), 167 states have internal predecessors, (203), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 6 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-28 05:19:21,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 222 transitions. [2024-11-28 05:19:21,714 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 222 transitions. Word has length 48 [2024-11-28 05:19:21,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:19:21,714 INFO L471 AbstractCegarLoop]: Abstraction has 178 states and 222 transitions. [2024-11-28 05:19:21,714 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-28 05:19:21,714 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 222 transitions. [2024-11-28 05:19:21,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-28 05:19:21,715 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:19:21,715 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:19:21,716 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-11-28 05:19:21,716 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:19:21,716 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:19:21,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1708958906, now seen corresponding path program 2 times [2024-11-28 05:19:21,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:19:21,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342596518] [2024-11-28 05:19:21,717 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:19:21,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:19:21,785 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:19:21,785 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:19:23,289 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-28 05:19:23,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:19:23,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342596518] [2024-11-28 05:19:23,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342596518] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:19:23,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845750670] [2024-11-28 05:19:23,289 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:19:23,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:19:23,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:19:23,292 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:19:23,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-28 05:19:23,425 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:19:23,425 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:19:23,426 INFO L256 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-28 05:19:23,429 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:19:23,689 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-28 05:19:23,689 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:19:24,048 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-28 05:19:24,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845750670] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:19:24,048 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:19:24,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 8, 8] total 27 [2024-11-28 05:19:24,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184754038] [2024-11-28 05:19:24,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:19:24,049 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-28 05:19:24,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:19:24,050 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-28 05:19:24,050 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2024-11-28 05:19:24,050 INFO L87 Difference]: Start difference. First operand 178 states and 222 transitions. Second operand has 27 states, 27 states have (on average 2.8518518518518516) internal successors, (77), 27 states have internal predecessors, (77), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-28 05:19:26,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:19:26,013 INFO L93 Difference]: Finished difference Result 447 states and 580 transitions. [2024-11-28 05:19:26,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-28 05:19:26,014 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.8518518518518516) internal successors, (77), 27 states have internal predecessors, (77), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 49 [2024-11-28 05:19:26,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:19:26,016 INFO L225 Difference]: With dead ends: 447 [2024-11-28 05:19:26,016 INFO L226 Difference]: Without dead ends: 389 [2024-11-28 05:19:26,018 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 89 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=198, Invalid=1524, Unknown=0, NotChecked=0, Total=1722 [2024-11-28 05:19:26,020 INFO L435 NwaCegarLoop]: 117 mSDtfsCounter, 265 mSDsluCounter, 1394 mSDsCounter, 0 mSdLazyCounter, 975 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 1511 SdHoareTripleChecker+Invalid, 1006 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 975 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-28 05:19:26,023 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [277 Valid, 1511 Invalid, 1006 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 975 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-28 05:19:26,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2024-11-28 05:19:26,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 214. [2024-11-28 05:19:26,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 199 states have (on average 1.256281407035176) internal successors, (250), 203 states have internal predecessors, (250), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 6 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-28 05:19:26,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 269 transitions. [2024-11-28 05:19:26,077 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 269 transitions. Word has length 49 [2024-11-28 05:19:26,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:19:26,077 INFO L471 AbstractCegarLoop]: Abstraction has 214 states and 269 transitions. [2024-11-28 05:19:26,077 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.8518518518518516) internal successors, (77), 27 states have internal predecessors, (77), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-28 05:19:26,077 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 269 transitions. [2024-11-28 05:19:26,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-11-28 05:19:26,081 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:19:26,082 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:19:26,091 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-28 05:19:26,286 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:19:26,286 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:19:26,286 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:19:26,286 INFO L85 PathProgramCache]: Analyzing trace with hash 1866805766, now seen corresponding path program 1 times [2024-11-28 05:19:26,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:19:26,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168179147] [2024-11-28 05:19:26,287 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:19:26,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:19:26,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:19:26,484 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-28 05:19:26,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:19:26,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168179147] [2024-11-28 05:19:26,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168179147] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:19:26,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339018093] [2024-11-28 05:19:26,485 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:19:26,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:19:26,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:19:26,487 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:19:26,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-28 05:19:26,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:19:26,595 INFO L256 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-28 05:19:26,596 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:19:26,711 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-28 05:19:26,711 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:19:26,861 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-28 05:19:26,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339018093] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:19:26,862 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:19:26,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2024-11-28 05:19:26,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002731110] [2024-11-28 05:19:26,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:19:26,862 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-28 05:19:26,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:19:26,864 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-28 05:19:26,864 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2024-11-28 05:19:26,864 INFO L87 Difference]: Start difference. First operand 214 states and 269 transitions. Second operand has 16 states, 16 states have (on average 4.3125) internal successors, (69), 16 states have internal predecessors, (69), 6 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2024-11-28 05:19:27,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:19:27,164 INFO L93 Difference]: Finished difference Result 254 states and 321 transitions. [2024-11-28 05:19:27,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-28 05:19:27,165 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.3125) internal successors, (69), 16 states have internal predecessors, (69), 6 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 51 [2024-11-28 05:19:27,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:19:27,166 INFO L225 Difference]: With dead ends: 254 [2024-11-28 05:19:27,166 INFO L226 Difference]: Without dead ends: 188 [2024-11-28 05:19:27,167 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2024-11-28 05:19:27,167 INFO L435 NwaCegarLoop]: 59 mSDtfsCounter, 20 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 05:19:27,167 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 354 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 05:19:27,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2024-11-28 05:19:27,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 180. [2024-11-28 05:19:27,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 167 states have (on average 1.2694610778443114) internal successors, (212), 170 states have internal predecessors, (212), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-28 05:19:27,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 229 transitions. [2024-11-28 05:19:27,207 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 229 transitions. Word has length 51 [2024-11-28 05:19:27,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:19:27,207 INFO L471 AbstractCegarLoop]: Abstraction has 180 states and 229 transitions. [2024-11-28 05:19:27,207 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.3125) internal successors, (69), 16 states have internal predecessors, (69), 6 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2024-11-28 05:19:27,207 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 229 transitions. [2024-11-28 05:19:27,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-11-28 05:19:27,208 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:19:27,209 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:19:27,218 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-28 05:19:27,414 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:19:27,414 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:19:27,417 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:19:27,417 INFO L85 PathProgramCache]: Analyzing trace with hash -1820414820, now seen corresponding path program 1 times [2024-11-28 05:19:27,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:19:27,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247343254] [2024-11-28 05:19:27,418 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:19:27,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:19:27,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:19:27,598 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-28 05:19:27,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:19:27,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247343254] [2024-11-28 05:19:27,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247343254] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:19:27,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162986276] [2024-11-28 05:19:27,598 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:19:27,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:19:27,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:19:27,601 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:19:27,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-28 05:19:27,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:19:27,761 INFO L256 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-28 05:19:27,762 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:19:27,815 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-28 05:19:27,815 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:19:27,932 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-28 05:19:27,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162986276] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:19:27,932 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:19:27,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2024-11-28 05:19:27,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421127787] [2024-11-28 05:19:27,933 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:19:27,933 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-28 05:19:27,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:19:27,933 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-28 05:19:27,933 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2024-11-28 05:19:27,934 INFO L87 Difference]: Start difference. First operand 180 states and 229 transitions. Second operand has 15 states, 12 states have (on average 4.583333333333333) internal successors, (55), 13 states have internal predecessors, (55), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-28 05:19:28,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:19:28,197 INFO L93 Difference]: Finished difference Result 296 states and 385 transitions. [2024-11-28 05:19:28,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-28 05:19:28,198 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 4.583333333333333) internal successors, (55), 13 states have internal predecessors, (55), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 52 [2024-11-28 05:19:28,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:19:28,199 INFO L225 Difference]: With dead ends: 296 [2024-11-28 05:19:28,199 INFO L226 Difference]: Without dead ends: 262 [2024-11-28 05:19:28,200 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 95 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2024-11-28 05:19:28,201 INFO L435 NwaCegarLoop]: 87 mSDtfsCounter, 148 mSDsluCounter, 636 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 723 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 05:19:28,201 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 723 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 05:19:28,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2024-11-28 05:19:28,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 228. [2024-11-28 05:19:28,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 215 states have (on average 1.2744186046511627) internal successors, (274), 218 states have internal predecessors, (274), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-28 05:19:28,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 291 transitions. [2024-11-28 05:19:28,269 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 291 transitions. Word has length 52 [2024-11-28 05:19:28,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:19:28,270 INFO L471 AbstractCegarLoop]: Abstraction has 228 states and 291 transitions. [2024-11-28 05:19:28,270 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 4.583333333333333) internal successors, (55), 13 states have internal predecessors, (55), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-28 05:19:28,270 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 291 transitions. [2024-11-28 05:19:28,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-28 05:19:28,270 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:19:28,271 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:19:28,280 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-28 05:19:28,475 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:19:28,476 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:19:28,476 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:19:28,476 INFO L85 PathProgramCache]: Analyzing trace with hash 40741697, now seen corresponding path program 1 times [2024-11-28 05:19:28,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:19:28,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253830515] [2024-11-28 05:19:28,477 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:19:28,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:19:28,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:19:28,711 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-28 05:19:28,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:19:28,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253830515] [2024-11-28 05:19:28,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253830515] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:19:28,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379902615] [2024-11-28 05:19:28,711 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:19:28,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:19:28,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:19:28,714 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:19:28,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-28 05:19:28,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:19:28,827 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-28 05:19:28,829 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:19:28,944 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-28 05:19:28,944 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:19:29,108 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-28 05:19:29,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379902615] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:19:29,108 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:19:29,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 7] total 18 [2024-11-28 05:19:29,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21385552] [2024-11-28 05:19:29,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:19:29,109 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-28 05:19:29,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:19:29,109 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-28 05:19:29,109 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2024-11-28 05:19:29,109 INFO L87 Difference]: Start difference. First operand 228 states and 291 transitions. Second operand has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 18 states have internal predecessors, (60), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-28 05:19:29,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:19:29,452 INFO L93 Difference]: Finished difference Result 276 states and 353 transitions. [2024-11-28 05:19:29,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-28 05:19:29,452 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 18 states have internal predecessors, (60), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 54 [2024-11-28 05:19:29,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:19:29,454 INFO L225 Difference]: With dead ends: 276 [2024-11-28 05:19:29,454 INFO L226 Difference]: Without dead ends: 216 [2024-11-28 05:19:29,454 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2024-11-28 05:19:29,455 INFO L435 NwaCegarLoop]: 56 mSDtfsCounter, 39 mSDsluCounter, 430 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 486 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 05:19:29,455 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 486 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 05:19:29,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2024-11-28 05:19:29,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 213. [2024-11-28 05:19:29,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 201 states have (on average 1.2736318407960199) internal successors, (256), 204 states have internal predecessors, (256), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-28 05:19:29,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 271 transitions. [2024-11-28 05:19:29,500 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 271 transitions. Word has length 54 [2024-11-28 05:19:29,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:19:29,500 INFO L471 AbstractCegarLoop]: Abstraction has 213 states and 271 transitions. [2024-11-28 05:19:29,500 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 18 states have internal predecessors, (60), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-28 05:19:29,500 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 271 transitions. [2024-11-28 05:19:29,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-28 05:19:29,501 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:19:29,502 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:19:29,511 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-28 05:19:29,702 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:19:29,703 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:19:29,703 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:19:29,703 INFO L85 PathProgramCache]: Analyzing trace with hash -1888891948, now seen corresponding path program 1 times [2024-11-28 05:19:29,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:19:29,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675357014] [2024-11-28 05:19:29,703 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:19:29,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:19:29,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:19:30,837 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-28 05:19:30,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:19:30,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675357014] [2024-11-28 05:19:30,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675357014] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:19:30,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156908469] [2024-11-28 05:19:30,838 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:19:30,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:19:30,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:19:30,840 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:19:30,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-28 05:19:30,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:19:30,983 INFO L256 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 63 conjuncts are in the unsatisfiable core [2024-11-28 05:19:30,988 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:19:31,152 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 15 treesize of output 1 [2024-11-28 05:19:31,598 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 20 treesize of output 12 [2024-11-28 05:19:31,601 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 16 treesize of output 8 [2024-11-28 05:19:31,623 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 05:19:31,624 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:19:31,972 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:19:31,973 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 37 treesize of output 41 [2024-11-28 05:19:32,227 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-28 05:19:32,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156908469] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:19:32,227 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:19:32,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 21, 12] total 34 [2024-11-28 05:19:32,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171091767] [2024-11-28 05:19:32,228 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:19:32,228 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-28 05:19:32,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:19:32,229 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-28 05:19:32,229 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=999, Unknown=0, NotChecked=0, Total=1122 [2024-11-28 05:19:32,229 INFO L87 Difference]: Start difference. First operand 213 states and 271 transitions. Second operand has 34 states, 34 states have (on average 2.5588235294117645) internal successors, (87), 33 states have internal predecessors, (87), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-28 05:19:33,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:19:33,529 INFO L93 Difference]: Finished difference Result 388 states and 490 transitions. [2024-11-28 05:19:33,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-28 05:19:33,530 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.5588235294117645) internal successors, (87), 33 states have internal predecessors, (87), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 53 [2024-11-28 05:19:33,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:19:33,531 INFO L225 Difference]: With dead ends: 388 [2024-11-28 05:19:33,531 INFO L226 Difference]: Without dead ends: 265 [2024-11-28 05:19:33,532 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=261, Invalid=1809, Unknown=0, NotChecked=0, Total=2070 [2024-11-28 05:19:33,533 INFO L435 NwaCegarLoop]: 44 mSDtfsCounter, 174 mSDsluCounter, 696 mSDsCounter, 0 mSdLazyCounter, 1054 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 740 SdHoareTripleChecker+Invalid, 1063 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1054 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-28 05:19:33,533 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 740 Invalid, 1063 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1054 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-28 05:19:33,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2024-11-28 05:19:33,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 228. [2024-11-28 05:19:33,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 216 states have (on average 1.2638888888888888) internal successors, (273), 219 states have internal predecessors, (273), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-28 05:19:33,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 288 transitions. [2024-11-28 05:19:33,583 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 288 transitions. Word has length 53 [2024-11-28 05:19:33,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:19:33,584 INFO L471 AbstractCegarLoop]: Abstraction has 228 states and 288 transitions. [2024-11-28 05:19:33,584 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.5588235294117645) internal successors, (87), 33 states have internal predecessors, (87), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-28 05:19:33,584 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 288 transitions. [2024-11-28 05:19:33,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-28 05:19:33,585 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:19:33,585 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:19:33,594 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-28 05:19:33,785 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-11-28 05:19:33,786 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:19:33,786 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:19:33,786 INFO L85 PathProgramCache]: Analyzing trace with hash 937757768, now seen corresponding path program 1 times [2024-11-28 05:19:33,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:19:33,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882215334] [2024-11-28 05:19:33,786 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:19:33,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:19:33,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:19:34,055 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-28 05:19:34,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:19:34,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882215334] [2024-11-28 05:19:34,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882215334] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:19:34,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663281467] [2024-11-28 05:19:34,056 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:19:34,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:19:34,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:19:34,058 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:19:34,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-28 05:19:34,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:19:34,186 INFO L256 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-28 05:19:34,187 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:19:34,417 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-28 05:19:34,417 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:19:34,700 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-28 05:19:34,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663281467] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:19:34,701 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:19:34,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 23 [2024-11-28 05:19:34,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265812161] [2024-11-28 05:19:34,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:19:34,702 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-28 05:19:34,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:19:34,702 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-28 05:19:34,702 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2024-11-28 05:19:34,703 INFO L87 Difference]: Start difference. First operand 228 states and 288 transitions. Second operand has 23 states, 23 states have (on average 4.6521739130434785) internal successors, (107), 23 states have internal predecessors, (107), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-28 05:19:35,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:19:35,517 INFO L93 Difference]: Finished difference Result 904 states and 1157 transitions. [2024-11-28 05:19:35,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-28 05:19:35,518 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.6521739130434785) internal successors, (107), 23 states have internal predecessors, (107), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 54 [2024-11-28 05:19:35,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:19:35,521 INFO L225 Difference]: With dead ends: 904 [2024-11-28 05:19:35,522 INFO L226 Difference]: Without dead ends: 761 [2024-11-28 05:19:35,522 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=245, Invalid=1015, Unknown=0, NotChecked=0, Total=1260 [2024-11-28 05:19:35,523 INFO L435 NwaCegarLoop]: 68 mSDtfsCounter, 130 mSDsluCounter, 877 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 945 SdHoareTripleChecker+Invalid, 500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-28 05:19:35,523 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 945 Invalid, 500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 482 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-28 05:19:35,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 761 states. [2024-11-28 05:19:35,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 761 to 337. [2024-11-28 05:19:35,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 325 states have (on average 1.2676923076923077) internal successors, (412), 328 states have internal predecessors, (412), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-28 05:19:35,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 427 transitions. [2024-11-28 05:19:35,599 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 427 transitions. Word has length 54 [2024-11-28 05:19:35,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:19:35,599 INFO L471 AbstractCegarLoop]: Abstraction has 337 states and 427 transitions. [2024-11-28 05:19:35,599 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.6521739130434785) internal successors, (107), 23 states have internal predecessors, (107), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-28 05:19:35,599 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 427 transitions. [2024-11-28 05:19:35,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-11-28 05:19:35,600 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:19:35,600 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:19:35,610 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-11-28 05:19:35,800 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:19:35,801 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:19:35,801 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:19:35,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1568879739, now seen corresponding path program 1 times [2024-11-28 05:19:35,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:19:35,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052146104] [2024-11-28 05:19:35,801 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:19:35,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:19:35,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:19:36,135 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-28 05:19:36,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:19:36,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052146104] [2024-11-28 05:19:36,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052146104] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:19:36,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132956358] [2024-11-28 05:19:36,136 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:19:36,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:19:36,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:19:36,138 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:19:36,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-28 05:19:36,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:19:36,311 INFO L256 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-28 05:19:36,313 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:19:36,611 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-28 05:19:36,611 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:19:37,237 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-28 05:19:37,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132956358] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:19:37,237 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:19:37,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 13, 13] total 29 [2024-11-28 05:19:37,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889447250] [2024-11-28 05:19:37,238 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:19:37,238 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-28 05:19:37,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:19:37,239 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-28 05:19:37,239 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=709, Unknown=0, NotChecked=0, Total=812 [2024-11-28 05:19:37,240 INFO L87 Difference]: Start difference. First operand 337 states and 427 transitions. Second operand has 29 states, 29 states have (on average 2.9655172413793105) internal successors, (86), 29 states have internal predecessors, (86), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-28 05:19:39,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:19:39,604 INFO L93 Difference]: Finished difference Result 644 states and 822 transitions. [2024-11-28 05:19:39,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2024-11-28 05:19:39,604 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.9655172413793105) internal successors, (86), 29 states have internal predecessors, (86), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 58 [2024-11-28 05:19:39,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:19:39,607 INFO L225 Difference]: With dead ends: 644 [2024-11-28 05:19:39,607 INFO L226 Difference]: Without dead ends: 573 [2024-11-28 05:19:39,608 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 880 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=435, Invalid=2987, Unknown=0, NotChecked=0, Total=3422 [2024-11-28 05:19:39,609 INFO L435 NwaCegarLoop]: 63 mSDtfsCounter, 299 mSDsluCounter, 824 mSDsCounter, 0 mSdLazyCounter, 1454 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 887 SdHoareTripleChecker+Invalid, 1508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1454 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-28 05:19:39,609 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [302 Valid, 887 Invalid, 1508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1454 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-28 05:19:39,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2024-11-28 05:19:39,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 387. [2024-11-28 05:19:39,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 373 states have (on average 1.260053619302949) internal successors, (470), 375 states have internal predecessors, (470), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-28 05:19:39,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 489 transitions. [2024-11-28 05:19:39,732 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 489 transitions. Word has length 58 [2024-11-28 05:19:39,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:19:39,734 INFO L471 AbstractCegarLoop]: Abstraction has 387 states and 489 transitions. [2024-11-28 05:19:39,734 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.9655172413793105) internal successors, (86), 29 states have internal predecessors, (86), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-28 05:19:39,734 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 489 transitions. [2024-11-28 05:19:39,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-11-28 05:19:39,735 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:19:39,735 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:19:39,746 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-28 05:19:39,936 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-28 05:19:39,936 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:19:39,937 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:19:39,937 INFO L85 PathProgramCache]: Analyzing trace with hash -68689616, now seen corresponding path program 1 times [2024-11-28 05:19:39,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:19:39,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025409143] [2024-11-28 05:19:39,937 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:19:39,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:19:39,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:19:40,309 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-28 05:19:40,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:19:40,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025409143] [2024-11-28 05:19:40,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025409143] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:19:40,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772243049] [2024-11-28 05:19:40,310 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:19:40,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:19:40,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:19:40,312 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:19:40,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-28 05:19:40,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:19:40,483 INFO L256 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 65 conjuncts are in the unsatisfiable core [2024-11-28 05:19:40,485 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:19:40,616 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 05:19:40,747 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 19 treesize of output 1 [2024-11-28 05:19:41,431 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 24 treesize of output 12 [2024-11-28 05:19:41,433 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 16 treesize of output 8 [2024-11-28 05:19:41,456 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 6 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 05:19:41,456 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:19:41,958 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-28 05:19:41,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772243049] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:19:41,959 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:19:41,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 23, 10] total 40 [2024-11-28 05:19:41,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094032775] [2024-11-28 05:19:41,959 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:19:41,959 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-11-28 05:19:41,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:19:41,960 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-11-28 05:19:41,960 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1394, Unknown=0, NotChecked=0, Total=1560 [2024-11-28 05:19:41,961 INFO L87 Difference]: Start difference. First operand 387 states and 489 transitions. Second operand has 40 states, 40 states have (on average 2.775) internal successors, (111), 39 states have internal predecessors, (111), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-28 05:19:45,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:19:45,049 INFO L93 Difference]: Finished difference Result 1120 states and 1430 transitions. [2024-11-28 05:19:45,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2024-11-28 05:19:45,050 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.775) internal successors, (111), 39 states have internal predecessors, (111), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 57 [2024-11-28 05:19:45,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:19:45,053 INFO L225 Difference]: With dead ends: 1120 [2024-11-28 05:19:45,054 INFO L226 Difference]: Without dead ends: 853 [2024-11-28 05:19:45,055 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1218 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=690, Invalid=4566, Unknown=0, NotChecked=0, Total=5256 [2024-11-28 05:19:45,056 INFO L435 NwaCegarLoop]: 63 mSDtfsCounter, 401 mSDsluCounter, 1110 mSDsCounter, 0 mSdLazyCounter, 2027 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 405 SdHoareTripleChecker+Valid, 1173 SdHoareTripleChecker+Invalid, 2055 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 2027 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-11-28 05:19:45,056 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [405 Valid, 1173 Invalid, 2055 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 2027 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-11-28 05:19:45,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 853 states. [2024-11-28 05:19:45,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 853 to 466. [2024-11-28 05:19:45,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 452 states have (on average 1.2743362831858407) internal successors, (576), 454 states have internal predecessors, (576), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-28 05:19:45,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 595 transitions. [2024-11-28 05:19:45,181 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 595 transitions. Word has length 57 [2024-11-28 05:19:45,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:19:45,181 INFO L471 AbstractCegarLoop]: Abstraction has 466 states and 595 transitions. [2024-11-28 05:19:45,181 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.775) internal successors, (111), 39 states have internal predecessors, (111), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-28 05:19:45,181 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 595 transitions. [2024-11-28 05:19:45,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-11-28 05:19:45,183 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:19:45,183 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:19:45,193 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-28 05:19:45,387 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-11-28 05:19:45,387 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:19:45,387 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:19:45,387 INFO L85 PathProgramCache]: Analyzing trace with hash -1157266304, now seen corresponding path program 2 times [2024-11-28 05:19:45,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:19:45,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132744781] [2024-11-28 05:19:45,388 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:19:45,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:19:45,435 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:19:45,435 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:19:46,008 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-28 05:19:46,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:19:46,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132744781] [2024-11-28 05:19:46,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132744781] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:19:46,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778387972] [2024-11-28 05:19:46,009 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:19:46,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:19:46,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:19:46,011 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:19:46,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-28 05:19:46,159 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:19:46,159 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:19:46,160 INFO L256 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-28 05:19:46,161 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:19:46,475 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-28 05:19:46,475 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:19:46,855 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-28 05:19:46,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778387972] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:19:46,855 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:19:46,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 26 [2024-11-28 05:19:46,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021310265] [2024-11-28 05:19:46,855 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:19:46,856 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-28 05:19:46,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:19:46,856 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-28 05:19:46,857 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=572, Unknown=0, NotChecked=0, Total=650 [2024-11-28 05:19:46,857 INFO L87 Difference]: Start difference. First operand 466 states and 595 transitions. Second operand has 26 states, 26 states have (on average 3.4615384615384617) internal successors, (90), 26 states have internal predecessors, (90), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-28 05:19:48,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:19:48,374 INFO L93 Difference]: Finished difference Result 735 states and 927 transitions. [2024-11-28 05:19:48,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-11-28 05:19:48,374 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.4615384615384617) internal successors, (90), 26 states have internal predecessors, (90), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 58 [2024-11-28 05:19:48,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:19:48,377 INFO L225 Difference]: With dead ends: 735 [2024-11-28 05:19:48,377 INFO L226 Difference]: Without dead ends: 632 [2024-11-28 05:19:48,378 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=261, Invalid=1995, Unknown=0, NotChecked=0, Total=2256 [2024-11-28 05:19:48,379 INFO L435 NwaCegarLoop]: 84 mSDtfsCounter, 145 mSDsluCounter, 1201 mSDsCounter, 0 mSdLazyCounter, 1198 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 1285 SdHoareTripleChecker+Invalid, 1211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-28 05:19:48,379 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 1285 Invalid, 1211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1198 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-28 05:19:48,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632 states. [2024-11-28 05:19:48,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 474. [2024-11-28 05:19:48,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 474 states, 460 states have (on average 1.2543478260869565) internal successors, (577), 462 states have internal predecessors, (577), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-28 05:19:48,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 596 transitions. [2024-11-28 05:19:48,516 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 596 transitions. Word has length 58 [2024-11-28 05:19:48,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:19:48,517 INFO L471 AbstractCegarLoop]: Abstraction has 474 states and 596 transitions. [2024-11-28 05:19:48,517 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.4615384615384617) internal successors, (90), 26 states have internal predecessors, (90), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-28 05:19:48,517 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 596 transitions. [2024-11-28 05:19:48,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-11-28 05:19:48,518 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:19:48,518 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:19:48,529 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-28 05:19:48,719 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:19:48,719 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:19:48,719 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:19:48,719 INFO L85 PathProgramCache]: Analyzing trace with hash -2108111227, now seen corresponding path program 1 times [2024-11-28 05:19:48,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:19:48,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166547929] [2024-11-28 05:19:48,719 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:19:48,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:19:48,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:19:49,454 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-28 05:19:49,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:19:49,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166547929] [2024-11-28 05:19:49,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166547929] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:19:49,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891772953] [2024-11-28 05:19:49,455 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:19:49,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:19:49,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:19:49,457 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:19:49,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-28 05:19:49,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:19:49,598 INFO L256 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-11-28 05:19:49,601 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:19:49,664 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 8 treesize of output 1 [2024-11-28 05:19:53,888 WARN L873 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_1| Int) (|v_ULTIMATE.start_main_~pat~0#1.base_BEFORE_CALL_1| Int)) (= (select (select |c_#memory_int#1| |v_ULTIMATE.start_main_~pat~0#1.base_BEFORE_CALL_1|) 0) (select (select |c_#memory_int#2| |v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_1|) 0))) is different from true [2024-11-28 05:19:54,057 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 19 treesize of output 11 [2024-11-28 05:19:54,060 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 15 treesize of output 7 [2024-11-28 05:19:54,157 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-28 05:19:54,157 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:19:54,396 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:19:54,396 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 35 treesize of output 38 [2024-11-28 05:19:54,506 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-28 05:19:54,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891772953] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:19:54,506 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:19:54,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 12, 10] total 36 [2024-11-28 05:19:54,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096447651] [2024-11-28 05:19:54,506 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:19:54,507 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-11-28 05:19:54,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:19:54,507 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-11-28 05:19:54,508 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1085, Unknown=1, NotChecked=66, Total=1260 [2024-11-28 05:19:54,508 INFO L87 Difference]: Start difference. First operand 474 states and 596 transitions. Second operand has 36 states, 34 states have (on average 3.088235294117647) internal successors, (105), 36 states have internal predecessors, (105), 8 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) [2024-11-28 05:19:57,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:19:57,521 INFO L93 Difference]: Finished difference Result 912 states and 1142 transitions. [2024-11-28 05:19:57,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2024-11-28 05:19:57,522 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 34 states have (on average 3.088235294117647) internal successors, (105), 36 states have internal predecessors, (105), 8 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) Word has length 60 [2024-11-28 05:19:57,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:19:57,524 INFO L225 Difference]: With dead ends: 912 [2024-11-28 05:19:57,524 INFO L226 Difference]: Without dead ends: 806 [2024-11-28 05:19:57,526 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1309 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=630, Invalid=5073, Unknown=1, NotChecked=148, Total=5852 [2024-11-28 05:19:57,527 INFO L435 NwaCegarLoop]: 58 mSDtfsCounter, 554 mSDsluCounter, 990 mSDsCounter, 0 mSdLazyCounter, 1464 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 558 SdHoareTripleChecker+Valid, 1048 SdHoareTripleChecker+Invalid, 2001 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 476 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-28 05:19:57,527 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [558 Valid, 1048 Invalid, 2001 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1464 Invalid, 0 Unknown, 476 Unchecked, 1.1s Time] [2024-11-28 05:19:57,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 806 states. [2024-11-28 05:19:57,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 806 to 485. [2024-11-28 05:19:57,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 469 states have (on average 1.2260127931769722) internal successors, (575), 471 states have internal predecessors, (575), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-28 05:19:57,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 596 transitions. [2024-11-28 05:19:57,642 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 596 transitions. Word has length 60 [2024-11-28 05:19:57,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:19:57,643 INFO L471 AbstractCegarLoop]: Abstraction has 485 states and 596 transitions. [2024-11-28 05:19:57,643 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 34 states have (on average 3.088235294117647) internal successors, (105), 36 states have internal predecessors, (105), 8 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) [2024-11-28 05:19:57,643 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 596 transitions. [2024-11-28 05:19:57,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-11-28 05:19:57,644 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:19:57,644 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:19:57,655 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-11-28 05:19:57,845 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:19:57,845 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:19:57,845 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:19:57,846 INFO L85 PathProgramCache]: Analyzing trace with hash -425025710, now seen corresponding path program 1 times [2024-11-28 05:19:57,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:19:57,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736251518] [2024-11-28 05:19:57,846 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:19:57,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:19:57,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:19:58,194 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-28 05:19:58,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:19:58,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736251518] [2024-11-28 05:19:58,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736251518] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:19:58,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529823034] [2024-11-28 05:19:58,195 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:19:58,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:19:58,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:19:58,199 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:19:58,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-28 05:19:58,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:19:58,453 INFO L256 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-11-28 05:19:58,455 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:19:58,988 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-28 05:19:58,988 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:19:59,560 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-28 05:19:59,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529823034] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:19:59,560 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:19:59,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 18, 15] total 36 [2024-11-28 05:19:59,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027826827] [2024-11-28 05:19:59,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:19:59,561 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-11-28 05:19:59,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:19:59,561 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-11-28 05:19:59,562 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1085, Unknown=0, NotChecked=0, Total=1260 [2024-11-28 05:19:59,562 INFO L87 Difference]: Start difference. First operand 485 states and 596 transitions. Second operand has 36 states, 36 states have (on average 2.5) internal successors, (90), 35 states have internal predecessors, (90), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-28 05:20:00,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:20:00,644 INFO L93 Difference]: Finished difference Result 690 states and 835 transitions. [2024-11-28 05:20:00,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-28 05:20:00,645 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.5) internal successors, (90), 35 states have internal predecessors, (90), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 59 [2024-11-28 05:20:00,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:20:00,647 INFO L225 Difference]: With dead ends: 690 [2024-11-28 05:20:00,647 INFO L226 Difference]: Without dead ends: 560 [2024-11-28 05:20:00,648 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 91 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=367, Invalid=1703, Unknown=0, NotChecked=0, Total=2070 [2024-11-28 05:20:00,649 INFO L435 NwaCegarLoop]: 50 mSDtfsCounter, 526 mSDsluCounter, 956 mSDsCounter, 0 mSdLazyCounter, 883 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 533 SdHoareTripleChecker+Valid, 1006 SdHoareTripleChecker+Invalid, 919 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 883 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-28 05:20:00,649 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [533 Valid, 1006 Invalid, 919 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 883 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-28 05:20:00,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2024-11-28 05:20:00,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 444. [2024-11-28 05:20:00,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 428 states have (on average 1.2172897196261683) internal successors, (521), 430 states have internal predecessors, (521), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-28 05:20:00,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 542 transitions. [2024-11-28 05:20:00,772 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 542 transitions. Word has length 59 [2024-11-28 05:20:00,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:20:00,772 INFO L471 AbstractCegarLoop]: Abstraction has 444 states and 542 transitions. [2024-11-28 05:20:00,773 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.5) internal successors, (90), 35 states have internal predecessors, (90), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-28 05:20:00,773 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 542 transitions. [2024-11-28 05:20:00,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-11-28 05:20:00,774 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:20:00,774 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:20:00,783 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-11-28 05:20:00,978 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2024-11-28 05:20:00,978 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:20:00,978 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:20:00,978 INFO L85 PathProgramCache]: Analyzing trace with hash 1671498038, now seen corresponding path program 2 times [2024-11-28 05:20:00,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:20:00,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831166060] [2024-11-28 05:20:00,979 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:20:00,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:20:01,024 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:20:01,024 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:20:01,438 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-28 05:20:01,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:20:01,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831166060] [2024-11-28 05:20:01,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831166060] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:20:01,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927167437] [2024-11-28 05:20:01,439 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:20:01,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:20:01,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:20:01,441 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:20:01,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-28 05:20:01,586 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:20:01,587 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:20:01,589 INFO L256 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-28 05:20:01,591 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:20:02,052 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-28 05:20:02,052 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:20:02,751 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 5 proven. 21 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-28 05:20:02,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927167437] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:20:02,751 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:20:02,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 34 [2024-11-28 05:20:02,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835559619] [2024-11-28 05:20:02,751 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:20:02,752 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-28 05:20:02,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:20:02,752 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-28 05:20:02,753 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=989, Unknown=0, NotChecked=0, Total=1122 [2024-11-28 05:20:02,753 INFO L87 Difference]: Start difference. First operand 444 states and 542 transitions. Second operand has 34 states, 34 states have (on average 3.2058823529411766) internal successors, (109), 33 states have internal predecessors, (109), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-28 05:20:04,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:20:04,607 INFO L93 Difference]: Finished difference Result 727 states and 893 transitions. [2024-11-28 05:20:04,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-28 05:20:04,607 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.2058823529411766) internal successors, (109), 33 states have internal predecessors, (109), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 61 [2024-11-28 05:20:04,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:20:04,610 INFO L225 Difference]: With dead ends: 727 [2024-11-28 05:20:04,610 INFO L226 Difference]: Without dead ends: 714 [2024-11-28 05:20:04,611 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 100 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 663 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=384, Invalid=2696, Unknown=0, NotChecked=0, Total=3080 [2024-11-28 05:20:04,612 INFO L435 NwaCegarLoop]: 91 mSDtfsCounter, 165 mSDsluCounter, 1569 mSDsCounter, 0 mSdLazyCounter, 1440 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 1660 SdHoareTripleChecker+Invalid, 1457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-28 05:20:04,612 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 1660 Invalid, 1457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1440 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-28 05:20:04,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2024-11-28 05:20:04,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 464. [2024-11-28 05:20:04,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 448 states have (on average 1.21875) internal successors, (546), 450 states have internal predecessors, (546), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-28 05:20:04,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 567 transitions. [2024-11-28 05:20:04,761 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 567 transitions. Word has length 61 [2024-11-28 05:20:04,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:20:04,762 INFO L471 AbstractCegarLoop]: Abstraction has 464 states and 567 transitions. [2024-11-28 05:20:04,762 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.2058823529411766) internal successors, (109), 33 states have internal predecessors, (109), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-28 05:20:04,762 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 567 transitions. [2024-11-28 05:20:04,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-11-28 05:20:04,763 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:20:04,763 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:20:04,774 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-11-28 05:20:04,968 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2024-11-28 05:20:04,968 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:20:04,968 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:20:04,969 INFO L85 PathProgramCache]: Analyzing trace with hash 2094815019, now seen corresponding path program 1 times [2024-11-28 05:20:04,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:20:04,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204518560] [2024-11-28 05:20:04,969 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:20:04,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:20:05,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:20:06,054 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-28 05:20:06,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:20:06,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204518560] [2024-11-28 05:20:06,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204518560] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:20:06,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271682758] [2024-11-28 05:20:06,055 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:20:06,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:20:06,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:20:06,058 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:20:06,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-28 05:20:06,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:20:06,206 INFO L256 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 53 conjuncts are in the unsatisfiable core [2024-11-28 05:20:06,209 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:20:06,237 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 05:20:06,750 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 19 treesize of output 11 [2024-11-28 05:20:06,752 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 15 treesize of output 7 [2024-11-28 05:20:06,784 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-28 05:20:06,784 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:20:07,029 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:20:07,030 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 37 treesize of output 41 [2024-11-28 05:20:07,217 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-28 05:20:07,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271682758] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:20:07,217 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:20:07,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 13] total 29 [2024-11-28 05:20:07,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031229169] [2024-11-28 05:20:07,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:20:07,218 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-28 05:20:07,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:20:07,218 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-28 05:20:07,219 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2024-11-28 05:20:07,219 INFO L87 Difference]: Start difference. First operand 464 states and 567 transitions. Second operand has 29 states, 28 states have (on average 3.4642857142857144) internal successors, (97), 27 states have internal predecessors, (97), 6 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2024-11-28 05:20:08,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:20:08,594 INFO L93 Difference]: Finished difference Result 834 states and 1033 transitions. [2024-11-28 05:20:08,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-28 05:20:08,595 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 3.4642857142857144) internal successors, (97), 27 states have internal predecessors, (97), 6 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 65 [2024-11-28 05:20:08,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:20:08,598 INFO L225 Difference]: With dead ends: 834 [2024-11-28 05:20:08,598 INFO L226 Difference]: Without dead ends: 659 [2024-11-28 05:20:08,599 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 114 SyntacticMatches, 5 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=178, Invalid=1154, Unknown=0, NotChecked=0, Total=1332 [2024-11-28 05:20:08,600 INFO L435 NwaCegarLoop]: 77 mSDtfsCounter, 118 mSDsluCounter, 1115 mSDsCounter, 0 mSdLazyCounter, 994 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 1192 SdHoareTripleChecker+Invalid, 1016 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 994 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-28 05:20:08,600 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 1192 Invalid, 1016 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 994 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-28 05:20:08,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 659 states. [2024-11-28 05:20:08,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 659 to 625. [2024-11-28 05:20:08,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 625 states, 598 states have (on average 1.225752508361204) internal successors, (733), 604 states have internal predecessors, (733), 19 states have call successors, (19), 7 states have call predecessors, (19), 7 states have return successors, (17), 13 states have call predecessors, (17), 17 states have call successors, (17) [2024-11-28 05:20:08,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 769 transitions. [2024-11-28 05:20:08,865 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 769 transitions. Word has length 65 [2024-11-28 05:20:08,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:20:08,865 INFO L471 AbstractCegarLoop]: Abstraction has 625 states and 769 transitions. [2024-11-28 05:20:08,866 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 3.4642857142857144) internal successors, (97), 27 states have internal predecessors, (97), 6 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2024-11-28 05:20:08,866 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 769 transitions. [2024-11-28 05:20:08,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-11-28 05:20:08,867 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:20:08,867 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:20:08,878 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-11-28 05:20:09,072 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2024-11-28 05:20:09,072 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:20:09,073 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:20:09,073 INFO L85 PathProgramCache]: Analyzing trace with hash -1825598896, now seen corresponding path program 3 times [2024-11-28 05:20:09,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:20:09,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796415459] [2024-11-28 05:20:09,073 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:20:09,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:20:09,194 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-28 05:20:09,194 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:20:16,818 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-28 05:20:16,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:20:16,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796415459] [2024-11-28 05:20:16,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796415459] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:20:16,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667482437] [2024-11-28 05:20:16,818 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:20:16,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:20:16,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:20:16,820 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:20:16,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-28 05:20:17,624 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-28 05:20:17,624 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:20:17,627 INFO L256 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 79 conjuncts are in the unsatisfiable core [2024-11-28 05:20:17,631 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:20:17,806 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 05:20:17,961 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 05:20:18,022 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 19 treesize of output 1 [2024-11-28 05:20:19,184 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 20 treesize of output 12 [2024-11-28 05:20:19,188 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 16 treesize of output 8 [2024-11-28 05:20:19,255 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 5 proven. 39 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-28 05:20:19,255 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:20:20,665 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 2 proven. 24 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-28 05:20:20,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667482437] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:20:20,666 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:20:20,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 23, 18] total 69 [2024-11-28 05:20:20,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138435336] [2024-11-28 05:20:20,666 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:20:20,666 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2024-11-28 05:20:20,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:20:20,667 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2024-11-28 05:20:20,668 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=354, Invalid=4338, Unknown=0, NotChecked=0, Total=4692 [2024-11-28 05:20:20,668 INFO L87 Difference]: Start difference. First operand 625 states and 769 transitions. Second operand has 69 states, 67 states have (on average 2.2388059701492535) internal successors, (150), 66 states have internal predecessors, (150), 5 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-28 05:20:33,240 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-28 05:20:44,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:20:44,233 INFO L93 Difference]: Finished difference Result 1672 states and 2053 transitions. [2024-11-28 05:20:44,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2024-11-28 05:20:44,236 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 67 states have (on average 2.2388059701492535) internal successors, (150), 66 states have internal predecessors, (150), 5 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 65 [2024-11-28 05:20:44,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:20:44,243 INFO L225 Difference]: With dead ends: 1672 [2024-11-28 05:20:44,243 INFO L226 Difference]: Without dead ends: 1595 [2024-11-28 05:20:44,247 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4856 ImplicationChecksByTransitivity, 19.2s TimeCoverageRelationStatistics Valid=1928, Invalid=17254, Unknown=0, NotChecked=0, Total=19182 [2024-11-28 05:20:44,248 INFO L435 NwaCegarLoop]: 46 mSDtfsCounter, 535 mSDsluCounter, 1459 mSDsCounter, 0 mSdLazyCounter, 3182 mSolverCounterSat, 47 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 543 SdHoareTripleChecker+Valid, 1505 SdHoareTripleChecker+Invalid, 3230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 3182 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.3s IncrementalHoareTripleChecker+Time [2024-11-28 05:20:44,248 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [543 Valid, 1505 Invalid, 3230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 3182 Invalid, 1 Unknown, 0 Unchecked, 8.3s Time] [2024-11-28 05:20:44,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1595 states. [2024-11-28 05:20:44,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1595 to 639. [2024-11-28 05:20:44,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 639 states, 612 states have (on average 1.223856209150327) internal successors, (749), 618 states have internal predecessors, (749), 19 states have call successors, (19), 7 states have call predecessors, (19), 7 states have return successors, (17), 13 states have call predecessors, (17), 17 states have call successors, (17) [2024-11-28 05:20:44,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 785 transitions. [2024-11-28 05:20:44,479 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 785 transitions. Word has length 65 [2024-11-28 05:20:44,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:20:44,479 INFO L471 AbstractCegarLoop]: Abstraction has 639 states and 785 transitions. [2024-11-28 05:20:44,479 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 67 states have (on average 2.2388059701492535) internal successors, (150), 66 states have internal predecessors, (150), 5 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-28 05:20:44,479 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 785 transitions. [2024-11-28 05:20:44,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-11-28 05:20:44,481 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:20:44,481 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:20:44,492 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-11-28 05:20:44,681 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2024-11-28 05:20:44,682 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:20:44,682 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:20:44,682 INFO L85 PathProgramCache]: Analyzing trace with hash -824057008, now seen corresponding path program 4 times [2024-11-28 05:20:44,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:20:44,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091650891] [2024-11-28 05:20:44,682 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 05:20:44,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:20:44,721 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 05:20:44,721 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:20:45,875 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 5 proven. 21 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-28 05:20:45,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:20:45,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091650891] [2024-11-28 05:20:45,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091650891] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:20:45,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034766019] [2024-11-28 05:20:45,876 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 05:20:45,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:20:45,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:20:45,878 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:20:45,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-28 05:20:46,034 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 05:20:46,034 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:20:46,035 INFO L256 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 71 conjuncts are in the unsatisfiable core [2024-11-28 05:20:46,040 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:20:46,093 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 19 treesize of output 1 [2024-11-28 05:20:46,135 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 19 treesize of output 1 [2024-11-28 05:20:46,158 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 23 treesize of output 1 [2024-11-28 05:20:46,754 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 26 treesize of output 14 [2024-11-28 05:20:46,757 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 20 treesize of output 8 [2024-11-28 05:20:46,790 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 5 proven. 39 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-28 05:20:46,790 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:20:47,949 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 4 proven. 22 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-28 05:20:47,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034766019] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:20:47,949 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:20:47,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 21, 18] total 49 [2024-11-28 05:20:47,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088954474] [2024-11-28 05:20:47,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:20:47,950 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-11-28 05:20:47,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:20:47,951 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-11-28 05:20:47,951 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=2138, Unknown=0, NotChecked=0, Total=2352 [2024-11-28 05:20:47,951 INFO L87 Difference]: Start difference. First operand 639 states and 785 transitions. Second operand has 49 states, 49 states have (on average 2.7142857142857144) internal successors, (133), 48 states have internal predecessors, (133), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-28 05:20:50,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:20:50,670 INFO L93 Difference]: Finished difference Result 826 states and 1017 transitions. [2024-11-28 05:20:50,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-28 05:20:50,671 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.7142857142857144) internal successors, (133), 48 states have internal predecessors, (133), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 65 [2024-11-28 05:20:50,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:20:50,673 INFO L225 Difference]: With dead ends: 826 [2024-11-28 05:20:50,673 INFO L226 Difference]: Without dead ends: 749 [2024-11-28 05:20:50,673 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1096 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=462, Invalid=4368, Unknown=0, NotChecked=0, Total=4830 [2024-11-28 05:20:50,674 INFO L435 NwaCegarLoop]: 69 mSDtfsCounter, 155 mSDsluCounter, 1688 mSDsCounter, 0 mSdLazyCounter, 1989 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 1757 SdHoareTripleChecker+Invalid, 1998 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1989 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-11-28 05:20:50,674 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 1757 Invalid, 1998 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1989 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-11-28 05:20:50,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2024-11-28 05:20:50,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 647. [2024-11-28 05:20:50,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 647 states, 620 states have (on average 1.2241935483870967) internal successors, (759), 626 states have internal predecessors, (759), 19 states have call successors, (19), 7 states have call predecessors, (19), 7 states have return successors, (17), 13 states have call predecessors, (17), 17 states have call successors, (17) [2024-11-28 05:20:50,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 647 states to 647 states and 795 transitions. [2024-11-28 05:20:50,925 INFO L78 Accepts]: Start accepts. Automaton has 647 states and 795 transitions. Word has length 65 [2024-11-28 05:20:50,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:20:50,925 INFO L471 AbstractCegarLoop]: Abstraction has 647 states and 795 transitions. [2024-11-28 05:20:50,925 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.7142857142857144) internal successors, (133), 48 states have internal predecessors, (133), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-28 05:20:50,926 INFO L276 IsEmpty]: Start isEmpty. Operand 647 states and 795 transitions. [2024-11-28 05:20:50,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-11-28 05:20:50,927 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:20:50,927 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:20:50,937 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-11-28 05:20:51,127 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2024-11-28 05:20:51,128 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:20:51,128 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:20:51,128 INFO L85 PathProgramCache]: Analyzing trace with hash -1078306468, now seen corresponding path program 5 times [2024-11-28 05:20:51,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:20:51,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824699519] [2024-11-28 05:20:51,128 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 05:20:51,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:20:51,189 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-28 05:20:51,190 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:20:52,354 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 5 proven. 30 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-28 05:20:52,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:20:52,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824699519] [2024-11-28 05:20:52,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824699519] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:20:52,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150419269] [2024-11-28 05:20:52,355 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 05:20:52,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:20:52,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:20:52,359 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:20:52,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-28 05:20:52,579 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-28 05:20:52,579 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:20:52,582 INFO L256 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 76 conjuncts are in the unsatisfiable core [2024-11-28 05:20:52,586 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:20:52,707 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 05:20:52,813 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 05:20:52,855 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 05:20:53,814 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 20 treesize of output 12 [2024-11-28 05:20:53,816 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 16 treesize of output 8 [2024-11-28 05:20:53,851 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 5 proven. 39 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-28 05:20:53,851 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:20:55,070 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 4 proven. 22 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-28 05:20:55,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150419269] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:20:55,071 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:20:55,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 22, 18] total 52 [2024-11-28 05:20:55,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456964543] [2024-11-28 05:20:55,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:20:55,071 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2024-11-28 05:20:55,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:20:55,072 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2024-11-28 05:20:55,072 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=2385, Unknown=0, NotChecked=0, Total=2652 [2024-11-28 05:20:55,072 INFO L87 Difference]: Start difference. First operand 647 states and 795 transitions. Second operand has 52 states, 52 states have (on average 2.576923076923077) internal successors, (134), 51 states have internal predecessors, (134), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-28 05:20:56,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:20:56,932 INFO L93 Difference]: Finished difference Result 834 states and 1029 transitions. [2024-11-28 05:20:56,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-28 05:20:56,933 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.576923076923077) internal successors, (134), 51 states have internal predecessors, (134), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 65 [2024-11-28 05:20:56,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:20:56,935 INFO L225 Difference]: With dead ends: 834 [2024-11-28 05:20:56,935 INFO L226 Difference]: Without dead ends: 757 [2024-11-28 05:20:56,935 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 803 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=394, Invalid=3146, Unknown=0, NotChecked=0, Total=3540 [2024-11-28 05:20:56,936 INFO L435 NwaCegarLoop]: 65 mSDtfsCounter, 114 mSDsluCounter, 1338 mSDsCounter, 0 mSdLazyCounter, 1643 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 1403 SdHoareTripleChecker+Invalid, 1654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1643 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-11-28 05:20:56,936 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 1403 Invalid, 1654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1643 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-11-28 05:20:56,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 757 states. [2024-11-28 05:20:57,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 757 to 683. [2024-11-28 05:20:57,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 683 states, 656 states have (on average 1.2195121951219512) internal successors, (800), 662 states have internal predecessors, (800), 19 states have call successors, (19), 7 states have call predecessors, (19), 7 states have return successors, (17), 13 states have call predecessors, (17), 17 states have call successors, (17) [2024-11-28 05:20:57,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 836 transitions. [2024-11-28 05:20:57,253 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 836 transitions. Word has length 65 [2024-11-28 05:20:57,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:20:57,254 INFO L471 AbstractCegarLoop]: Abstraction has 683 states and 836 transitions. [2024-11-28 05:20:57,254 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.576923076923077) internal successors, (134), 51 states have internal predecessors, (134), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-28 05:20:57,254 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 836 transitions. [2024-11-28 05:20:57,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2024-11-28 05:20:57,256 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:20:57,256 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:20:57,267 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-11-28 05:20:57,456 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-11-28 05:20:57,457 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:20:57,457 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:20:57,457 INFO L85 PathProgramCache]: Analyzing trace with hash -1040946772, now seen corresponding path program 2 times [2024-11-28 05:20:57,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:20:57,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587985605] [2024-11-28 05:20:57,457 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:20:57,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:20:57,501 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:20:57,501 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:20:57,948 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 7 proven. 24 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-28 05:20:57,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:20:57,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587985605] [2024-11-28 05:20:57,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587985605] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:20:57,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336573593] [2024-11-28 05:20:57,948 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:20:57,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:20:57,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:20:57,950 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:20:57,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-11-28 05:20:58,104 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:20:58,104 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:20:58,105 INFO L256 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-28 05:20:58,107 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:20:58,350 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 7 proven. 33 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-28 05:20:58,350 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:20:58,711 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 7 proven. 24 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-28 05:20:58,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336573593] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:20:58,711 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:20:58,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15, 12] total 28 [2024-11-28 05:20:58,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93932771] [2024-11-28 05:20:58,712 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:20:58,712 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-28 05:20:58,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:20:58,713 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-28 05:20:58,713 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=671, Unknown=0, NotChecked=0, Total=756 [2024-11-28 05:20:58,713 INFO L87 Difference]: Start difference. First operand 683 states and 836 transitions. Second operand has 28 states, 28 states have (on average 3.392857142857143) internal successors, (95), 28 states have internal predecessors, (95), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-28 05:20:59,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:20:59,776 INFO L93 Difference]: Finished difference Result 1599 states and 1985 transitions. [2024-11-28 05:20:59,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-28 05:20:59,777 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.392857142857143) internal successors, (95), 28 states have internal predecessors, (95), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 69 [2024-11-28 05:20:59,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:20:59,780 INFO L225 Difference]: With dead ends: 1599 [2024-11-28 05:20:59,780 INFO L226 Difference]: Without dead ends: 1153 [2024-11-28 05:20:59,781 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 121 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=135, Invalid=921, Unknown=0, NotChecked=0, Total=1056 [2024-11-28 05:20:59,781 INFO L435 NwaCegarLoop]: 55 mSDtfsCounter, 98 mSDsluCounter, 920 mSDsCounter, 0 mSdLazyCounter, 773 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 975 SdHoareTripleChecker+Invalid, 775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 773 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-28 05:20:59,781 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 975 Invalid, 775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 773 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-28 05:20:59,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1153 states. [2024-11-28 05:20:59,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1153 to 747. [2024-11-28 05:20:59,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 747 states, 720 states have (on average 1.2236111111111112) internal successors, (881), 726 states have internal predecessors, (881), 19 states have call successors, (19), 7 states have call predecessors, (19), 7 states have return successors, (17), 13 states have call predecessors, (17), 17 states have call successors, (17) [2024-11-28 05:20:59,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 747 states to 747 states and 917 transitions. [2024-11-28 05:20:59,992 INFO L78 Accepts]: Start accepts. Automaton has 747 states and 917 transitions. Word has length 69 [2024-11-28 05:20:59,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:20:59,992 INFO L471 AbstractCegarLoop]: Abstraction has 747 states and 917 transitions. [2024-11-28 05:20:59,992 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.392857142857143) internal successors, (95), 28 states have internal predecessors, (95), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-28 05:20:59,992 INFO L276 IsEmpty]: Start isEmpty. Operand 747 states and 917 transitions. [2024-11-28 05:20:59,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-11-28 05:20:59,993 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:20:59,994 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:21:00,004 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2024-11-28 05:21:00,194 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-11-28 05:21:00,194 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:21:00,194 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:21:00,194 INFO L85 PathProgramCache]: Analyzing trace with hash -343850470, now seen corresponding path program 3 times [2024-11-28 05:21:00,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:21:00,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312265346] [2024-11-28 05:21:00,195 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:21:00,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:21:00,273 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-28 05:21:00,274 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:21:03,736 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-11-28 05:21:03,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:21:03,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312265346] [2024-11-28 05:21:03,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312265346] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:21:03,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590998176] [2024-11-28 05:21:03,736 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:21:03,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:21:03,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:21:03,739 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:21:03,741 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-11-28 05:21:03,967 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-28 05:21:03,967 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:21:03,969 INFO L256 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 67 conjuncts are in the unsatisfiable core [2024-11-28 05:21:03,972 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:21:04,569 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 05:21:06,527 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 20 treesize of output 12 [2024-11-28 05:21:06,531 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 16 treesize of output 8 [2024-11-28 05:21:06,606 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 5 proven. 37 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-28 05:21:06,606 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:21:07,541 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:21:07,541 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 39 treesize of output 42 [2024-11-28 05:21:08,412 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-11-28 05:21:08,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590998176] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:21:08,413 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:21:08,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22, 14] total 51 [2024-11-28 05:21:08,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653870911] [2024-11-28 05:21:08,413 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:21:08,414 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-11-28 05:21:08,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:21:08,414 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-11-28 05:21:08,415 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=2303, Unknown=0, NotChecked=0, Total=2550 [2024-11-28 05:21:08,415 INFO L87 Difference]: Start difference. First operand 747 states and 917 transitions. Second operand has 51 states, 51 states have (on average 2.843137254901961) internal successors, (145), 50 states have internal predecessors, (145), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-28 05:21:16,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:21:16,785 INFO L93 Difference]: Finished difference Result 1335 states and 1662 transitions. [2024-11-28 05:21:16,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2024-11-28 05:21:16,786 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.843137254901961) internal successors, (145), 50 states have internal predecessors, (145), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 70 [2024-11-28 05:21:16,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:21:16,790 INFO L225 Difference]: With dead ends: 1335 [2024-11-28 05:21:16,790 INFO L226 Difference]: Without dead ends: 1218 [2024-11-28 05:21:16,791 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1278 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=748, Invalid=5732, Unknown=0, NotChecked=0, Total=6480 [2024-11-28 05:21:16,792 INFO L435 NwaCegarLoop]: 89 mSDtfsCounter, 289 mSDsluCounter, 1666 mSDsCounter, 0 mSdLazyCounter, 3199 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 1755 SdHoareTripleChecker+Invalid, 3240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 3199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2024-11-28 05:21:16,792 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [292 Valid, 1755 Invalid, 3240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 3199 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2024-11-28 05:21:16,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1218 states. [2024-11-28 05:21:17,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1218 to 802. [2024-11-28 05:21:17,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 802 states, 775 states have (on average 1.2270967741935483) internal successors, (951), 781 states have internal predecessors, (951), 19 states have call successors, (19), 7 states have call predecessors, (19), 7 states have return successors, (17), 13 states have call predecessors, (17), 17 states have call successors, (17) [2024-11-28 05:21:17,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 802 states to 802 states and 987 transitions. [2024-11-28 05:21:17,038 INFO L78 Accepts]: Start accepts. Automaton has 802 states and 987 transitions. Word has length 70 [2024-11-28 05:21:17,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:21:17,038 INFO L471 AbstractCegarLoop]: Abstraction has 802 states and 987 transitions. [2024-11-28 05:21:17,038 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.843137254901961) internal successors, (145), 50 states have internal predecessors, (145), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-28 05:21:17,039 INFO L276 IsEmpty]: Start isEmpty. Operand 802 states and 987 transitions. [2024-11-28 05:21:17,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-11-28 05:21:17,040 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:21:17,040 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:21:17,050 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2024-11-28 05:21:17,240 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-11-28 05:21:17,241 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:21:17,241 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:21:17,241 INFO L85 PathProgramCache]: Analyzing trace with hash -49061426, now seen corresponding path program 6 times [2024-11-28 05:21:17,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:21:17,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18406272] [2024-11-28 05:21:17,241 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 05:21:17,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:21:17,308 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-11-28 05:21:17,309 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:21:18,635 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-28 05:21:18,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:21:18,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18406272] [2024-11-28 05:21:18,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18406272] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:21:18,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587346996] [2024-11-28 05:21:18,635 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 05:21:18,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:21:18,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:21:18,637 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:21:18,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-11-28 05:21:19,289 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-11-28 05:21:19,289 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:21:19,291 INFO L256 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-28 05:21:19,293 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:21:19,825 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 7 proven. 39 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-28 05:21:19,825 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:21:20,525 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 7 proven. 24 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-28 05:21:20,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587346996] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:21:20,525 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:21:20,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 15, 12] total 39 [2024-11-28 05:21:20,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904922723] [2024-11-28 05:21:20,525 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:21:20,525 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-11-28 05:21:20,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:21:20,526 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-11-28 05:21:20,526 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1359, Unknown=0, NotChecked=0, Total=1482 [2024-11-28 05:21:20,526 INFO L87 Difference]: Start difference. First operand 802 states and 987 transitions. Second operand has 39 states, 39 states have (on average 3.2051282051282053) internal successors, (125), 39 states have internal predecessors, (125), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-28 05:21:23,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:21:23,075 INFO L93 Difference]: Finished difference Result 1375 states and 1702 transitions. [2024-11-28 05:21:23,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-28 05:21:23,076 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.2051282051282053) internal successors, (125), 39 states have internal predecessors, (125), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 71 [2024-11-28 05:21:23,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:21:23,079 INFO L225 Difference]: With dead ends: 1375 [2024-11-28 05:21:23,079 INFO L226 Difference]: Without dead ends: 1140 [2024-11-28 05:21:23,080 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 118 SyntacticMatches, 6 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 570 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=275, Invalid=2695, Unknown=0, NotChecked=0, Total=2970 [2024-11-28 05:21:23,080 INFO L435 NwaCegarLoop]: 57 mSDtfsCounter, 217 mSDsluCounter, 1252 mSDsCounter, 0 mSdLazyCounter, 1286 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 1309 SdHoareTripleChecker+Invalid, 1297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-28 05:21:23,080 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [221 Valid, 1309 Invalid, 1297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1286 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-28 05:21:23,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1140 states. [2024-11-28 05:21:23,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1140 to 681. [2024-11-28 05:21:23,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 681 states, 654 states have (on average 1.2140672782874617) internal successors, (794), 660 states have internal predecessors, (794), 19 states have call successors, (19), 7 states have call predecessors, (19), 7 states have return successors, (17), 13 states have call predecessors, (17), 17 states have call successors, (17) [2024-11-28 05:21:23,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 681 states to 681 states and 830 transitions. [2024-11-28 05:21:23,311 INFO L78 Accepts]: Start accepts. Automaton has 681 states and 830 transitions. Word has length 71 [2024-11-28 05:21:23,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:21:23,312 INFO L471 AbstractCegarLoop]: Abstraction has 681 states and 830 transitions. [2024-11-28 05:21:23,312 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.2051282051282053) internal successors, (125), 39 states have internal predecessors, (125), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-28 05:21:23,312 INFO L276 IsEmpty]: Start isEmpty. Operand 681 states and 830 transitions. [2024-11-28 05:21:23,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-11-28 05:21:23,313 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:21:23,313 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:21:23,324 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2024-11-28 05:21:23,513 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-11-28 05:21:23,514 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:21:23,514 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:21:23,514 INFO L85 PathProgramCache]: Analyzing trace with hash -312168585, now seen corresponding path program 1 times [2024-11-28 05:21:23,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:21:23,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091077836] [2024-11-28 05:21:23,514 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:21:23,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:21:23,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:21:23,793 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-28 05:21:23,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:21:23,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091077836] [2024-11-28 05:21:23,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091077836] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:21:23,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336367199] [2024-11-28 05:21:23,794 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:21:23,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:21:23,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:21:23,796 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:21:23,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-11-28 05:21:23,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:21:23,953 INFO L256 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-28 05:21:23,955 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:21:24,263 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 18 proven. 13 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-28 05:21:24,263 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:21:24,612 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2024-11-28 05:21:24,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336367199] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:21:24,613 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:21:24,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 27 [2024-11-28 05:21:24,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581896148] [2024-11-28 05:21:24,613 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:21:24,613 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-28 05:21:24,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:21:24,614 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-28 05:21:24,614 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2024-11-28 05:21:24,614 INFO L87 Difference]: Start difference. First operand 681 states and 830 transitions. Second operand has 27 states, 27 states have (on average 4.0) internal successors, (108), 27 states have internal predecessors, (108), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2024-11-28 05:21:30,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:21:30,066 INFO L93 Difference]: Finished difference Result 1012 states and 1229 transitions. [2024-11-28 05:21:30,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-28 05:21:30,066 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 4.0) internal successors, (108), 27 states have internal predecessors, (108), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) Word has length 74 [2024-11-28 05:21:30,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:21:30,070 INFO L225 Difference]: With dead ends: 1012 [2024-11-28 05:21:30,070 INFO L226 Difference]: Without dead ends: 937 [2024-11-28 05:21:30,071 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 133 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=180, Invalid=1460, Unknown=0, NotChecked=0, Total=1640 [2024-11-28 05:21:30,071 INFO L435 NwaCegarLoop]: 80 mSDtfsCounter, 288 mSDsluCounter, 1111 mSDsCounter, 0 mSdLazyCounter, 789 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 1191 SdHoareTripleChecker+Invalid, 827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 789 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-28 05:21:30,073 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [292 Valid, 1191 Invalid, 827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 789 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-28 05:21:30,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 937 states. [2024-11-28 05:21:30,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 937 to 700. [2024-11-28 05:21:30,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 700 states, 673 states have (on average 1.2065378900445765) internal successors, (812), 679 states have internal predecessors, (812), 19 states have call successors, (19), 7 states have call predecessors, (19), 7 states have return successors, (17), 13 states have call predecessors, (17), 17 states have call successors, (17) [2024-11-28 05:21:30,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 700 states to 700 states and 848 transitions. [2024-11-28 05:21:30,322 INFO L78 Accepts]: Start accepts. Automaton has 700 states and 848 transitions. Word has length 74 [2024-11-28 05:21:30,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:21:30,322 INFO L471 AbstractCegarLoop]: Abstraction has 700 states and 848 transitions. [2024-11-28 05:21:30,322 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.0) internal successors, (108), 27 states have internal predecessors, (108), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2024-11-28 05:21:30,322 INFO L276 IsEmpty]: Start isEmpty. Operand 700 states and 848 transitions. [2024-11-28 05:21:30,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-11-28 05:21:30,323 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:21:30,323 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:21:30,330 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2024-11-28 05:21:30,523 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:21:30,524 INFO L396 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:21:30,524 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:21:30,524 INFO L85 PathProgramCache]: Analyzing trace with hash -479849038, now seen corresponding path program 7 times [2024-11-28 05:21:30,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:21:30,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015989952] [2024-11-28 05:21:30,524 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 05:21:30,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:21:30,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:21:31,154 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-28 05:21:31,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:21:31,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015989952] [2024-11-28 05:21:31,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015989952] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:21:31,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544222206] [2024-11-28 05:21:31,155 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 05:21:31,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:21:31,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:21:31,157 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:21:31,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-11-28 05:21:31,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:21:31,327 INFO L256 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-28 05:21:31,329 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:21:31,863 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-28 05:21:31,863 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:21:32,713 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-28 05:21:32,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544222206] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:21:32,713 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:21:32,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 39 [2024-11-28 05:21:32,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314640101] [2024-11-28 05:21:32,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:21:32,714 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-11-28 05:21:32,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:21:32,715 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-11-28 05:21:32,715 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1331, Unknown=0, NotChecked=0, Total=1482 [2024-11-28 05:21:32,715 INFO L87 Difference]: Start difference. First operand 700 states and 848 transitions. Second operand has 39 states, 39 states have (on average 3.1538461538461537) internal successors, (123), 39 states have internal predecessors, (123), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-28 05:21:35,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:21:35,355 INFO L93 Difference]: Finished difference Result 1286 states and 1570 transitions. [2024-11-28 05:21:35,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-28 05:21:35,356 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.1538461538461537) internal successors, (123), 39 states have internal predecessors, (123), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 73 [2024-11-28 05:21:35,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:21:35,358 INFO L225 Difference]: With dead ends: 1286 [2024-11-28 05:21:35,359 INFO L226 Difference]: Without dead ends: 1202 [2024-11-28 05:21:35,359 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 126 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 755 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=308, Invalid=2662, Unknown=0, NotChecked=0, Total=2970 [2024-11-28 05:21:35,360 INFO L435 NwaCegarLoop]: 123 mSDtfsCounter, 143 mSDsluCounter, 2606 mSDsCounter, 0 mSdLazyCounter, 1550 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 2729 SdHoareTripleChecker+Invalid, 1581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-11-28 05:21:35,360 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 2729 Invalid, 1581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1550 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-11-28 05:21:35,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1202 states. [2024-11-28 05:21:35,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1202 to 741. [2024-11-28 05:21:35,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 741 states, 714 states have (on average 1.2030812324929971) internal successors, (859), 720 states have internal predecessors, (859), 19 states have call successors, (19), 7 states have call predecessors, (19), 7 states have return successors, (17), 13 states have call predecessors, (17), 17 states have call successors, (17) [2024-11-28 05:21:35,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 741 states to 741 states and 895 transitions. [2024-11-28 05:21:35,580 INFO L78 Accepts]: Start accepts. Automaton has 741 states and 895 transitions. Word has length 73 [2024-11-28 05:21:35,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:21:35,580 INFO L471 AbstractCegarLoop]: Abstraction has 741 states and 895 transitions. [2024-11-28 05:21:35,580 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.1538461538461537) internal successors, (123), 39 states have internal predecessors, (123), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-28 05:21:35,580 INFO L276 IsEmpty]: Start isEmpty. Operand 741 states and 895 transitions. [2024-11-28 05:21:35,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2024-11-28 05:21:35,582 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:21:35,582 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:21:35,592 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2024-11-28 05:21:35,782 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:21:35,782 INFO L396 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:21:35,783 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:21:35,783 INFO L85 PathProgramCache]: Analyzing trace with hash 614535123, now seen corresponding path program 2 times [2024-11-28 05:21:35,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:21:35,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991465640] [2024-11-28 05:21:35,783 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:21:35,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:21:35,819 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:21:35,819 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:21:37,084 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 2 proven. 24 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-28 05:21:37,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:21:37,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991465640] [2024-11-28 05:21:37,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991465640] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:21:37,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930981667] [2024-11-28 05:21:37,085 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:21:37,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:21:37,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:21:37,087 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:21:37,089 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-11-28 05:21:37,265 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:21:37,265 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:21:37,267 INFO L256 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 54 conjuncts are in the unsatisfiable core [2024-11-28 05:21:37,271 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:21:37,380 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 8 treesize of output 1 [2024-11-28 05:21:41,850 WARN L873 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_7| Int) (|v_ULTIMATE.start_main_~pat~0#1.base_BEFORE_CALL_7| Int)) (= (select (select |c_#memory_int#1| |v_ULTIMATE.start_main_~pat~0#1.base_BEFORE_CALL_7|) 4) (select (select |c_#memory_int#2| |v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_7|) 4))) is different from true [2024-11-28 05:21:45,996 WARN L873 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_8| Int) (|v_ULTIMATE.start_main_~pat~0#1.base_BEFORE_CALL_8| Int)) (= (select (select |c_#memory_int#2| |v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_8|) 4) (select (select |c_#memory_int#1| |v_ULTIMATE.start_main_~pat~0#1.base_BEFORE_CALL_8|) 4))) is different from true [2024-11-28 05:21:46,150 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 19 treesize of output 11 [2024-11-28 05:21:46,153 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 15 treesize of output 7 [2024-11-28 05:21:46,256 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 22 proven. 18 refuted. 1 times theorem prover too weak. 14 trivial. 3 not checked. [2024-11-28 05:21:46,256 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:21:46,521 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:21:46,522 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 39 treesize of output 42 [2024-11-28 05:21:46,746 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 17 proven. 8 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-28 05:21:46,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930981667] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:21:46,746 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:21:46,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17, 12] total 43 [2024-11-28 05:21:46,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502680622] [2024-11-28 05:21:46,747 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:21:46,747 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-11-28 05:21:46,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:21:46,748 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-11-28 05:21:46,748 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1514, Unknown=2, NotChecked=158, Total=1806 [2024-11-28 05:21:46,748 INFO L87 Difference]: Start difference. First operand 741 states and 895 transitions. Second operand has 43 states, 42 states have (on average 3.119047619047619) internal successors, (131), 43 states have internal predecessors, (131), 8 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (10), 7 states have call predecessors, (10), 8 states have call successors, (10) [2024-11-28 05:22:04,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:22:04,075 INFO L93 Difference]: Finished difference Result 1396 states and 1706 transitions. [2024-11-28 05:22:04,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2024-11-28 05:22:04,076 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 3.119047619047619) internal successors, (131), 43 states have internal predecessors, (131), 8 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (10), 7 states have call predecessors, (10), 8 states have call successors, (10) Word has length 76 [2024-11-28 05:22:04,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:22:04,080 INFO L225 Difference]: With dead ends: 1396 [2024-11-28 05:22:04,080 INFO L226 Difference]: Without dead ends: 1311 [2024-11-28 05:22:04,081 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 131 SyntacticMatches, 2 SemanticMatches, 92 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 2039 ImplicationChecksByTransitivity, 22.8s TimeCoverageRelationStatistics Valid=878, Invalid=7498, Unknown=4, NotChecked=362, Total=8742 [2024-11-28 05:22:04,082 INFO L435 NwaCegarLoop]: 99 mSDtfsCounter, 481 mSDsluCounter, 2003 mSDsCounter, 0 mSdLazyCounter, 2727 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 484 SdHoareTripleChecker+Valid, 2102 SdHoareTripleChecker+Invalid, 3751 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 2727 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 989 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2024-11-28 05:22:04,082 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [484 Valid, 2102 Invalid, 3751 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 2727 Invalid, 0 Unknown, 989 Unchecked, 3.4s Time] [2024-11-28 05:22:04,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1311 states. [2024-11-28 05:22:04,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1311 to 786. [2024-11-28 05:22:04,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 786 states, 755 states have (on average 1.1973509933774835) internal successors, (904), 761 states have internal predecessors, (904), 21 states have call successors, (21), 9 states have call predecessors, (21), 9 states have return successors, (19), 15 states have call predecessors, (19), 19 states have call successors, (19) [2024-11-28 05:22:04,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 786 states to 786 states and 944 transitions. [2024-11-28 05:22:04,358 INFO L78 Accepts]: Start accepts. Automaton has 786 states and 944 transitions. Word has length 76 [2024-11-28 05:22:04,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:22:04,358 INFO L471 AbstractCegarLoop]: Abstraction has 786 states and 944 transitions. [2024-11-28 05:22:04,358 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 3.119047619047619) internal successors, (131), 43 states have internal predecessors, (131), 8 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (10), 7 states have call predecessors, (10), 8 states have call successors, (10) [2024-11-28 05:22:04,358 INFO L276 IsEmpty]: Start isEmpty. Operand 786 states and 944 transitions. [2024-11-28 05:22:04,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-11-28 05:22:04,360 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:22:04,360 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:22:04,372 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2024-11-28 05:22:04,560 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:22:04,561 INFO L396 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:22:04,561 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:22:04,561 INFO L85 PathProgramCache]: Analyzing trace with hash -2096066384, now seen corresponding path program 2 times [2024-11-28 05:22:04,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:22:04,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748096346] [2024-11-28 05:22:04,561 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:22:04,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:22:04,597 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:22:04,598 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:22:04,925 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-28 05:22:04,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:22:04,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748096346] [2024-11-28 05:22:04,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748096346] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:22:04,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836446973] [2024-11-28 05:22:04,926 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:22:04,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:22:04,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:22:04,928 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:22:04,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-11-28 05:22:05,145 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:22:05,145 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:22:05,148 INFO L256 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-28 05:22:05,149 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:22:05,563 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 45 proven. 18 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-11-28 05:22:05,564 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:22:05,935 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 45 proven. 10 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2024-11-28 05:22:05,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836446973] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:22:05,935 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:22:05,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 9] total 28 [2024-11-28 05:22:05,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850523755] [2024-11-28 05:22:05,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:22:05,936 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-28 05:22:05,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:22:05,936 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-28 05:22:05,937 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2024-11-28 05:22:05,937 INFO L87 Difference]: Start difference. First operand 786 states and 944 transitions. Second operand has 28 states, 27 states have (on average 4.37037037037037) internal successors, (118), 27 states have internal predecessors, (118), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-28 05:22:07,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:22:07,365 INFO L93 Difference]: Finished difference Result 1068 states and 1278 transitions. [2024-11-28 05:22:07,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-28 05:22:07,365 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 4.37037037037037) internal successors, (118), 27 states have internal predecessors, (118), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 74 [2024-11-28 05:22:07,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:22:07,368 INFO L225 Difference]: With dead ends: 1068 [2024-11-28 05:22:07,368 INFO L226 Difference]: Without dead ends: 851 [2024-11-28 05:22:07,368 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 132 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=121, Invalid=1139, Unknown=0, NotChecked=0, Total=1260 [2024-11-28 05:22:07,369 INFO L435 NwaCegarLoop]: 85 mSDtfsCounter, 48 mSDsluCounter, 1757 mSDsCounter, 0 mSdLazyCounter, 1235 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 1842 SdHoareTripleChecker+Invalid, 1237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-28 05:22:07,369 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 1842 Invalid, 1237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1235 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-28 05:22:07,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 851 states. [2024-11-28 05:22:07,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 851 to 792. [2024-11-28 05:22:07,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 792 states, 761 states have (on average 1.1984231274638633) internal successors, (912), 767 states have internal predecessors, (912), 21 states have call successors, (21), 9 states have call predecessors, (21), 9 states have return successors, (19), 15 states have call predecessors, (19), 19 states have call successors, (19) [2024-11-28 05:22:07,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 792 states to 792 states and 952 transitions. [2024-11-28 05:22:07,626 INFO L78 Accepts]: Start accepts. Automaton has 792 states and 952 transitions. Word has length 74 [2024-11-28 05:22:07,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:22:07,626 INFO L471 AbstractCegarLoop]: Abstraction has 792 states and 952 transitions. [2024-11-28 05:22:07,626 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 4.37037037037037) internal successors, (118), 27 states have internal predecessors, (118), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-28 05:22:07,626 INFO L276 IsEmpty]: Start isEmpty. Operand 792 states and 952 transitions. [2024-11-28 05:22:07,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2024-11-28 05:22:07,627 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:22:07,627 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:22:07,633 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2024-11-28 05:22:07,827 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:22:07,827 INFO L396 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:22:07,828 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:22:07,828 INFO L85 PathProgramCache]: Analyzing trace with hash 768613691, now seen corresponding path program 1 times [2024-11-28 05:22:07,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:22:07,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359792003] [2024-11-28 05:22:07,828 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:22:07,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:22:07,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:22:09,009 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 2 proven. 38 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-28 05:22:09,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:22:09,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359792003] [2024-11-28 05:22:09,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359792003] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:22:09,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760761466] [2024-11-28 05:22:09,010 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:22:09,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:22:09,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:22:09,012 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:22:09,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa77fc0b-7b3e-4af2-b356-4e1c27f94513/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-11-28 05:22:09,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:22:09,253 INFO L256 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-11-28 05:22:09,255 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:22:10,318 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 19 proven. 31 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-28 05:22:10,318 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:22:12,343 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 14 proven. 26 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-28 05:22:12,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760761466] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:22:12,344 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:22:12,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 22, 23] total 66 [2024-11-28 05:22:12,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025221628] [2024-11-28 05:22:12,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:22:12,344 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2024-11-28 05:22:12,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:22:12,345 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2024-11-28 05:22:12,345 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=323, Invalid=3967, Unknown=0, NotChecked=0, Total=4290 [2024-11-28 05:22:12,346 INFO L87 Difference]: Start difference. First operand 792 states and 952 transitions. Second operand has 66 states, 66 states have (on average 2.242424242424242) internal successors, (148), 65 states have internal predecessors, (148), 5 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2024-11-28 05:22:53,011 WARN L286 SmtUtils]: Spent 40.11s on a formula simplification. DAG size of input: 32 DAG size of output: 30 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-28 05:23:09,310 WARN L286 SmtUtils]: Spent 16.08s on a formula simplification. DAG size of input: 26 DAG size of output: 25 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-28 05:23:13,457 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-28 05:23:53,787 WARN L286 SmtUtils]: Spent 40.11s on a formula simplification. DAG size of input: 34 DAG size of output: 32 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-28 05:24:22,172 WARN L286 SmtUtils]: Spent 28.10s on a formula simplification. DAG size of input: 38 DAG size of output: 36 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-28 05:24:26,175 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-28 05:24:30,452 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-28 05:24:34,642 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-28 05:25:19,066 WARN L286 SmtUtils]: Spent 44.20s on a formula simplification. DAG size of input: 31 DAG size of output: 29 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-28 05:25:47,570 WARN L286 SmtUtils]: Spent 28.12s on a formula simplification. DAG size of input: 34 DAG size of output: 32 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-28 05:26:12,069 WARN L286 SmtUtils]: Spent 24.12s on a formula simplification. DAG size of input: 37 DAG size of output: 35 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-28 05:26:41,328 WARN L286 SmtUtils]: Spent 28.16s on a formula simplification. DAG size of input: 36 DAG size of output: 34 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-28 05:27:09,568 WARN L286 SmtUtils]: Spent 28.14s on a formula simplification. DAG size of input: 46 DAG size of output: 37 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-28 05:27:53,907 WARN L286 SmtUtils]: Spent 44.14s on a formula simplification. DAG size of input: 38 DAG size of output: 36 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-28 05:28:39,477 WARN L286 SmtUtils]: Spent 44.19s on a formula simplification. DAG size of input: 43 DAG size of output: 40 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-28 05:28:59,885 WARN L286 SmtUtils]: Spent 20.14s on a formula simplification. DAG size of input: 38 DAG size of output: 36 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-28 05:29:45,622 WARN L286 SmtUtils]: Spent 44.23s on a formula simplification. DAG size of input: 42 DAG size of output: 39 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-28 05:30:14,273 WARN L286 SmtUtils]: Spent 28.23s on a formula simplification. DAG size of input: 48 DAG size of output: 44 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-28 05:30:44,038 WARN L286 SmtUtils]: Spent 28.14s on a formula simplification. DAG size of input: 40 DAG size of output: 37 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-28 05:31:28,434 WARN L286 SmtUtils]: Spent 44.15s on a formula simplification. DAG size of input: 39 DAG size of output: 37 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-28 05:31:56,907 WARN L286 SmtUtils]: Spent 28.15s on a formula simplification. DAG size of input: 37 DAG size of output: 34 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-28 05:32:25,363 WARN L286 SmtUtils]: Spent 28.17s on a formula simplification. DAG size of input: 36 DAG size of output: 35 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-28 05:32:53,852 WARN L286 SmtUtils]: Spent 28.13s on a formula simplification. DAG size of input: 39 DAG size of output: 35 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-28 05:33:18,189 WARN L286 SmtUtils]: Spent 24.13s on a formula simplification. DAG size of input: 40 DAG size of output: 36 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)