./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/square_8+soft_float_1-3a.c.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version d790fecc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/bin/uautomizer-verify-84ZbGMXZE1/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/bin/uautomizer-verify-84ZbGMXZE1/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/bin/uautomizer-verify-84ZbGMXZE1/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/bin/uautomizer-verify-84ZbGMXZE1/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/square_8+soft_float_1-3a.c.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/bin/uautomizer-verify-84ZbGMXZE1/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/bin/uautomizer-verify-84ZbGMXZE1 --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 13801fa2c96f7c93ace2086dcc65f456b83ac056f84901412492a5919d95dd03 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-12-02 15:27:25,643 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-12-02 15:27:25,708 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/bin/uautomizer-verify-84ZbGMXZE1/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-12-02 15:27:25,714 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-12-02 15:27:25,714 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-12-02 15:27:25,738 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-12-02 15:27:25,739 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-12-02 15:27:25,739 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-12-02 15:27:25,740 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-12-02 15:27:25,740 INFO L153 SettingsManager]: * Use memory slicer=true [2024-12-02 15:27:25,740 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-12-02 15:27:25,740 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-12-02 15:27:25,741 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-12-02 15:27:25,741 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-12-02 15:27:25,741 INFO L153 SettingsManager]: * Use SBE=true [2024-12-02 15:27:25,741 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-12-02 15:27:25,741 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-12-02 15:27:25,741 INFO L153 SettingsManager]: * sizeof long=4 [2024-12-02 15:27:25,741 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-12-02 15:27:25,742 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-12-02 15:27:25,742 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-12-02 15:27:25,742 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-12-02 15:27:25,742 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-12-02 15:27:25,742 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-12-02 15:27:25,742 INFO L153 SettingsManager]: * sizeof long double=12 [2024-12-02 15:27:25,742 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-12-02 15:27:25,742 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-12-02 15:27:25,743 INFO L153 SettingsManager]: * Use constant arrays=true [2024-12-02 15:27:25,743 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-12-02 15:27:25,743 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-12-02 15:27:25,743 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-12-02 15:27:25,743 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-12-02 15:27:25,743 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 15:27:25,743 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-12-02 15:27:25,743 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-12-02 15:27:25,744 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-12-02 15:27:25,744 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-12-02 15:27:25,744 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 15:27:25,744 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-12-02 15:27:25,744 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-12-02 15:27:25,744 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-12-02 15:27:25,744 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-12-02 15:27:25,744 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-12-02 15:27:25,745 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-12-02 15:27:25,745 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-12-02 15:27:25,745 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-12-02 15:27:25,745 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-12-02 15:27:25,745 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-12-02 15:27:25,745 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_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/bin/uautomizer-verify-84ZbGMXZE1 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 -> 13801fa2c96f7c93ace2086dcc65f456b83ac056f84901412492a5919d95dd03 [2024-12-02 15:27:26,002 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-12-02 15:27:26,011 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-12-02 15:27:26,014 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-12-02 15:27:26,015 INFO L270 PluginConnector]: Initializing CDTParser... [2024-12-02 15:27:26,016 INFO L274 PluginConnector]: CDTParser initialized [2024-12-02 15:27:26,017 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/bin/uautomizer-verify-84ZbGMXZE1/../../sv-benchmarks/c/combinations/square_8+soft_float_1-3a.c.cil.c [2024-12-02 15:27:29,237 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/bin/uautomizer-verify-84ZbGMXZE1/data/aa2e20e7d/0941e3c0562b401ba31309c6bf4f4c7d/FLAGbab01e241 [2024-12-02 15:27:29,479 INFO L384 CDTParser]: Found 1 translation units. [2024-12-02 15:27:29,480 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/sv-benchmarks/c/combinations/square_8+soft_float_1-3a.c.cil.c [2024-12-02 15:27:29,490 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/bin/uautomizer-verify-84ZbGMXZE1/data/aa2e20e7d/0941e3c0562b401ba31309c6bf4f4c7d/FLAGbab01e241 [2024-12-02 15:27:29,508 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/bin/uautomizer-verify-84ZbGMXZE1/data/aa2e20e7d/0941e3c0562b401ba31309c6bf4f4c7d [2024-12-02 15:27:29,511 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-12-02 15:27:29,513 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-12-02 15:27:29,514 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-12-02 15:27:29,514 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-12-02 15:27:29,520 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-12-02 15:27:29,521 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 03:27:29" (1/1) ... [2024-12-02 15:27:29,522 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a735115 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:27:29, skipping insertion in model container [2024-12-02 15:27:29,522 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 03:27:29" (1/1) ... [2024-12-02 15:27:29,550 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-12-02 15:27:29,718 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_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/sv-benchmarks/c/combinations/square_8+soft_float_1-3a.c.cil.c[1995,2008] [2024-12-02 15:27:29,724 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_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/sv-benchmarks/c/combinations/square_8+soft_float_1-3a.c.cil.c[2364,2377] [2024-12-02 15:27:29,775 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-12-02 15:27:29,785 INFO L200 MainTranslator]: Completed pre-run [2024-12-02 15:27:29,798 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_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/sv-benchmarks/c/combinations/square_8+soft_float_1-3a.c.cil.c[1995,2008] [2024-12-02 15:27:29,799 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_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/sv-benchmarks/c/combinations/square_8+soft_float_1-3a.c.cil.c[2364,2377] [2024-12-02 15:27:29,825 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-12-02 15:27:29,841 INFO L204 MainTranslator]: Completed translation [2024-12-02 15:27:29,842 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:27:29 WrapperNode [2024-12-02 15:27:29,842 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-12-02 15:27:29,843 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-12-02 15:27:29,843 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-12-02 15:27:29,843 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-12-02 15:27:29,850 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:27:29" (1/1) ... [2024-12-02 15:27:29,859 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:27:29" (1/1) ... [2024-12-02 15:27:29,888 INFO L138 Inliner]: procedures = 27, calls = 21, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 210 [2024-12-02 15:27:29,889 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-12-02 15:27:29,889 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-12-02 15:27:29,890 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-12-02 15:27:29,890 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-12-02 15:27:29,899 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:27:29" (1/1) ... [2024-12-02 15:27:29,899 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:27:29" (1/1) ... [2024-12-02 15:27:29,901 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:27:29" (1/1) ... [2024-12-02 15:27:29,917 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-12-02 15:27:29,917 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:27:29" (1/1) ... [2024-12-02 15:27:29,918 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:27:29" (1/1) ... [2024-12-02 15:27:29,925 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:27:29" (1/1) ... [2024-12-02 15:27:29,927 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:27:29" (1/1) ... [2024-12-02 15:27:29,933 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:27:29" (1/1) ... [2024-12-02 15:27:29,935 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:27:29" (1/1) ... [2024-12-02 15:27:29,937 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:27:29" (1/1) ... [2024-12-02 15:27:29,940 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-12-02 15:27:29,941 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-12-02 15:27:29,941 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-12-02 15:27:29,941 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-12-02 15:27:29,942 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:27:29" (1/1) ... [2024-12-02 15:27:29,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 15:27:29,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 15:27:29,975 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-12-02 15:27:29,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-12-02 15:27:30,001 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-12-02 15:27:30,001 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2024-12-02 15:27:30,002 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2024-12-02 15:27:30,002 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-12-02 15:27:30,002 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-12-02 15:27:30,002 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-12-02 15:27:30,002 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-12-02 15:27:30,002 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-12-02 15:27:30,084 INFO L234 CfgBuilder]: Building ICFG [2024-12-02 15:27:30,087 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-12-02 15:27:30,553 INFO L? ?]: Removed 81 outVars from TransFormulas that were not future-live. [2024-12-02 15:27:30,553 INFO L283 CfgBuilder]: Performing block encoding [2024-12-02 15:27:30,563 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-12-02 15:27:30,563 INFO L312 CfgBuilder]: Removed 4 assume(true) statements. [2024-12-02 15:27:30,563 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 03:27:30 BoogieIcfgContainer [2024-12-02 15:27:30,563 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-12-02 15:27:30,566 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-12-02 15:27:30,566 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-12-02 15:27:30,570 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-12-02 15:27:30,570 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 03:27:29" (1/3) ... [2024-12-02 15:27:30,571 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@523dd7aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 03:27:30, skipping insertion in model container [2024-12-02 15:27:30,571 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:27:29" (2/3) ... [2024-12-02 15:27:30,571 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@523dd7aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 03:27:30, skipping insertion in model container [2024-12-02 15:27:30,571 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 03:27:30" (3/3) ... [2024-12-02 15:27:30,572 INFO L128 eAbstractionObserver]: Analyzing ICFG square_8+soft_float_1-3a.c.cil.c [2024-12-02 15:27:30,585 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-12-02 15:27:30,587 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG square_8+soft_float_1-3a.c.cil.c that has 3 procedures, 103 locations, 1 initial locations, 2 loop locations, and 2 error locations. [2024-12-02 15:27:30,641 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-12-02 15:27:30,654 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;@7fd3856f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-12-02 15:27:30,654 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-12-02 15:27:30,658 INFO L276 IsEmpty]: Start isEmpty. Operand has 103 states, 89 states have (on average 1.5842696629213484) internal successors, (141), 93 states have internal predecessors, (141), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-12-02 15:27:30,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-12-02 15:27:30,663 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 15:27:30,664 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-12-02 15:27:30,664 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 15:27:30,669 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 15:27:30,669 INFO L85 PathProgramCache]: Analyzing trace with hash 1530844763, now seen corresponding path program 1 times [2024-12-02 15:27:30,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 15:27:30,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677364716] [2024-12-02 15:27:30,677 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 15:27:30,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 15:27:30,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 15:27:30,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 15:27:30,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 15:27:30,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677364716] [2024-12-02 15:27:30,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677364716] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 15:27:30,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 15:27:30,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-12-02 15:27:30,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120751600] [2024-12-02 15:27:30,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 15:27:30,805 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-12-02 15:27:30,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 15:27:30,822 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-12-02 15:27:30,822 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-12-02 15:27:30,824 INFO L87 Difference]: Start difference. First operand has 103 states, 89 states have (on average 1.5842696629213484) internal successors, (141), 93 states have internal predecessors, (141), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 15:27:30,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 15:27:30,855 INFO L93 Difference]: Finished difference Result 201 states and 319 transitions. [2024-12-02 15:27:30,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-12-02 15:27:30,856 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-12-02 15:27:30,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 15:27:30,863 INFO L225 Difference]: With dead ends: 201 [2024-12-02 15:27:30,863 INFO L226 Difference]: Without dead ends: 96 [2024-12-02 15:27:30,866 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-12-02 15:27:30,869 INFO L435 NwaCegarLoop]: 150 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, 150 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 [2024-12-02 15:27:30,870 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 15:27:30,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2024-12-02 15:27:30,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2024-12-02 15:27:30,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 83 states have (on average 1.4939759036144578) internal successors, (124), 86 states have internal predecessors, (124), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-12-02 15:27:30,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 141 transitions. [2024-12-02 15:27:30,905 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 141 transitions. Word has length 7 [2024-12-02 15:27:30,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 15:27:30,906 INFO L471 AbstractCegarLoop]: Abstraction has 96 states and 141 transitions. [2024-12-02 15:27:30,906 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 15:27:30,906 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 141 transitions. [2024-12-02 15:27:30,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-12-02 15:27:30,907 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 15:27:30,907 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-12-02 15:27:30,907 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-12-02 15:27:30,907 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 15:27:30,908 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 15:27:30,908 INFO L85 PathProgramCache]: Analyzing trace with hash 1530904345, now seen corresponding path program 1 times [2024-12-02 15:27:30,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 15:27:30,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050708719] [2024-12-02 15:27:30,908 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 15:27:30,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 15:27:30,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-12-02 15:27:30,926 INFO L357 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-12-02 15:27:30,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-12-02 15:27:30,951 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-12-02 15:27:30,951 INFO L340 BasicCegarLoop]: Counterexample is feasible [2024-12-02 15:27:30,952 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2024-12-02 15:27:30,954 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2024-12-02 15:27:30,954 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-12-02 15:27:30,957 INFO L422 BasicCegarLoop]: Path program histogram: [1, 1] [2024-12-02 15:27:30,968 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2024-12-02 15:27:30,972 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.12 03:27:30 BoogieIcfgContainer [2024-12-02 15:27:30,972 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-12-02 15:27:30,973 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-12-02 15:27:30,973 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-12-02 15:27:30,973 INFO L274 PluginConnector]: Witness Printer initialized [2024-12-02 15:27:30,974 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 03:27:30" (3/4) ... [2024-12-02 15:27:30,977 INFO L149 WitnessPrinter]: No result that supports witness generation found [2024-12-02 15:27:30,977 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-12-02 15:27:30,978 INFO L158 Benchmark]: Toolchain (without parser) took 1465.85ms. Allocated memory is still 117.4MB. Free memory was 92.3MB in the beginning and 80.4MB in the end (delta: 11.8MB). Peak memory consumption was 13.5MB. Max. memory is 16.1GB. [2024-12-02 15:27:30,979 INFO L158 Benchmark]: CDTParser took 0.31ms. Allocated memory is still 117.4MB. Free memory was 72.8MB in the beginning and 72.8MB in the end (delta: 86.9kB). There was no memory consumed. Max. memory is 16.1GB. [2024-12-02 15:27:30,979 INFO L158 Benchmark]: CACSL2BoogieTranslator took 328.28ms. Allocated memory is still 117.4MB. Free memory was 92.3MB in the beginning and 77.3MB in the end (delta: 15.0MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2024-12-02 15:27:30,980 INFO L158 Benchmark]: Boogie Procedure Inliner took 46.19ms. Allocated memory is still 117.4MB. Free memory was 77.3MB in the beginning and 75.3MB in the end (delta: 2.0MB). There was no memory consumed. Max. memory is 16.1GB. [2024-12-02 15:27:30,980 INFO L158 Benchmark]: Boogie Preprocessor took 50.44ms. Allocated memory is still 117.4MB. Free memory was 75.3MB in the beginning and 73.1MB in the end (delta: 2.2MB). There was no memory consumed. Max. memory is 16.1GB. [2024-12-02 15:27:30,980 INFO L158 Benchmark]: RCFGBuilder took 622.91ms. Allocated memory is still 117.4MB. Free memory was 73.1MB in the beginning and 49.7MB in the end (delta: 23.4MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2024-12-02 15:27:30,981 INFO L158 Benchmark]: TraceAbstraction took 406.51ms. Allocated memory is still 117.4MB. Free memory was 49.1MB in the beginning and 81.0MB in the end (delta: -31.8MB). There was no memory consumed. Max. memory is 16.1GB. [2024-12-02 15:27:30,981 INFO L158 Benchmark]: Witness Printer took 4.50ms. Allocated memory is still 117.4MB. Free memory was 81.0MB in the beginning and 80.4MB in the end (delta: 538.4kB). There was no memory consumed. Max. memory is 16.1GB. [2024-12-02 15:27:30,983 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31ms. Allocated memory is still 117.4MB. Free memory was 72.8MB in the beginning and 72.8MB in the end (delta: 86.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 328.28ms. Allocated memory is still 117.4MB. Free memory was 92.3MB in the beginning and 77.3MB in the end (delta: 15.0MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 46.19ms. Allocated memory is still 117.4MB. Free memory was 77.3MB in the beginning and 75.3MB in the end (delta: 2.0MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 50.44ms. Allocated memory is still 117.4MB. Free memory was 75.3MB in the beginning and 73.1MB in the end (delta: 2.2MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 622.91ms. Allocated memory is still 117.4MB. Free memory was 73.1MB in the beginning and 49.7MB in the end (delta: 23.4MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. * TraceAbstraction took 406.51ms. Allocated memory is still 117.4MB. Free memory was 49.1MB in the beginning and 81.0MB in the end (delta: -31.8MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 4.50ms. Allocated memory is still 117.4MB. Free memory was 81.0MB in the beginning and 80.4MB in the end (delta: 538.4kB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 48]: Unable to prove that a call to reach_error is unreachable Unable to prove that a call to reach_error is unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 47, overapproximation of someBinaryFLOATComparisonOperation at line 40, overapproximation of someBinaryArithmeticFLOAToperation at line 45. Possible FailurePath: [L402] COND TRUE __VERIFIER_nondet_int() [L403] CALL main1() [L39] float IN = __VERIFIER_nondet_float(); [L40] CALL assume_abort_if_not(IN >= 0.0f && IN < 1.0f) [L34] COND FALSE !(!cond) [L40] RET assume_abort_if_not(IN >= 0.0f && IN < 1.0f) [L42] float x = IN; [L44-L45] float result = 1.0f + 0.5f*x - 0.125f*x*x + 0.0625f*x*x*x - 0.0390625f*x*x*x*x; [L47] COND TRUE !(result >= 0.0f && result < 1.5f) [L48] reach_error() - UnprovableResult [Line: 60]: Unable to prove that a call to reach_error is unreachable Unable to prove that a call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 103 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 0.3s, OverallIterations: 2, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 0 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 0 mSDsluCounter, 150 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 0 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 0 IncrementalHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 0 mSolverCounterUnsat, 150 mSDtfsCounter, 0 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=103occurred in iteration=0, InterpolantAutomatonStates: 2, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 14 NumberOfCodeBlocks, 14 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 6 ConstructedInterpolants, 0 QuantifiedInterpolants, 6 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available, ConComCheckerStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2024-12-02 15:27:31,000 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/bin/uautomizer-verify-84ZbGMXZE1/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/bin/uautomizer-verify-84ZbGMXZE1/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/bin/uautomizer-verify-84ZbGMXZE1/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/bin/uautomizer-verify-84ZbGMXZE1/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/square_8+soft_float_1-3a.c.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/bin/uautomizer-verify-84ZbGMXZE1/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/bin/uautomizer-verify-84ZbGMXZE1 --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 13801fa2c96f7c93ace2086dcc65f456b83ac056f84901412492a5919d95dd03 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-12-02 15:27:33,433 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-12-02 15:27:33,534 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/bin/uautomizer-verify-84ZbGMXZE1/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2024-12-02 15:27:33,542 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-12-02 15:27:33,542 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-12-02 15:27:33,572 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-12-02 15:27:33,572 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-12-02 15:27:33,573 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-12-02 15:27:33,573 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-12-02 15:27:33,573 INFO L153 SettingsManager]: * Use memory slicer=true [2024-12-02 15:27:33,573 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-12-02 15:27:33,573 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-12-02 15:27:33,574 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-12-02 15:27:33,574 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-12-02 15:27:33,574 INFO L153 SettingsManager]: * Use SBE=true [2024-12-02 15:27:33,574 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-12-02 15:27:33,575 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-12-02 15:27:33,575 INFO L153 SettingsManager]: * sizeof long=4 [2024-12-02 15:27:33,575 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-12-02 15:27:33,575 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-12-02 15:27:33,575 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-12-02 15:27:33,575 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-12-02 15:27:33,575 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-12-02 15:27:33,575 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-12-02 15:27:33,575 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-12-02 15:27:33,575 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-12-02 15:27:33,576 INFO L153 SettingsManager]: * sizeof long double=12 [2024-12-02 15:27:33,576 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-12-02 15:27:33,576 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-12-02 15:27:33,576 INFO L153 SettingsManager]: * Use constant arrays=true [2024-12-02 15:27:33,576 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-12-02 15:27:33,576 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-12-02 15:27:33,576 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-12-02 15:27:33,576 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-12-02 15:27:33,576 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 15:27:33,577 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-12-02 15:27:33,577 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-12-02 15:27:33,577 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-12-02 15:27:33,577 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-12-02 15:27:33,577 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 15:27:33,577 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-12-02 15:27:33,577 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-12-02 15:27:33,577 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-12-02 15:27:33,577 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-12-02 15:27:33,577 INFO L153 SettingsManager]: * Trace refinement strategy=FOX [2024-12-02 15:27:33,577 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-12-02 15:27:33,578 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-12-02 15:27:33,578 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-12-02 15:27:33,578 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-12-02 15:27:33,578 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-12-02 15:27:33,578 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_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/bin/uautomizer-verify-84ZbGMXZE1 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 -> 13801fa2c96f7c93ace2086dcc65f456b83ac056f84901412492a5919d95dd03 [2024-12-02 15:27:33,883 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-12-02 15:27:33,892 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-12-02 15:27:33,895 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-12-02 15:27:33,896 INFO L270 PluginConnector]: Initializing CDTParser... [2024-12-02 15:27:33,897 INFO L274 PluginConnector]: CDTParser initialized [2024-12-02 15:27:33,898 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/bin/uautomizer-verify-84ZbGMXZE1/../../sv-benchmarks/c/combinations/square_8+soft_float_1-3a.c.cil.c [2024-12-02 15:27:37,286 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/bin/uautomizer-verify-84ZbGMXZE1/data/5dfba7806/e460e405b669413b88343c9cbd17c907/FLAGdeaee881c [2024-12-02 15:27:37,541 INFO L384 CDTParser]: Found 1 translation units. [2024-12-02 15:27:37,541 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/sv-benchmarks/c/combinations/square_8+soft_float_1-3a.c.cil.c [2024-12-02 15:27:37,552 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/bin/uautomizer-verify-84ZbGMXZE1/data/5dfba7806/e460e405b669413b88343c9cbd17c907/FLAGdeaee881c [2024-12-02 15:27:37,842 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/bin/uautomizer-verify-84ZbGMXZE1/data/5dfba7806/e460e405b669413b88343c9cbd17c907 [2024-12-02 15:27:37,844 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-12-02 15:27:37,845 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-12-02 15:27:37,846 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-12-02 15:27:37,846 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-12-02 15:27:37,852 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-12-02 15:27:37,853 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 03:27:37" (1/1) ... [2024-12-02 15:27:37,854 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24d87e6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:27:37, skipping insertion in model container [2024-12-02 15:27:37,854 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 03:27:37" (1/1) ... [2024-12-02 15:27:37,880 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-12-02 15:27:38,068 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_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/sv-benchmarks/c/combinations/square_8+soft_float_1-3a.c.cil.c[1995,2008] [2024-12-02 15:27:38,074 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_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/sv-benchmarks/c/combinations/square_8+soft_float_1-3a.c.cil.c[2364,2377] [2024-12-02 15:27:38,126 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-12-02 15:27:38,137 INFO L200 MainTranslator]: Completed pre-run [2024-12-02 15:27:38,153 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_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/sv-benchmarks/c/combinations/square_8+soft_float_1-3a.c.cil.c[1995,2008] [2024-12-02 15:27:38,155 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_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/sv-benchmarks/c/combinations/square_8+soft_float_1-3a.c.cil.c[2364,2377] [2024-12-02 15:27:38,192 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-12-02 15:27:38,212 INFO L204 MainTranslator]: Completed translation [2024-12-02 15:27:38,213 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:27:38 WrapperNode [2024-12-02 15:27:38,213 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-12-02 15:27:38,214 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-12-02 15:27:38,214 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-12-02 15:27:38,214 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-12-02 15:27:38,222 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:27:38" (1/1) ... [2024-12-02 15:27:38,235 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:27:38" (1/1) ... [2024-12-02 15:27:38,260 INFO L138 Inliner]: procedures = 28, calls = 21, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 167 [2024-12-02 15:27:38,261 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-12-02 15:27:38,261 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-12-02 15:27:38,262 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-12-02 15:27:38,262 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-12-02 15:27:38,273 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:27:38" (1/1) ... [2024-12-02 15:27:38,273 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:27:38" (1/1) ... [2024-12-02 15:27:38,277 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:27:38" (1/1) ... [2024-12-02 15:27:38,292 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-12-02 15:27:38,292 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:27:38" (1/1) ... [2024-12-02 15:27:38,292 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:27:38" (1/1) ... [2024-12-02 15:27:38,302 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:27:38" (1/1) ... [2024-12-02 15:27:38,303 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:27:38" (1/1) ... [2024-12-02 15:27:38,308 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:27:38" (1/1) ... [2024-12-02 15:27:38,310 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:27:38" (1/1) ... [2024-12-02 15:27:38,312 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:27:38" (1/1) ... [2024-12-02 15:27:38,315 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-12-02 15:27:38,316 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-12-02 15:27:38,317 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-12-02 15:27:38,317 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-12-02 15:27:38,318 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:27:38" (1/1) ... [2024-12-02 15:27:38,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 15:27:38,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 15:27:38,354 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-12-02 15:27:38,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-12-02 15:27:38,386 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-12-02 15:27:38,386 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-12-02 15:27:38,386 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2024-12-02 15:27:38,387 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2024-12-02 15:27:38,387 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-12-02 15:27:38,387 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-12-02 15:27:38,387 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-12-02 15:27:38,387 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-12-02 15:27:38,470 INFO L234 CfgBuilder]: Building ICFG [2024-12-02 15:27:38,472 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-12-02 15:27:43,167 INFO L? ?]: Removed 65 outVars from TransFormulas that were not future-live. [2024-12-02 15:27:43,168 INFO L283 CfgBuilder]: Performing block encoding [2024-12-02 15:27:43,179 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-12-02 15:27:43,179 INFO L312 CfgBuilder]: Removed 4 assume(true) statements. [2024-12-02 15:27:43,180 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 03:27:43 BoogieIcfgContainer [2024-12-02 15:27:43,180 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-12-02 15:27:43,182 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-12-02 15:27:43,182 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-12-02 15:27:43,187 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-12-02 15:27:43,187 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 03:27:37" (1/3) ... [2024-12-02 15:27:43,188 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4122c5e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 03:27:43, skipping insertion in model container [2024-12-02 15:27:43,188 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:27:38" (2/3) ... [2024-12-02 15:27:43,188 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4122c5e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 03:27:43, skipping insertion in model container [2024-12-02 15:27:43,188 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 03:27:43" (3/3) ... [2024-12-02 15:27:43,189 INFO L128 eAbstractionObserver]: Analyzing ICFG square_8+soft_float_1-3a.c.cil.c [2024-12-02 15:27:43,202 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-12-02 15:27:43,204 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG square_8+soft_float_1-3a.c.cil.c that has 3 procedures, 79 locations, 1 initial locations, 2 loop locations, and 2 error locations. [2024-12-02 15:27:43,255 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-12-02 15:27:43,268 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;@d53c565, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-12-02 15:27:43,268 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-12-02 15:27:43,272 INFO L276 IsEmpty]: Start isEmpty. Operand has 79 states, 65 states have (on average 1.6) internal successors, (104), 69 states have internal predecessors, (104), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-12-02 15:27:43,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-12-02 15:27:43,277 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 15:27:43,278 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-12-02 15:27:43,278 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 15:27:43,283 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 15:27:43,283 INFO L85 PathProgramCache]: Analyzing trace with hash 78502818, now seen corresponding path program 1 times [2024-12-02 15:27:43,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 15:27:43,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1960514972] [2024-12-02 15:27:43,293 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 15:27:43,293 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-12-02 15:27:43,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/bin/uautomizer-verify-84ZbGMXZE1/mathsat [2024-12-02 15:27:43,295 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/bin/uautomizer-verify-84ZbGMXZE1/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-12-02 15:27:43,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/bin/uautomizer-verify-84ZbGMXZE1/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2024-12-02 15:27:43,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 15:27:43,878 INFO L256 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 1 conjuncts are in the unsatisfiable core [2024-12-02 15:27:43,881 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 15:27:43,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 15:27:43,901 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 15:27:43,902 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 15:27:43,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1960514972] [2024-12-02 15:27:43,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1960514972] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 15:27:43,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 15:27:43,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-12-02 15:27:43,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444118370] [2024-12-02 15:27:43,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 15:27:43,908 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-12-02 15:27:43,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 15:27:43,925 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-12-02 15:27:43,926 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-12-02 15:27:43,928 INFO L87 Difference]: Start difference. First operand has 79 states, 65 states have (on average 1.6) internal successors, (104), 69 states have internal predecessors, (104), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 15:27:43,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 15:27:43,956 INFO L93 Difference]: Finished difference Result 153 states and 245 transitions. [2024-12-02 15:27:43,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-12-02 15:27:43,959 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-12-02 15:27:43,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 15:27:43,966 INFO L225 Difference]: With dead ends: 153 [2024-12-02 15:27:43,966 INFO L226 Difference]: Without dead ends: 72 [2024-12-02 15:27:43,969 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-12-02 15:27:43,972 INFO L435 NwaCegarLoop]: 115 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, 115 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 [2024-12-02 15:27:43,973 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 15:27:43,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2024-12-02 15:27:44,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2024-12-02 15:27:44,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 59 states have (on average 1.5084745762711864) internal successors, (89), 62 states have internal predecessors, (89), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-12-02 15:27:44,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 106 transitions. [2024-12-02 15:27:44,012 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 106 transitions. Word has length 7 [2024-12-02 15:27:44,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 15:27:44,012 INFO L471 AbstractCegarLoop]: Abstraction has 72 states and 106 transitions. [2024-12-02 15:27:44,013 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 15:27:44,013 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 106 transitions. [2024-12-02 15:27:44,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-12-02 15:27:44,013 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 15:27:44,014 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-12-02 15:27:44,024 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/bin/uautomizer-verify-84ZbGMXZE1/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Ended with exit code 0 [2024-12-02 15:27:44,214 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/bin/uautomizer-verify-84ZbGMXZE1/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-12-02 15:27:44,215 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 15:27:44,215 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 15:27:44,215 INFO L85 PathProgramCache]: Analyzing trace with hash 78562400, now seen corresponding path program 1 times [2024-12-02 15:27:44,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 15:27:44,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1258287290] [2024-12-02 15:27:44,216 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 15:27:44,216 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-12-02 15:27:44,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/bin/uautomizer-verify-84ZbGMXZE1/mathsat [2024-12-02 15:27:44,219 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/bin/uautomizer-verify-84ZbGMXZE1/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-12-02 15:27:44,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/bin/uautomizer-verify-84ZbGMXZE1/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2024-12-02 15:29:18,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 15:29:18,511 INFO L256 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-12-02 15:29:18,513 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 15:29:27,159 WARN L286 SmtUtils]: Spent 8.21s on a formula simplification that was a NOOP. DAG size: 3 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-12-02 15:29:35,252 WARN L286 SmtUtils]: Spent 8.09s on a formula simplification that was a NOOP. DAG size: 28 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-12-02 15:29:43,469 WARN L286 SmtUtils]: Spent 8.22s on a formula simplification that was a NOOP. DAG size: 5 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-12-02 15:29:47,532 WARN L851 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_main1_~IN~0#1_5| (_ FloatingPoint 8 24))) (let ((.cse0 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (and (fp.geq |v_ULTIMATE.start_main1_~IN~0#1_5| (_ +zero 8 24)) (fp.lt |v_ULTIMATE.start_main1_~IN~0#1_5| .cse0) (= (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode .cse0 (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 2.0)) |v_ULTIMATE.start_main1_~IN~0#1_5|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 8.0)) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 16.0)) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 5.0 128.0)) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|)) |c_ULTIMATE.start_main1_~result~0#1|)))) (= c_currentRoundingMode roundNearestTiesToEven)) is different from false [2024-12-02 15:30:03,829 WARN L286 SmtUtils]: Spent 8.19s on a formula simplification that was a NOOP. DAG size: 3 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-12-02 15:30:09,427 WARN L286 SmtUtils]: Spent 5.60s on a formula simplification that was a NOOP. DAG size: 5 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-12-02 15:30:17,531 WARN L286 SmtUtils]: Spent 8.10s on a formula simplification that was a NOOP. DAG size: 30 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-12-02 15:30:29,779 WARN L286 SmtUtils]: Spent 8.20s on a formula simplification that was a NOOP. DAG size: 3 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-12-02 15:30:37,982 WARN L286 SmtUtils]: Spent 8.20s on a formula simplification that was a NOOP. DAG size: 5 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-12-02 15:30:46,091 WARN L286 SmtUtils]: Spent 8.11s on a formula simplification that was a NOOP. DAG size: 29 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-12-02 15:30:50,207 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse0 ((_ to_fp 8 24) roundNearestTiesToEven 1.0)) (.cse1 ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 2.0))) (.cse2 ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 8.0))) (.cse3 ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 16.0))) (.cse4 ((_ to_fp 8 24) roundNearestTiesToEven (/ 5.0 128.0)))) (or (exists ((|v_ULTIMATE.start_main1_~IN~0#1_5| (_ FloatingPoint 8 24))) (and (fp.geq |v_ULTIMATE.start_main1_~IN~0#1_5| (_ +zero 8 24)) (fp.lt |v_ULTIMATE.start_main1_~IN~0#1_5| .cse0) (not (fp.lt (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven .cse0 (fp.mul roundNearestTiesToEven .cse1 |v_ULTIMATE.start_main1_~IN~0#1_5|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse2 |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse3 |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse4 |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|)) ((_ to_fp 8 24) roundNearestTiesToEven (/ 3.0 2.0)))))) (exists ((|v_ULTIMATE.start_main1_~IN~0#1_5| (_ FloatingPoint 8 24))) (and (fp.geq |v_ULTIMATE.start_main1_~IN~0#1_5| (_ +zero 8 24)) (fp.lt |v_ULTIMATE.start_main1_~IN~0#1_5| .cse0) (not (fp.geq (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven .cse0 (fp.mul roundNearestTiesToEven .cse1 |v_ULTIMATE.start_main1_~IN~0#1_5|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse2 |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse3 |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse4 |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|)) (_ +zero 8 24))))))) is different from false [2024-12-02 15:30:54,241 WARN L873 $PredicateComparison]: unable to prove that (let ((.cse0 ((_ to_fp 8 24) roundNearestTiesToEven 1.0)) (.cse1 ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 2.0))) (.cse2 ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 8.0))) (.cse3 ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 16.0))) (.cse4 ((_ to_fp 8 24) roundNearestTiesToEven (/ 5.0 128.0)))) (or (exists ((|v_ULTIMATE.start_main1_~IN~0#1_5| (_ FloatingPoint 8 24))) (and (fp.geq |v_ULTIMATE.start_main1_~IN~0#1_5| (_ +zero 8 24)) (fp.lt |v_ULTIMATE.start_main1_~IN~0#1_5| .cse0) (not (fp.lt (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven .cse0 (fp.mul roundNearestTiesToEven .cse1 |v_ULTIMATE.start_main1_~IN~0#1_5|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse2 |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse3 |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse4 |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|)) ((_ to_fp 8 24) roundNearestTiesToEven (/ 3.0 2.0)))))) (exists ((|v_ULTIMATE.start_main1_~IN~0#1_5| (_ FloatingPoint 8 24))) (and (fp.geq |v_ULTIMATE.start_main1_~IN~0#1_5| (_ +zero 8 24)) (fp.lt |v_ULTIMATE.start_main1_~IN~0#1_5| .cse0) (not (fp.geq (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven .cse0 (fp.mul roundNearestTiesToEven .cse1 |v_ULTIMATE.start_main1_~IN~0#1_5|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse2 |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse3 |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse4 |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|)) (_ +zero 8 24))))))) is different from true [2024-12-02 15:30:54,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 15:30:54,241 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 15:30:54,242 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 15:30:54,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1258287290] [2024-12-02 15:30:54,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1258287290] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 15:30:54,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 15:30:54,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-12-02 15:30:54,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81198638] [2024-12-02 15:30:54,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 15:30:54,243 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-12-02 15:30:54,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 15:30:54,243 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-12-02 15:30:54,244 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=12, Unknown=3, NotChecked=14, Total=42 [2024-12-02 15:30:54,244 INFO L87 Difference]: Start difference. First operand 72 states and 106 transitions. Second operand has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 15:30:58,479 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.15s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-12-02 15:31:02,483 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-12-02 15:31:06,485 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-12-02 15:31:06,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 15:31:06,906 INFO L93 Difference]: Finished difference Result 72 states and 106 transitions. [2024-12-02 15:31:06,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-12-02 15:31:06,908 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-12-02 15:31:06,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 15:31:06,909 INFO L225 Difference]: With dead ends: 72 [2024-12-02 15:31:06,909 INFO L226 Difference]: Without dead ends: 67 [2024-12-02 15:31:06,909 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=13, Invalid=12, Unknown=3, NotChecked=14, Total=42 [2024-12-02 15:31:06,910 INFO L435 NwaCegarLoop]: 101 mSDtfsCounter, 100 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 212 IncrementalHoareTripleChecker+Unchecked, 12.6s IncrementalHoareTripleChecker+Time [2024-12-02 15:31:06,910 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 267 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 3 Unknown, 212 Unchecked, 12.6s Time] [2024-12-02 15:31:06,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-12-02 15:31:06,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2024-12-02 15:31:06,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 55 states have (on average 1.5272727272727273) internal successors, (84), 57 states have internal predecessors, (84), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-12-02 15:31:06,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 101 transitions. [2024-12-02 15:31:06,917 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 101 transitions. Word has length 7 [2024-12-02 15:31:06,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 15:31:06,917 INFO L471 AbstractCegarLoop]: Abstraction has 67 states and 101 transitions. [2024-12-02 15:31:06,917 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 15:31:06,917 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 101 transitions. [2024-12-02 15:31:06,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-12-02 15:31:06,918 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 15:31:06,918 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 15:31:06,934 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/bin/uautomizer-verify-84ZbGMXZE1/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2024-12-02 15:31:07,118 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/bin/uautomizer-verify-84ZbGMXZE1/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-12-02 15:31:07,119 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 15:31:07,119 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 15:31:07,119 INFO L85 PathProgramCache]: Analyzing trace with hash -1378056105, now seen corresponding path program 1 times [2024-12-02 15:31:07,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 15:31:07,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [804603122] [2024-12-02 15:31:07,120 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 15:31:07,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:31:07,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 15:31:07,121 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 15:31:07,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-12-02 15:31:07,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 15:31:07,178 INFO L256 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-12-02 15:31:07,181 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 15:31:07,873 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-12-02 15:31:07,874 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 15:31:08,282 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-12-02 15:31:08,282 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 15:31:08,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804603122] [2024-12-02 15:31:08,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804603122] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 15:31:08,283 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-12-02 15:31:08,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2024-12-02 15:31:08,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667404832] [2024-12-02 15:31:08,283 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-12-02 15:31:08,283 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-12-02 15:31:08,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 15:31:08,284 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-12-02 15:31:08,284 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-12-02 15:31:08,284 INFO L87 Difference]: Start difference. First operand 67 states and 101 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-12-02 15:31:09,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 15:31:09,720 INFO L93 Difference]: Finished difference Result 144 states and 224 transitions. [2024-12-02 15:31:09,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-12-02 15:31:09,721 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 33 [2024-12-02 15:31:09,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 15:31:09,722 INFO L225 Difference]: With dead ends: 144 [2024-12-02 15:31:09,723 INFO L226 Difference]: Without dead ends: 99 [2024-12-02 15:31:09,723 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-12-02 15:31:09,723 INFO L435 NwaCegarLoop]: 86 mSDtfsCounter, 31 mSDsluCounter, 504 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 590 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-12-02 15:31:09,724 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 590 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-12-02 15:31:09,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2024-12-02 15:31:09,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 97. [2024-12-02 15:31:09,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 81 states have (on average 1.4814814814814814) internal successors, (120), 84 states have internal predecessors, (120), 12 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (15), 12 states have call predecessors, (15), 11 states have call successors, (15) [2024-12-02 15:31:09,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 147 transitions. [2024-12-02 15:31:09,733 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 147 transitions. Word has length 33 [2024-12-02 15:31:09,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 15:31:09,733 INFO L471 AbstractCegarLoop]: Abstraction has 97 states and 147 transitions. [2024-12-02 15:31:09,733 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-12-02 15:31:09,733 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 147 transitions. [2024-12-02 15:31:09,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-12-02 15:31:09,734 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 15:31:09,734 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2024-12-02 15:31:09,739 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-12-02 15:31:09,934 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:31:09,935 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 15:31:09,935 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 15:31:09,935 INFO L85 PathProgramCache]: Analyzing trace with hash 235274101, now seen corresponding path program 1 times [2024-12-02 15:31:09,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 15:31:09,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [125584953] [2024-12-02 15:31:09,935 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 15:31:09,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:31:09,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 15:31:09,937 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 15:31:09,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-12-02 15:31:09,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 15:31:09,987 INFO L256 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-12-02 15:31:09,988 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 15:31:11,138 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 15:31:11,138 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 15:31:11,867 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-12-02 15:31:11,867 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 15:31:11,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125584953] [2024-12-02 15:31:11,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125584953] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 15:31:11,867 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-12-02 15:31:11,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 12 [2024-12-02 15:31:11,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196531217] [2024-12-02 15:31:11,868 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-12-02 15:31:11,868 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-12-02 15:31:11,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 15:31:11,869 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-12-02 15:31:11,869 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-12-02 15:31:11,869 INFO L87 Difference]: Start difference. First operand 97 states and 147 transitions. Second operand has 12 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 9 states have internal predecessors, (31), 5 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2024-12-02 15:31:14,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 15:31:14,446 INFO L93 Difference]: Finished difference Result 229 states and 367 transitions. [2024-12-02 15:31:14,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-12-02 15:31:14,447 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 9 states have internal predecessors, (31), 5 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 36 [2024-12-02 15:31:14,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 15:31:14,449 INFO L225 Difference]: With dead ends: 229 [2024-12-02 15:31:14,449 INFO L226 Difference]: Without dead ends: 163 [2024-12-02 15:31:14,450 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-12-02 15:31:14,450 INFO L435 NwaCegarLoop]: 147 mSDtfsCounter, 58 mSDsluCounter, 940 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 1087 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2024-12-02 15:31:14,451 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 1087 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2024-12-02 15:31:14,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2024-12-02 15:31:14,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 125. [2024-12-02 15:31:14,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 103 states have (on average 1.3883495145631068) internal successors, (143), 103 states have internal predecessors, (143), 17 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (34), 21 states have call predecessors, (34), 16 states have call successors, (34) [2024-12-02 15:31:14,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 194 transitions. [2024-12-02 15:31:14,467 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 194 transitions. Word has length 36 [2024-12-02 15:31:14,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 15:31:14,467 INFO L471 AbstractCegarLoop]: Abstraction has 125 states and 194 transitions. [2024-12-02 15:31:14,468 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 9 states have internal predecessors, (31), 5 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2024-12-02 15:31:14,468 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 194 transitions. [2024-12-02 15:31:14,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-12-02 15:31:14,469 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 15:31:14,470 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] [2024-12-02 15:31:14,478 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-12-02 15:31:14,670 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:31:14,670 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 15:31:14,670 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 15:31:14,671 INFO L85 PathProgramCache]: Analyzing trace with hash 48320845, now seen corresponding path program 1 times [2024-12-02 15:31:14,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 15:31:14,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1379541421] [2024-12-02 15:31:14,671 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 15:31:14,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:31:14,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 15:31:14,672 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 15:31:14,673 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-12-02 15:31:14,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 15:31:14,719 INFO L256 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-12-02 15:31:14,720 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 15:31:14,925 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-12-02 15:31:14,926 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 15:31:14,926 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 15:31:14,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379541421] [2024-12-02 15:31:14,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379541421] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 15:31:14,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 15:31:14,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-12-02 15:31:14,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72126328] [2024-12-02 15:31:14,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 15:31:14,926 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 15:31:14,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 15:31:14,927 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 15:31:14,927 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-12-02 15:31:14,927 INFO L87 Difference]: Start difference. First operand 125 states and 194 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-12-02 15:31:15,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 15:31:15,274 INFO L93 Difference]: Finished difference Result 239 states and 372 transitions. [2024-12-02 15:31:15,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 15:31:15,275 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 39 [2024-12-02 15:31:15,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 15:31:15,276 INFO L225 Difference]: With dead ends: 239 [2024-12-02 15:31:15,276 INFO L226 Difference]: Without dead ends: 118 [2024-12-02 15:31:15,277 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-12-02 15:31:15,278 INFO L435 NwaCegarLoop]: 92 mSDtfsCounter, 22 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-12-02 15:31:15,278 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 260 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-12-02 15:31:15,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2024-12-02 15:31:15,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 108. [2024-12-02 15:31:15,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 89 states have (on average 1.3932584269662922) internal successors, (124), 93 states have internal predecessors, (124), 13 states have call successors, (13), 2 states have call predecessors, (13), 5 states have return successors, (24), 14 states have call predecessors, (24), 12 states have call successors, (24) [2024-12-02 15:31:15,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 161 transitions. [2024-12-02 15:31:15,292 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 161 transitions. Word has length 39 [2024-12-02 15:31:15,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 15:31:15,293 INFO L471 AbstractCegarLoop]: Abstraction has 108 states and 161 transitions. [2024-12-02 15:31:15,293 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-12-02 15:31:15,293 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 161 transitions. [2024-12-02 15:31:15,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-12-02 15:31:15,294 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 15:31:15,294 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2024-12-02 15:31:15,303 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-12-02 15:31:15,495 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:31:15,495 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 15:31:15,495 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 15:31:15,495 INFO L85 PathProgramCache]: Analyzing trace with hash -1532002409, now seen corresponding path program 1 times [2024-12-02 15:31:15,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 15:31:15,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [915287314] [2024-12-02 15:31:15,496 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 15:31:15,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:31:15,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 15:31:15,497 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 15:31:15,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-12-02 15:31:15,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 15:31:15,553 INFO L256 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-12-02 15:31:15,555 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 15:31:17,085 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 15:31:17,085 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 15:31:18,070 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-12-02 15:31:18,070 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 15:31:18,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915287314] [2024-12-02 15:31:18,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915287314] provided 1 perfect and 1 imperfect interpolant sequences [2024-12-02 15:31:18,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-12-02 15:31:18,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 14 [2024-12-02 15:31:18,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673919627] [2024-12-02 15:31:18,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 15:31:18,071 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-12-02 15:31:18,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 15:31:18,071 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-12-02 15:31:18,072 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2024-12-02 15:31:18,072 INFO L87 Difference]: Start difference. First operand 108 states and 161 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-12-02 15:31:19,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 15:31:19,707 INFO L93 Difference]: Finished difference Result 226 states and 339 transitions. [2024-12-02 15:31:19,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-12-02 15:31:19,708 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 40 [2024-12-02 15:31:19,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 15:31:19,709 INFO L225 Difference]: With dead ends: 226 [2024-12-02 15:31:19,709 INFO L226 Difference]: Without dead ends: 171 [2024-12-02 15:31:19,709 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2024-12-02 15:31:19,710 INFO L435 NwaCegarLoop]: 75 mSDtfsCounter, 36 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 430 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-12-02 15:31:19,710 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 430 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-12-02 15:31:19,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2024-12-02 15:31:19,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 129. [2024-12-02 15:31:19,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 110 states have (on average 1.3454545454545455) internal successors, (148), 111 states have internal predecessors, (148), 13 states have call successors, (13), 2 states have call predecessors, (13), 5 states have return successors, (24), 17 states have call predecessors, (24), 12 states have call successors, (24) [2024-12-02 15:31:19,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 185 transitions. [2024-12-02 15:31:19,720 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 185 transitions. Word has length 40 [2024-12-02 15:31:19,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 15:31:19,720 INFO L471 AbstractCegarLoop]: Abstraction has 129 states and 185 transitions. [2024-12-02 15:31:19,720 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-12-02 15:31:19,720 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 185 transitions. [2024-12-02 15:31:19,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-12-02 15:31:19,721 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 15:31:19,721 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2024-12-02 15:31:19,730 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-12-02 15:31:19,921 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:31:19,922 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 15:31:19,922 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 15:31:19,922 INFO L85 PathProgramCache]: Analyzing trace with hash -1474744107, now seen corresponding path program 1 times [2024-12-02 15:31:19,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 15:31:19,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [255761114] [2024-12-02 15:31:19,922 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 15:31:19,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:31:19,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 15:31:19,924 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 15:31:19,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-12-02 15:31:19,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 15:31:19,970 INFO L256 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-12-02 15:31:19,971 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 15:31:20,540 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-12-02 15:31:20,540 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 15:31:20,540 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 15:31:20,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255761114] [2024-12-02 15:31:20,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255761114] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 15:31:20,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 15:31:20,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-12-02 15:31:20,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51189188] [2024-12-02 15:31:20,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 15:31:20,541 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-12-02 15:31:20,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 15:31:20,542 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-12-02 15:31:20,542 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-12-02 15:31:20,542 INFO L87 Difference]: Start difference. First operand 129 states and 185 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-12-02 15:31:21,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 15:31:21,415 INFO L93 Difference]: Finished difference Result 228 states and 336 transitions. [2024-12-02 15:31:21,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-12-02 15:31:21,416 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 40 [2024-12-02 15:31:21,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 15:31:21,417 INFO L225 Difference]: With dead ends: 228 [2024-12-02 15:31:21,417 INFO L226 Difference]: Without dead ends: 167 [2024-12-02 15:31:21,418 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-12-02 15:31:21,419 INFO L435 NwaCegarLoop]: 86 mSDtfsCounter, 30 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 505 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-12-02 15:31:21,419 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 505 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-12-02 15:31:21,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2024-12-02 15:31:21,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 165. [2024-12-02 15:31:21,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 142 states have (on average 1.352112676056338) internal successors, (192), 145 states have internal predecessors, (192), 17 states have call successors, (17), 2 states have call predecessors, (17), 5 states have return successors, (28), 21 states have call predecessors, (28), 16 states have call successors, (28) [2024-12-02 15:31:21,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 237 transitions. [2024-12-02 15:31:21,432 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 237 transitions. Word has length 40 [2024-12-02 15:31:21,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 15:31:21,433 INFO L471 AbstractCegarLoop]: Abstraction has 165 states and 237 transitions. [2024-12-02 15:31:21,433 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-12-02 15:31:21,433 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 237 transitions. [2024-12-02 15:31:21,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-12-02 15:31:21,434 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 15:31:21,434 INFO L218 NwaCegarLoop]: trace histogram [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] [2024-12-02 15:31:21,440 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-12-02 15:31:21,635 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:31:21,635 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 15:31:21,635 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 15:31:21,635 INFO L85 PathProgramCache]: Analyzing trace with hash 1120467723, now seen corresponding path program 2 times [2024-12-02 15:31:21,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 15:31:21,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [136813861] [2024-12-02 15:31:21,636 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 15:31:21,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:31:21,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 15:31:21,637 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 15:31:21,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-12-02 15:31:21,682 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-12-02 15:31:21,682 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 15:31:21,683 INFO L256 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-12-02 15:31:21,685 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 15:31:22,299 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-12-02 15:31:22,299 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 15:31:22,300 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 15:31:22,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136813861] [2024-12-02 15:31:22,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136813861] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 15:31:22,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 15:31:22,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-12-02 15:31:22,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707052700] [2024-12-02 15:31:22,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 15:31:22,300 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-12-02 15:31:22,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 15:31:22,300 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-12-02 15:31:22,300 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-12-02 15:31:22,301 INFO L87 Difference]: Start difference. First operand 165 states and 237 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-12-02 15:31:23,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 15:31:23,204 INFO L93 Difference]: Finished difference Result 283 states and 414 transitions. [2024-12-02 15:31:23,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-12-02 15:31:23,204 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 43 [2024-12-02 15:31:23,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 15:31:23,206 INFO L225 Difference]: With dead ends: 283 [2024-12-02 15:31:23,206 INFO L226 Difference]: Without dead ends: 236 [2024-12-02 15:31:23,207 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-12-02 15:31:23,207 INFO L435 NwaCegarLoop]: 149 mSDtfsCounter, 46 mSDsluCounter, 566 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 715 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-12-02 15:31:23,208 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 715 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-12-02 15:31:23,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2024-12-02 15:31:23,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 235. [2024-12-02 15:31:23,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 205 states have (on average 1.3609756097560977) internal successors, (279), 207 states have internal predecessors, (279), 24 states have call successors, (24), 2 states have call predecessors, (24), 5 states have return successors, (35), 31 states have call predecessors, (35), 23 states have call successors, (35) [2024-12-02 15:31:23,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 338 transitions. [2024-12-02 15:31:23,223 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 338 transitions. Word has length 43 [2024-12-02 15:31:23,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 15:31:23,223 INFO L471 AbstractCegarLoop]: Abstraction has 235 states and 338 transitions. [2024-12-02 15:31:23,223 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-12-02 15:31:23,223 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 338 transitions. [2024-12-02 15:31:23,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-12-02 15:31:23,224 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 15:31:23,224 INFO L218 NwaCegarLoop]: trace histogram [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] [2024-12-02 15:31:23,233 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-12-02 15:31:23,424 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:31:23,425 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 15:31:23,425 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 15:31:23,425 INFO L85 PathProgramCache]: Analyzing trace with hash 440409353, now seen corresponding path program 1 times [2024-12-02 15:31:23,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 15:31:23,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1828748839] [2024-12-02 15:31:23,425 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 15:31:23,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:31:23,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 15:31:23,427 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 15:31:23,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-12-02 15:31:23,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 15:31:23,471 INFO L256 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-12-02 15:31:23,473 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 15:31:24,069 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-12-02 15:31:24,070 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 15:31:24,519 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-12-02 15:31:24,519 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 15:31:24,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828748839] [2024-12-02 15:31:24,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828748839] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 15:31:24,519 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-12-02 15:31:24,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2024-12-02 15:31:24,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175875313] [2024-12-02 15:31:24,520 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-12-02 15:31:24,520 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-12-02 15:31:24,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 15:31:24,520 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-12-02 15:31:24,520 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-12-02 15:31:24,521 INFO L87 Difference]: Start difference. First operand 235 states and 338 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-12-02 15:31:25,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 15:31:25,599 INFO L93 Difference]: Finished difference Result 408 states and 606 transitions. [2024-12-02 15:31:25,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-12-02 15:31:25,600 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 43 [2024-12-02 15:31:25,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 15:31:25,602 INFO L225 Difference]: With dead ends: 408 [2024-12-02 15:31:25,602 INFO L226 Difference]: Without dead ends: 326 [2024-12-02 15:31:25,602 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-12-02 15:31:25,603 INFO L435 NwaCegarLoop]: 143 mSDtfsCounter, 44 mSDsluCounter, 635 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 778 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-12-02 15:31:25,603 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 778 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-12-02 15:31:25,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2024-12-02 15:31:25,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 322. [2024-12-02 15:31:25,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 280 states have (on average 1.3642857142857143) internal successors, (382), 285 states have internal predecessors, (382), 36 states have call successors, (36), 2 states have call predecessors, (36), 5 states have return successors, (47), 43 states have call predecessors, (47), 35 states have call successors, (47) [2024-12-02 15:31:25,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 465 transitions. [2024-12-02 15:31:25,620 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 465 transitions. Word has length 43 [2024-12-02 15:31:25,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 15:31:25,620 INFO L471 AbstractCegarLoop]: Abstraction has 322 states and 465 transitions. [2024-12-02 15:31:25,620 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-12-02 15:31:25,620 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 465 transitions. [2024-12-02 15:31:25,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-12-02 15:31:25,621 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 15:31:25,621 INFO L218 NwaCegarLoop]: trace histogram [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] [2024-12-02 15:31:25,627 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-12-02 15:31:25,822 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:31:25,822 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 15:31:25,822 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 15:31:25,822 INFO L85 PathProgramCache]: Analyzing trace with hash 497667655, now seen corresponding path program 1 times [2024-12-02 15:31:25,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 15:31:25,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [551811655] [2024-12-02 15:31:25,822 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 15:31:25,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:31:25,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 15:31:25,824 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 15:31:25,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-12-02 15:31:25,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 15:31:25,866 INFO L256 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-12-02 15:31:25,867 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 15:31:27,561 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-12-02 15:31:27,561 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 15:31:27,561 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 15:31:27,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551811655] [2024-12-02 15:31:27,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551811655] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 15:31:27,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 15:31:27,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-12-02 15:31:27,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340602426] [2024-12-02 15:31:27,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 15:31:27,561 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-12-02 15:31:27,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 15:31:27,562 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-12-02 15:31:27,562 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2024-12-02 15:31:27,562 INFO L87 Difference]: Start difference. First operand 322 states and 465 transitions. Second operand has 12 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-12-02 15:31:31,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 15:31:31,690 INFO L93 Difference]: Finished difference Result 355 states and 508 transitions. [2024-12-02 15:31:31,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-12-02 15:31:31,691 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 43 [2024-12-02 15:31:31,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 15:31:31,693 INFO L225 Difference]: With dead ends: 355 [2024-12-02 15:31:31,693 INFO L226 Difference]: Without dead ends: 326 [2024-12-02 15:31:31,693 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2024-12-02 15:31:31,694 INFO L435 NwaCegarLoop]: 143 mSDtfsCounter, 73 mSDsluCounter, 1271 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 1414 SdHoareTripleChecker+Invalid, 419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2024-12-02 15:31:31,694 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 1414 Invalid, 419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 416 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2024-12-02 15:31:31,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2024-12-02 15:31:31,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 326. [2024-12-02 15:31:31,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 283 states have (on average 1.3568904593639577) internal successors, (384), 288 states have internal predecessors, (384), 36 states have call successors, (36), 3 states have call predecessors, (36), 6 states have return successors, (47), 43 states have call predecessors, (47), 35 states have call successors, (47) [2024-12-02 15:31:31,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 467 transitions. [2024-12-02 15:31:31,715 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 467 transitions. Word has length 43 [2024-12-02 15:31:31,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 15:31:31,715 INFO L471 AbstractCegarLoop]: Abstraction has 326 states and 467 transitions. [2024-12-02 15:31:31,716 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-12-02 15:31:31,716 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 467 transitions. [2024-12-02 15:31:31,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-12-02 15:31:31,717 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 15:31:31,717 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] [2024-12-02 15:31:31,722 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-12-02 15:31:31,917 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:31:31,917 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 15:31:31,918 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 15:31:31,918 INFO L85 PathProgramCache]: Analyzing trace with hash 2096282757, now seen corresponding path program 1 times [2024-12-02 15:31:31,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 15:31:31,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [594723772] [2024-12-02 15:31:31,918 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 15:31:31,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:31:31,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 15:31:31,920 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 15:31:31,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-12-02 15:31:31,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 15:31:31,961 INFO L256 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-12-02 15:31:31,962 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 15:31:32,715 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-12-02 15:31:32,715 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 15:31:33,347 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-12-02 15:31:33,348 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 15:31:33,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594723772] [2024-12-02 15:31:33,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594723772] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 15:31:33,348 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-12-02 15:31:33,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2024-12-02 15:31:33,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960594522] [2024-12-02 15:31:33,348 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-12-02 15:31:33,348 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-12-02 15:31:33,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 15:31:33,348 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-12-02 15:31:33,348 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-12-02 15:31:33,349 INFO L87 Difference]: Start difference. First operand 326 states and 467 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-12-02 15:31:34,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 15:31:34,572 INFO L93 Difference]: Finished difference Result 559 states and 827 transitions. [2024-12-02 15:31:34,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-12-02 15:31:34,573 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 43 [2024-12-02 15:31:34,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 15:31:34,575 INFO L225 Difference]: With dead ends: 559 [2024-12-02 15:31:34,575 INFO L226 Difference]: Without dead ends: 433 [2024-12-02 15:31:34,576 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 76 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-12-02 15:31:34,576 INFO L435 NwaCegarLoop]: 82 mSDtfsCounter, 30 mSDsluCounter, 474 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 556 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-12-02 15:31:34,577 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 556 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-12-02 15:31:34,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2024-12-02 15:31:34,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 368. [2024-12-02 15:31:34,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 321 states have (on average 1.35202492211838) internal successors, (434), 328 states have internal predecessors, (434), 40 states have call successors, (40), 3 states have call predecessors, (40), 6 states have return successors, (51), 47 states have call predecessors, (51), 39 states have call successors, (51) [2024-12-02 15:31:34,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 525 transitions. [2024-12-02 15:31:34,595 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 525 transitions. Word has length 43 [2024-12-02 15:31:34,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 15:31:34,596 INFO L471 AbstractCegarLoop]: Abstraction has 368 states and 525 transitions. [2024-12-02 15:31:34,596 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-12-02 15:31:34,596 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 525 transitions. [2024-12-02 15:31:34,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-12-02 15:31:34,597 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 15:31:34,597 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] [2024-12-02 15:31:34,603 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-12-02 15:31:34,797 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:31:34,797 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 15:31:34,798 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 15:31:34,798 INFO L85 PathProgramCache]: Analyzing trace with hash 1416224387, now seen corresponding path program 1 times [2024-12-02 15:31:34,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 15:31:34,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [606236556] [2024-12-02 15:31:34,798 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 15:31:34,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:31:34,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 15:31:34,799 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 15:31:34,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-12-02 15:31:34,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 15:31:34,846 INFO L256 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-12-02 15:31:34,847 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 15:31:36,055 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-12-02 15:31:36,056 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 15:31:38,075 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 15:31:38,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606236556] [2024-12-02 15:31:38,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606236556] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 15:31:38,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [684897150] [2024-12-02 15:31:38,075 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 15:31:38,075 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-12-02 15:31:38,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/bin/uautomizer-verify-84ZbGMXZE1/cvc4 [2024-12-02 15:31:38,077 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/bin/uautomizer-verify-84ZbGMXZE1/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-12-02 15:31:38,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/bin/uautomizer-verify-84ZbGMXZE1/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2024-12-02 15:31:38,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 15:31:38,167 INFO L256 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-12-02 15:31:38,169 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 15:31:38,670 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-12-02 15:31:38,670 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 15:31:38,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [684897150] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 15:31:38,970 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-12-02 15:31:38,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2024-12-02 15:31:38,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143567385] [2024-12-02 15:31:38,970 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-12-02 15:31:38,970 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-12-02 15:31:38,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 15:31:38,971 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-12-02 15:31:38,971 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2024-12-02 15:31:38,971 INFO L87 Difference]: Start difference. First operand 368 states and 525 transitions. Second operand has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-12-02 15:31:41,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 15:31:41,204 INFO L93 Difference]: Finished difference Result 378 states and 534 transitions. [2024-12-02 15:31:41,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-12-02 15:31:41,205 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 43 [2024-12-02 15:31:41,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 15:31:41,207 INFO L225 Difference]: With dead ends: 378 [2024-12-02 15:31:41,207 INFO L226 Difference]: Without dead ends: 376 [2024-12-02 15:31:41,207 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2024-12-02 15:31:41,208 INFO L435 NwaCegarLoop]: 131 mSDtfsCounter, 46 mSDsluCounter, 971 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 1102 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2024-12-02 15:31:41,208 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 1102 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2024-12-02 15:31:41,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2024-12-02 15:31:41,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 372. [2024-12-02 15:31:41,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 324 states have (on average 1.3487654320987654) internal successors, (437), 331 states have internal predecessors, (437), 40 states have call successors, (40), 4 states have call predecessors, (40), 7 states have return successors, (51), 47 states have call predecessors, (51), 39 states have call successors, (51) [2024-12-02 15:31:41,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 528 transitions. [2024-12-02 15:31:41,228 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 528 transitions. Word has length 43 [2024-12-02 15:31:41,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 15:31:41,228 INFO L471 AbstractCegarLoop]: Abstraction has 372 states and 528 transitions. [2024-12-02 15:31:41,228 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-12-02 15:31:41,228 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 528 transitions. [2024-12-02 15:31:41,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-12-02 15:31:41,229 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 15:31:41,229 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] [2024-12-02 15:31:41,235 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-12-02 15:31:41,431 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/bin/uautomizer-verify-84ZbGMXZE1/cvc4 --incremental --print-success --lang smt (14)] Ended with exit code 0 [2024-12-02 15:31:41,630 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/bin/uautomizer-verify-84ZbGMXZE1/cvc4 --incremental --print-success --lang smt [2024-12-02 15:31:41,630 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 15:31:41,630 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 15:31:41,631 INFO L85 PathProgramCache]: Analyzing trace with hash 298193477, now seen corresponding path program 1 times [2024-12-02 15:31:41,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 15:31:41,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [808373214] [2024-12-02 15:31:41,631 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 15:31:41,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:31:41,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 15:31:41,632 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 15:31:41,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-12-02 15:31:41,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 15:31:41,680 INFO L256 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-12-02 15:31:41,681 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 15:31:42,989 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-12-02 15:31:42,989 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 15:31:42,989 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 15:31:42,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808373214] [2024-12-02 15:31:42,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808373214] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 15:31:42,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 15:31:42,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-12-02 15:31:42,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358305011] [2024-12-02 15:31:42,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 15:31:42,990 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-12-02 15:31:42,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 15:31:42,990 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-12-02 15:31:42,991 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2024-12-02 15:31:42,991 INFO L87 Difference]: Start difference. First operand 372 states and 528 transitions. Second operand has 11 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-12-02 15:31:45,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 15:31:45,735 INFO L93 Difference]: Finished difference Result 427 states and 603 transitions. [2024-12-02 15:31:45,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-12-02 15:31:45,735 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 43 [2024-12-02 15:31:45,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 15:31:45,737 INFO L225 Difference]: With dead ends: 427 [2024-12-02 15:31:45,737 INFO L226 Difference]: Without dead ends: 340 [2024-12-02 15:31:45,738 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2024-12-02 15:31:45,738 INFO L435 NwaCegarLoop]: 141 mSDtfsCounter, 58 mSDsluCounter, 1165 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 1306 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2024-12-02 15:31:45,738 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 1306 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2024-12-02 15:31:45,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2024-12-02 15:31:45,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 332. [2024-12-02 15:31:45,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 287 states have (on average 1.3414634146341464) internal successors, (385), 292 states have internal predecessors, (385), 36 states have call successors, (36), 5 states have call predecessors, (36), 8 states have return successors, (47), 43 states have call predecessors, (47), 35 states have call successors, (47) [2024-12-02 15:31:45,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 468 transitions. [2024-12-02 15:31:45,752 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 468 transitions. Word has length 43 [2024-12-02 15:31:45,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 15:31:45,752 INFO L471 AbstractCegarLoop]: Abstraction has 332 states and 468 transitions. [2024-12-02 15:31:45,752 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-12-02 15:31:45,752 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 468 transitions. [2024-12-02 15:31:45,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-12-02 15:31:45,753 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 15:31:45,753 INFO L218 NwaCegarLoop]: trace histogram [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] [2024-12-02 15:31:45,759 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-12-02 15:31:45,954 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:31:45,954 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 15:31:45,954 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 15:31:45,954 INFO L85 PathProgramCache]: Analyzing trace with hash 1216750209, now seen corresponding path program 1 times [2024-12-02 15:31:45,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 15:31:45,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1981365975] [2024-12-02 15:31:45,954 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 15:31:45,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:31:45,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 15:31:45,956 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 15:31:45,957 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-12-02 15:31:46,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 15:31:46,003 INFO L256 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-12-02 15:31:46,004 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 15:31:46,627 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-12-02 15:31:46,627 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 15:31:46,627 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 15:31:46,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981365975] [2024-12-02 15:31:46,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981365975] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 15:31:46,627 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 15:31:46,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-12-02 15:31:46,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043977317] [2024-12-02 15:31:46,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 15:31:46,627 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-12-02 15:31:46,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 15:31:46,628 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-12-02 15:31:46,628 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-12-02 15:31:46,628 INFO L87 Difference]: Start difference. First operand 332 states and 468 transitions. Second operand has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 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) [2024-12-02 15:31:47,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 15:31:47,427 INFO L93 Difference]: Finished difference Result 348 states and 485 transitions. [2024-12-02 15:31:47,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-12-02 15:31:47,428 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 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 [2024-12-02 15:31:47,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 15:31:47,429 INFO L225 Difference]: With dead ends: 348 [2024-12-02 15:31:47,429 INFO L226 Difference]: Without dead ends: 346 [2024-12-02 15:31:47,430 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-12-02 15:31:47,430 INFO L435 NwaCegarLoop]: 101 mSDtfsCounter, 3 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 479 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-12-02 15:31:47,430 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 479 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-12-02 15:31:47,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2024-12-02 15:31:47,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 338. [2024-12-02 15:31:47,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 291 states have (on average 1.3402061855670102) internal successors, (390), 297 states have internal predecessors, (390), 37 states have call successors, (37), 6 states have call predecessors, (37), 9 states have return successors, (48), 43 states have call predecessors, (48), 36 states have call successors, (48) [2024-12-02 15:31:47,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 475 transitions. [2024-12-02 15:31:47,453 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 475 transitions. Word has length 43 [2024-12-02 15:31:47,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 15:31:47,453 INFO L471 AbstractCegarLoop]: Abstraction has 338 states and 475 transitions. [2024-12-02 15:31:47,454 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 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) [2024-12-02 15:31:47,454 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 475 transitions. [2024-12-02 15:31:47,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-12-02 15:31:47,455 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 15:31:47,455 INFO L218 NwaCegarLoop]: trace histogram [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] [2024-12-02 15:31:47,465 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-12-02 15:31:47,655 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:31:47,655 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 15:31:47,656 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 15:31:47,656 INFO L85 PathProgramCache]: Analyzing trace with hash 1274008511, now seen corresponding path program 1 times [2024-12-02 15:31:47,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 15:31:47,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1342550629] [2024-12-02 15:31:47,656 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 15:31:47,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:31:47,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 15:31:47,658 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 15:31:47,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-12-02 15:31:47,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 15:31:47,710 INFO L256 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-12-02 15:31:47,711 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 15:31:48,315 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-12-02 15:31:48,315 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 15:31:48,315 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 15:31:48,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342550629] [2024-12-02 15:31:48,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342550629] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 15:31:48,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 15:31:48,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-12-02 15:31:48,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379843098] [2024-12-02 15:31:48,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 15:31:48,315 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-12-02 15:31:48,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 15:31:48,315 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-12-02 15:31:48,316 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-12-02 15:31:48,316 INFO L87 Difference]: Start difference. First operand 338 states and 475 transitions. Second operand has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 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) [2024-12-02 15:31:48,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 15:31:48,943 INFO L93 Difference]: Finished difference Result 344 states and 480 transitions. [2024-12-02 15:31:48,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-12-02 15:31:48,944 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 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 [2024-12-02 15:31:48,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 15:31:48,945 INFO L225 Difference]: With dead ends: 344 [2024-12-02 15:31:48,945 INFO L226 Difference]: Without dead ends: 342 [2024-12-02 15:31:48,946 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-12-02 15:31:48,946 INFO L435 NwaCegarLoop]: 96 mSDtfsCounter, 3 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-12-02 15:31:48,946 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 459 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-12-02 15:31:48,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2024-12-02 15:31:48,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 336. [2024-12-02 15:31:48,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 290 states have (on average 1.3379310344827586) internal successors, (388), 295 states have internal predecessors, (388), 36 states have call successors, (36), 6 states have call predecessors, (36), 9 states have return successors, (47), 43 states have call predecessors, (47), 35 states have call successors, (47) [2024-12-02 15:31:48,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 471 transitions. [2024-12-02 15:31:48,959 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 471 transitions. Word has length 43 [2024-12-02 15:31:48,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 15:31:48,960 INFO L471 AbstractCegarLoop]: Abstraction has 336 states and 471 transitions. [2024-12-02 15:31:48,960 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 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) [2024-12-02 15:31:48,960 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 471 transitions. [2024-12-02 15:31:48,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-12-02 15:31:48,961 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 15:31:48,961 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2024-12-02 15:31:48,967 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-12-02 15:31:49,161 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:31:49,161 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 15:31:49,161 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 15:31:49,162 INFO L85 PathProgramCache]: Analyzing trace with hash 1825297549, now seen corresponding path program 1 times [2024-12-02 15:31:49,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 15:31:49,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [251601426] [2024-12-02 15:31:49,162 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 15:31:49,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:31:49,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 15:31:49,163 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 15:31:49,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-12-02 15:31:49,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 15:31:49,206 INFO L256 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-12-02 15:31:49,207 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 15:31:49,459 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-12-02 15:31:49,460 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 15:31:49,460 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 15:31:49,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251601426] [2024-12-02 15:31:49,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251601426] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 15:31:49,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 15:31:49,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-12-02 15:31:49,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767088817] [2024-12-02 15:31:49,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 15:31:49,460 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 15:31:49,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 15:31:49,461 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 15:31:49,461 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-12-02 15:31:49,461 INFO L87 Difference]: Start difference. First operand 336 states and 471 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 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) [2024-12-02 15:31:49,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 15:31:49,598 INFO L93 Difference]: Finished difference Result 453 states and 648 transitions. [2024-12-02 15:31:49,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 15:31:49,598 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 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 44 [2024-12-02 15:31:49,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 15:31:49,601 INFO L225 Difference]: With dead ends: 453 [2024-12-02 15:31:49,601 INFO L226 Difference]: Without dead ends: 358 [2024-12-02 15:31:49,601 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-12-02 15:31:49,601 INFO L435 NwaCegarLoop]: 109 mSDtfsCounter, 13 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 15:31:49,602 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 310 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 15:31:49,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2024-12-02 15:31:49,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 358. [2024-12-02 15:31:49,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 312 states have (on average 1.2980769230769231) internal successors, (405), 314 states have internal predecessors, (405), 36 states have call successors, (36), 6 states have call predecessors, (36), 9 states have return successors, (47), 43 states have call predecessors, (47), 35 states have call successors, (47) [2024-12-02 15:31:49,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 488 transitions. [2024-12-02 15:31:49,613 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 488 transitions. Word has length 44 [2024-12-02 15:31:49,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 15:31:49,613 INFO L471 AbstractCegarLoop]: Abstraction has 358 states and 488 transitions. [2024-12-02 15:31:49,614 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 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) [2024-12-02 15:31:49,614 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 488 transitions. [2024-12-02 15:31:49,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-12-02 15:31:49,614 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 15:31:49,614 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2024-12-02 15:31:49,622 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-12-02 15:31:49,815 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:31:49,815 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 15:31:49,815 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 15:31:49,815 INFO L85 PathProgramCache]: Analyzing trace with hash -1865760906, now seen corresponding path program 1 times [2024-12-02 15:31:49,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 15:31:49,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [846345393] [2024-12-02 15:31:49,815 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 15:31:49,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:31:49,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 15:31:49,817 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 15:31:49,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-12-02 15:31:49,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 15:31:49,865 INFO L256 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-12-02 15:31:49,866 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 15:31:49,985 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-12-02 15:31:49,985 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 15:31:49,986 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 15:31:49,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846345393] [2024-12-02 15:31:49,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846345393] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 15:31:49,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 15:31:49,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-12-02 15:31:49,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910639515] [2024-12-02 15:31:49,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 15:31:49,986 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 15:31:49,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 15:31:49,987 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 15:31:49,987 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-12-02 15:31:49,987 INFO L87 Difference]: Start difference. First operand 358 states and 488 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 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) [2024-12-02 15:31:50,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 15:31:50,098 INFO L93 Difference]: Finished difference Result 371 states and 503 transitions. [2024-12-02 15:31:50,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 15:31:50,098 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 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 45 [2024-12-02 15:31:50,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 15:31:50,099 INFO L225 Difference]: With dead ends: 371 [2024-12-02 15:31:50,099 INFO L226 Difference]: Without dead ends: 364 [2024-12-02 15:31:50,099 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-12-02 15:31:50,100 INFO L435 NwaCegarLoop]: 97 mSDtfsCounter, 0 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 15:31:50,100 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 285 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 15:31:50,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2024-12-02 15:31:50,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 364. [2024-12-02 15:31:50,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 318 states have (on average 1.2924528301886793) internal successors, (411), 320 states have internal predecessors, (411), 36 states have call successors, (36), 6 states have call predecessors, (36), 9 states have return successors, (47), 43 states have call predecessors, (47), 35 states have call successors, (47) [2024-12-02 15:31:50,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 494 transitions. [2024-12-02 15:31:50,111 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 494 transitions. Word has length 45 [2024-12-02 15:31:50,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 15:31:50,111 INFO L471 AbstractCegarLoop]: Abstraction has 364 states and 494 transitions. [2024-12-02 15:31:50,111 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 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) [2024-12-02 15:31:50,111 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 494 transitions. [2024-12-02 15:31:50,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-12-02 15:31:50,112 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 15:31:50,112 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2024-12-02 15:31:50,118 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-12-02 15:31:50,313 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:31:50,313 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 15:31:50,313 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 15:31:50,313 INFO L85 PathProgramCache]: Analyzing trace with hash -90753544, now seen corresponding path program 1 times [2024-12-02 15:31:50,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 15:31:50,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1935922475] [2024-12-02 15:31:50,313 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 15:31:50,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:31:50,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 15:31:50,315 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 15:31:50,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-12-02 15:31:50,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 15:31:50,358 INFO L256 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-12-02 15:31:50,358 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 15:31:50,578 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-12-02 15:31:50,578 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 15:31:50,578 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 15:31:50,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935922475] [2024-12-02 15:31:50,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935922475] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 15:31:50,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 15:31:50,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-12-02 15:31:50,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875609364] [2024-12-02 15:31:50,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 15:31:50,579 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-02 15:31:50,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 15:31:50,580 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-02 15:31:50,580 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-12-02 15:31:50,580 INFO L87 Difference]: Start difference. First operand 364 states and 494 transitions. Second operand has 5 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 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) [2024-12-02 15:31:50,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 15:31:50,793 INFO L93 Difference]: Finished difference Result 371 states and 500 transitions. [2024-12-02 15:31:50,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 15:31:50,794 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 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 45 [2024-12-02 15:31:50,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 15:31:50,795 INFO L225 Difference]: With dead ends: 371 [2024-12-02 15:31:50,795 INFO L226 Difference]: Without dead ends: 364 [2024-12-02 15:31:50,796 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-12-02 15:31:50,796 INFO L435 NwaCegarLoop]: 97 mSDtfsCounter, 3 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 15:31:50,796 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 378 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 15:31:50,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2024-12-02 15:31:50,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 358. [2024-12-02 15:31:50,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 312 states have (on average 1.2852564102564104) internal successors, (401), 314 states have internal predecessors, (401), 36 states have call successors, (36), 6 states have call predecessors, (36), 9 states have return successors, (47), 43 states have call predecessors, (47), 35 states have call successors, (47) [2024-12-02 15:31:50,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 484 transitions. [2024-12-02 15:31:50,815 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 484 transitions. Word has length 45 [2024-12-02 15:31:50,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 15:31:50,816 INFO L471 AbstractCegarLoop]: Abstraction has 358 states and 484 transitions. [2024-12-02 15:31:50,816 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 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) [2024-12-02 15:31:50,816 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 484 transitions. [2024-12-02 15:31:50,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-12-02 15:31:50,816 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 15:31:50,816 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2024-12-02 15:31:50,824 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-12-02 15:31:51,017 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:31:51,017 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 15:31:51,017 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 15:31:51,017 INFO L85 PathProgramCache]: Analyzing trace with hash -1172209497, now seen corresponding path program 1 times [2024-12-02 15:31:51,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 15:31:51,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1033197226] [2024-12-02 15:31:51,018 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 15:31:51,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:31:51,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 15:31:51,019 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 15:31:51,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-12-02 15:31:51,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 15:31:51,062 INFO L256 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-12-02 15:31:51,063 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 15:31:51,278 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-12-02 15:31:51,278 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 15:31:51,278 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 15:31:51,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033197226] [2024-12-02 15:31:51,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033197226] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 15:31:51,278 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 15:31:51,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-12-02 15:31:51,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323456287] [2024-12-02 15:31:51,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 15:31:51,278 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 15:31:51,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 15:31:51,278 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 15:31:51,279 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-12-02 15:31:51,279 INFO L87 Difference]: Start difference. First operand 358 states and 484 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 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) [2024-12-02 15:31:51,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 15:31:51,398 INFO L93 Difference]: Finished difference Result 390 states and 525 transitions. [2024-12-02 15:31:51,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 15:31:51,399 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 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 45 [2024-12-02 15:31:51,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 15:31:51,400 INFO L225 Difference]: With dead ends: 390 [2024-12-02 15:31:51,400 INFO L226 Difference]: Without dead ends: 353 [2024-12-02 15:31:51,400 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-12-02 15:31:51,400 INFO L435 NwaCegarLoop]: 94 mSDtfsCounter, 15 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 15:31:51,400 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 277 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 15:31:51,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2024-12-02 15:31:51,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 342. [2024-12-02 15:31:51,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 300 states have (on average 1.2733333333333334) internal successors, (382), 300 states have internal predecessors, (382), 32 states have call successors, (32), 6 states have call predecessors, (32), 9 states have return successors, (43), 39 states have call predecessors, (43), 31 states have call successors, (43) [2024-12-02 15:31:51,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 457 transitions. [2024-12-02 15:31:51,411 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 457 transitions. Word has length 45 [2024-12-02 15:31:51,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 15:31:51,411 INFO L471 AbstractCegarLoop]: Abstraction has 342 states and 457 transitions. [2024-12-02 15:31:51,411 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 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) [2024-12-02 15:31:51,411 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 457 transitions. [2024-12-02 15:31:51,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-12-02 15:31:51,412 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 15:31:51,412 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] [2024-12-02 15:31:51,417 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-12-02 15:31:51,612 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:31:51,612 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 15:31:51,613 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 15:31:51,613 INFO L85 PathProgramCache]: Analyzing trace with hash 1292164715, now seen corresponding path program 1 times [2024-12-02 15:31:51,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 15:31:51,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [765330885] [2024-12-02 15:31:51,613 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 15:31:51,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:31:51,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 15:31:51,614 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 15:31:51,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-12-02 15:31:51,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 15:31:51,657 INFO L256 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-12-02 15:31:51,658 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 15:31:54,030 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-12-02 15:31:54,031 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 15:31:59,329 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-12-02 15:31:59,329 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 15:31:59,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765330885] [2024-12-02 15:31:59,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765330885] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 15:31:59,329 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-12-02 15:31:59,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 25 [2024-12-02 15:31:59,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091044641] [2024-12-02 15:31:59,330 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-12-02 15:31:59,330 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-12-02 15:31:59,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 15:31:59,331 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-12-02 15:31:59,331 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2024-12-02 15:31:59,331 INFO L87 Difference]: Start difference. First operand 342 states and 457 transitions. Second operand has 25 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 20 states have internal predecessors, (52), 6 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 6 states have call predecessors, (7), 4 states have call successors, (7) [2024-12-02 15:32:12,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 15:32:12,675 INFO L93 Difference]: Finished difference Result 358 states and 477 transitions. [2024-12-02 15:32:12,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-12-02 15:32:12,676 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 20 states have internal predecessors, (52), 6 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 6 states have call predecessors, (7), 4 states have call successors, (7) Word has length 49 [2024-12-02 15:32:12,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 15:32:12,678 INFO L225 Difference]: With dead ends: 358 [2024-12-02 15:32:12,678 INFO L226 Difference]: Without dead ends: 356 [2024-12-02 15:32:12,678 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=120, Invalid=1002, Unknown=0, NotChecked=0, Total=1122 [2024-12-02 15:32:12,679 INFO L435 NwaCegarLoop]: 136 mSDtfsCounter, 113 mSDsluCounter, 1996 mSDsCounter, 0 mSdLazyCounter, 1207 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 2132 SdHoareTripleChecker+Invalid, 1219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.0s IncrementalHoareTripleChecker+Time [2024-12-02 15:32:12,679 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 2132 Invalid, 1219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1207 Invalid, 0 Unknown, 0 Unchecked, 11.0s Time] [2024-12-02 15:32:12,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2024-12-02 15:32:12,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 352. [2024-12-02 15:32:12,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 305 states have (on average 1.2688524590163934) internal successors, (387), 307 states have internal predecessors, (387), 36 states have call successors, (36), 7 states have call predecessors, (36), 10 states have return successors, (47), 41 states have call predecessors, (47), 35 states have call successors, (47) [2024-12-02 15:32:12,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 470 transitions. [2024-12-02 15:32:12,696 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 470 transitions. Word has length 49 [2024-12-02 15:32:12,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 15:32:12,696 INFO L471 AbstractCegarLoop]: Abstraction has 352 states and 470 transitions. [2024-12-02 15:32:12,696 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 20 states have internal predecessors, (52), 6 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 6 states have call predecessors, (7), 4 states have call successors, (7) [2024-12-02 15:32:12,696 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 470 transitions. [2024-12-02 15:32:12,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-12-02 15:32:12,697 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 15:32:12,697 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2024-12-02 15:32:12,703 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-12-02 15:32:12,897 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:32:12,897 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 15:32:12,898 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 15:32:12,898 INFO L85 PathProgramCache]: Analyzing trace with hash 1030672807, now seen corresponding path program 1 times [2024-12-02 15:32:12,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 15:32:12,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1608882268] [2024-12-02 15:32:12,898 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 15:32:12,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:32:12,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 15:32:12,900 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 15:32:12,901 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-12-02 15:32:12,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-12-02 15:32:12,952 INFO L357 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-12-02 15:32:12,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-12-02 15:32:12,992 INFO L130 FreeRefinementEngine]: Strategy FOX found a feasible trace [2024-12-02 15:32:12,992 INFO L340 BasicCegarLoop]: Counterexample is feasible [2024-12-02 15:32:12,993 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2024-12-02 15:32:12,995 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2024-12-02 15:32:13,001 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-12-02 15:32:13,195 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:32:13,198 INFO L422 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 15:32:13,220 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2024-12-02 15:32:13,222 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.12 03:32:13 BoogieIcfgContainer [2024-12-02 15:32:13,223 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-12-02 15:32:13,223 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-12-02 15:32:13,223 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-12-02 15:32:13,223 INFO L274 PluginConnector]: Witness Printer initialized [2024-12-02 15:32:13,223 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 03:27:43" (3/4) ... [2024-12-02 15:32:13,224 INFO L140 WitnessPrinter]: Generating witness for reachability counterexample [2024-12-02 15:32:13,269 INFO L129 tionWitnessGenerator]: Generated YAML witness of length 29. [2024-12-02 15:32:13,328 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/bin/uautomizer-verify-84ZbGMXZE1/witness.graphml [2024-12-02 15:32:13,328 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/bin/uautomizer-verify-84ZbGMXZE1/witness.yml [2024-12-02 15:32:13,328 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-12-02 15:32:13,329 INFO L158 Benchmark]: Toolchain (without parser) took 275483.93ms. Allocated memory is still 92.3MB. Free memory was 69.2MB in the beginning and 38.6MB in the end (delta: 30.7MB). Peak memory consumption was 33.3MB. Max. memory is 16.1GB. [2024-12-02 15:32:13,329 INFO L158 Benchmark]: CDTParser took 0.52ms. Allocated memory is still 83.9MB. Free memory is still 47.6MB. There was no memory consumed. Max. memory is 16.1GB. [2024-12-02 15:32:13,329 INFO L158 Benchmark]: CACSL2BoogieTranslator took 367.23ms. Allocated memory is still 92.3MB. Free memory was 69.0MB in the beginning and 53.5MB in the end (delta: 15.5MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2024-12-02 15:32:13,329 INFO L158 Benchmark]: Boogie Procedure Inliner took 46.78ms. Allocated memory is still 92.3MB. Free memory was 53.5MB in the beginning and 51.8MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. [2024-12-02 15:32:13,330 INFO L158 Benchmark]: Boogie Preprocessor took 53.74ms. Allocated memory is still 92.3MB. Free memory was 51.8MB in the beginning and 49.4MB in the end (delta: 2.4MB). There was no memory consumed. Max. memory is 16.1GB. [2024-12-02 15:32:13,330 INFO L158 Benchmark]: RCFGBuilder took 4863.68ms. Allocated memory is still 92.3MB. Free memory was 49.4MB in the beginning and 59.6MB in the end (delta: -10.1MB). Peak memory consumption was 20.4MB. Max. memory is 16.1GB. [2024-12-02 15:32:13,330 INFO L158 Benchmark]: TraceAbstraction took 270040.34ms. Allocated memory is still 92.3MB. Free memory was 58.9MB in the beginning and 44.9MB in the end (delta: 14.0MB). Peak memory consumption was 12.9MB. Max. memory is 16.1GB. [2024-12-02 15:32:13,330 INFO L158 Benchmark]: Witness Printer took 105.27ms. Allocated memory is still 92.3MB. Free memory was 44.9MB in the beginning and 38.6MB in the end (delta: 6.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-12-02 15:32:13,332 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.52ms. Allocated memory is still 83.9MB. Free memory is still 47.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 367.23ms. Allocated memory is still 92.3MB. Free memory was 69.0MB in the beginning and 53.5MB in the end (delta: 15.5MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 46.78ms. Allocated memory is still 92.3MB. Free memory was 53.5MB in the beginning and 51.8MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 53.74ms. Allocated memory is still 92.3MB. Free memory was 51.8MB in the beginning and 49.4MB in the end (delta: 2.4MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 4863.68ms. Allocated memory is still 92.3MB. Free memory was 49.4MB in the beginning and 59.6MB in the end (delta: -10.1MB). Peak memory consumption was 20.4MB. Max. memory is 16.1GB. * TraceAbstraction took 270040.34ms. Allocated memory is still 92.3MB. Free memory was 58.9MB in the beginning and 44.9MB in the end (delta: 14.0MB). Peak memory consumption was 12.9MB. Max. memory is 16.1GB. * Witness Printer took 105.27ms. Allocated memory is still 92.3MB. Free memory was 44.9MB in the beginning and 38.6MB in the end (delta: 6.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 60]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L402] COND FALSE !(__VERIFIER_nondet_int()) [L405] CALL main2() [L269] unsigned int a ; [L270] unsigned int ma = __VERIFIER_nondet_uint(); [L271] signed char ea = __VERIFIER_nondet_char(); [L272] unsigned int b ; [L273] unsigned int mb = __VERIFIER_nondet_uint(); [L274] signed char eb = __VERIFIER_nondet_char(); [L275] unsigned int r_add ; [L276] unsigned int zero ; [L277] int sa ; [L278] int sb ; [L279] int tmp ; [L280] int tmp___0 ; [L281] int tmp___1 ; [L282] int tmp___2 ; [L283] int tmp___3 ; [L284] int tmp___4 ; [L285] int tmp___5 ; [L286] int tmp___6 ; [L287] int tmp___7 ; [L288] int tmp___8 ; [L289] int tmp___9 ; [L290] int __retres23 ; [L294] CALL, EXPR base2flt(0, 0) VAL [\old(e)=0, \old(m)=0] [L68] unsigned int res ; [L69] unsigned int __retres4 ; VAL [\old(e)=0, \old(m)=0, e=0, m=0] [L72] COND TRUE ! m [L73] __retres4 = 0U VAL [\old(e)=0, \old(m)=0, __retres4=0, e=0] [L123] return (__retres4); VAL [\old(e)=0, \old(m)=0, \result=0, e=0] [L294] RET, EXPR base2flt(0, 0) [L294] zero = base2flt(0, 0) [L295] CALL, EXPR base2flt(ma, ea) VAL [\old(e)=127, \old(m)=67108864] [L68] unsigned int res ; [L69] unsigned int __retres4 ; VAL [\old(e)=127, \old(m)=67108864, e=127, m=67108864] [L72] COND FALSE !(! m) VAL [\old(e)=127, \old(m)=67108864, e=127, m=67108864] [L78] COND FALSE !(m < 1U << 24U) VAL [\old(e)=127, \old(m)=67108864, e=127, m=67108864] [L102] COND TRUE m >= 1U << 25U VAL [\old(e)=127, \old(m)=67108864, e=127, m=67108864] [L107] COND TRUE e >= 127 [L108] __retres4 = 4294967295U VAL [\old(e)=127, \old(m)=67108864, __retres4=-1, m=67108864] [L123] return (__retres4); VAL [\old(e)=127, \old(m)=67108864, \result=-1, m=67108864] [L295] RET, EXPR base2flt(ma, ea) VAL [ea=127, ma=67108864, zero=0] [L295] a = base2flt(ma, ea) [L296] CALL, EXPR base2flt(mb, eb) VAL [\old(e)=-16, \old(m)=16777216] [L68] unsigned int res ; [L69] unsigned int __retres4 ; VAL [\old(e)=-16, \old(m)=16777216, e=-16, m=16777216] [L72] COND FALSE !(! m) VAL [\old(e)=-16, \old(m)=16777216, e=-16, m=16777216] [L78] COND FALSE !(m < 1U << 24U) VAL [\old(e)=-16, \old(m)=16777216, e=-16, m=16777216] [L102] COND FALSE !(m >= 1U << 25U) VAL [\old(e)=-16, \old(m)=16777216, e=-16, m=16777216] [L119] m = m & ~ (1U << 24U) [L120] res = m | ((unsigned int )(e + 128) << 24U) [L121] __retres4 = res VAL [\old(e)=-16, \old(m)=16777216, __retres4=1879048192] [L123] return (__retres4); VAL [\old(e)=-16, \old(m)=16777216, \result=1879048192] [L296] RET, EXPR base2flt(mb, eb) VAL [a=-1, ea=127, eb=-16, ma=67108864, mb=16777216, zero=0] [L296] b = base2flt(mb, eb) [L298] COND FALSE !(a < zero) VAL [a=-1, b=1879048192, ea=127, eb=-16, ma=67108864, mb=16777216, zero=0] [L301] COND TRUE a > zero [L302] tmp = 1 VAL [a=-1, b=1879048192, ea=127, eb=-16, ma=67108864, mb=16777216, tmp=1, zero=0] [L306] sa = tmp VAL [a=-1, b=1879048192, ea=127, eb=-16, ma=67108864, mb=16777216, sa=1, zero=0] [L308] COND FALSE !(b < zero) VAL [a=-1, b=1879048192, ea=127, eb=-16, ma=67108864, mb=16777216, sa=1, zero=0] [L311] COND TRUE b > zero [L312] tmp___0 = 1 VAL [a=-1, b=1879048192, ea=127, eb=-16, ma=67108864, mb=16777216, sa=1, tmp___0=1] [L316] sb = tmp___0 VAL [a=-1, b=1879048192, ea=127, eb=-16, ma=67108864, mb=16777216, sa=1, sb=1] [L319] CALL addflt(a, b) [L127] unsigned int res ; [L128] unsigned int ma ; [L129] unsigned int mb ; [L130] unsigned int delta ; [L131] int ea ; [L132] int eb ; [L133] unsigned int tmp ; [L134] unsigned int __retres10 ; VAL [a=-1, b=1879048192] [L137] COND FALSE !(a < b) VAL [a=-1, b=1879048192] [L144] COND FALSE !(! b) [L151] ma = a & ((1U << 24U) - 1U) [L152] ea = (int )(a >> 24U) - 128 [L153] ma = ma | (1U << 24U) [L154] mb = b & ((1U << 24U) - 1U) [L155] eb = (int )(b >> 24U) - 128 [L156] mb = mb | (1U << 24U) VAL [a=-1, ea=127, eb=-16, ma=33554431, mb=16777216] [L157] CALL __VERIFIER_assert(ea >= eb) VAL [\old(cond)=1] [L59] COND FALSE !(!(cond)) VAL [\old(cond)=1] [L157] RET __VERIFIER_assert(ea >= eb) VAL [a=-1, ea=127, eb=-16, ma=33554431, mb=16777216] [L158] delta = ea - eb VAL [a=-1, delta=143, ea=127, ma=33554431, mb=16777216] [L159] CALL __VERIFIER_assert(delta < sizeof(mb) * 8) VAL [\old(cond)=0] [L59] COND TRUE !(cond) VAL [\old(cond)=0] [L60] reach_error() VAL [\old(cond)=0] - UnprovableResult [Line: 48]: Unable to prove that a call to reach_error is unreachable Unable to prove that a call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 79 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 270.0s, OverallIterations: 21, TraceHistogramMax: 3, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 47.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 3 mSolverCounterUnknown, 785 SdHoareTripleChecker+Valid, 42.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 724 mSDsluCounter, 13445 SdHoareTripleChecker+Invalid, 41.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 212 IncrementalHoareTripleChecker+Unchecked, 11224 mSDsCounter, 73 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 3241 IncrementalHoareTripleChecker+Invalid, 3529 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 73 mSolverCounterUnsat, 2221 mSDtfsCounter, 3241 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1096 GetRequests, 934 SyntacticMatches, 3 SemanticMatches, 159 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 33.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=372occurred in iteration=12, InterpolantAutomatonStates: 158, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 20 MinimizatonAttempts, 211 StatesRemovedByMinimization, 15 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 95.0s SatisfiabilityAnalysisTime, 121.9s InterpolantComputationTime, 866 NumberOfCodeBlocks, 849 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 1034 ConstructedInterpolants, 10 QuantifiedInterpolants, 2807 SizeOfPredicates, 35 NumberOfNonLiveVariables, 1529 ConjunctsInSsa, 170 ConjunctsInUnsatCore, 27 InterpolantComputations, 14 PerfectInterpolantSequences, 368/415 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available, ConComCheckerStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2024-12-02 15:32:13,464 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac2d7ab-2b68-4b2b-a92b-dbc6964bbcc8/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE