./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_variablewrapping_wrapper-sp_file-59.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version d790fecc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d049af95-823f-48ed-9319-45538b13d67a/bin/uautomizer-verify-84ZbGMXZE1/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d049af95-823f-48ed-9319-45538b13d67a/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_d049af95-823f-48ed-9319-45538b13d67a/bin/uautomizer-verify-84ZbGMXZE1/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d049af95-823f-48ed-9319-45538b13d67a/bin/uautomizer-verify-84ZbGMXZE1/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_variablewrapping_wrapper-sp_file-59.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d049af95-823f-48ed-9319-45538b13d67a/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_d049af95-823f-48ed-9319-45538b13d67a/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 b230d83c95de2b0a2d65b5c62bdacb0eaf62e204b83623e9d22dd193a3762a9e --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-12-02 07:31:14,471 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-12-02 07:31:14,542 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d049af95-823f-48ed-9319-45538b13d67a/bin/uautomizer-verify-84ZbGMXZE1/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-12-02 07:31:14,548 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-12-02 07:31:14,548 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-12-02 07:31:14,576 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-12-02 07:31:14,576 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-12-02 07:31:14,577 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-12-02 07:31:14,577 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-12-02 07:31:14,577 INFO L153 SettingsManager]: * Use memory slicer=true [2024-12-02 07:31:14,577 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-12-02 07:31:14,577 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-12-02 07:31:14,578 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-12-02 07:31:14,578 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-12-02 07:31:14,578 INFO L153 SettingsManager]: * Use SBE=true [2024-12-02 07:31:14,578 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-12-02 07:31:14,578 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-12-02 07:31:14,578 INFO L153 SettingsManager]: * sizeof long=4 [2024-12-02 07:31:14,579 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-12-02 07:31:14,579 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-12-02 07:31:14,579 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-12-02 07:31:14,579 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-12-02 07:31:14,579 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-12-02 07:31:14,579 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-12-02 07:31:14,579 INFO L153 SettingsManager]: * sizeof long double=12 [2024-12-02 07:31:14,579 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-12-02 07:31:14,579 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-12-02 07:31:14,579 INFO L153 SettingsManager]: * Use constant arrays=true [2024-12-02 07:31:14,580 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-12-02 07:31:14,580 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-12-02 07:31:14,580 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-12-02 07:31:14,580 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-12-02 07:31:14,580 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 07:31:14,580 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-12-02 07:31:14,580 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-12-02 07:31:14,580 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-12-02 07:31:14,580 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-12-02 07:31:14,581 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 07:31:14,581 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-12-02 07:31:14,581 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-12-02 07:31:14,581 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-12-02 07:31:14,581 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-12-02 07:31:14,581 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-12-02 07:31:14,581 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-12-02 07:31:14,581 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-12-02 07:31:14,581 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-12-02 07:31:14,582 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-12-02 07:31:14,582 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-12-02 07:31:14,582 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_d049af95-823f-48ed-9319-45538b13d67a/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 -> b230d83c95de2b0a2d65b5c62bdacb0eaf62e204b83623e9d22dd193a3762a9e [2024-12-02 07:31:14,884 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-12-02 07:31:14,895 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-12-02 07:31:14,898 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-12-02 07:31:14,900 INFO L270 PluginConnector]: Initializing CDTParser... [2024-12-02 07:31:14,900 INFO L274 PluginConnector]: CDTParser initialized [2024-12-02 07:31:14,901 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d049af95-823f-48ed-9319-45538b13d67a/bin/uautomizer-verify-84ZbGMXZE1/../../sv-benchmarks/c/hardness-nfm22/hardness_variablewrapping_wrapper-sp_file-59.i [2024-12-02 07:31:18,082 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d049af95-823f-48ed-9319-45538b13d67a/bin/uautomizer-verify-84ZbGMXZE1/data/917ac9974/79f298d655354f659c5db87e35409bcb/FLAG1fff439d3 [2024-12-02 07:31:18,346 INFO L384 CDTParser]: Found 1 translation units. [2024-12-02 07:31:18,347 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d049af95-823f-48ed-9319-45538b13d67a/sv-benchmarks/c/hardness-nfm22/hardness_variablewrapping_wrapper-sp_file-59.i [2024-12-02 07:31:18,357 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d049af95-823f-48ed-9319-45538b13d67a/bin/uautomizer-verify-84ZbGMXZE1/data/917ac9974/79f298d655354f659c5db87e35409bcb/FLAG1fff439d3 [2024-12-02 07:31:18,376 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d049af95-823f-48ed-9319-45538b13d67a/bin/uautomizer-verify-84ZbGMXZE1/data/917ac9974/79f298d655354f659c5db87e35409bcb [2024-12-02 07:31:18,379 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-12-02 07:31:18,380 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-12-02 07:31:18,382 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-12-02 07:31:18,382 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-12-02 07:31:18,388 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-12-02 07:31:18,389 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 07:31:18" (1/1) ... [2024-12-02 07:31:18,389 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1aa6374f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:31:18, skipping insertion in model container [2024-12-02 07:31:18,390 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 07:31:18" (1/1) ... [2024-12-02 07:31:18,411 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-12-02 07:31:18,577 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_d049af95-823f-48ed-9319-45538b13d67a/sv-benchmarks/c/hardness-nfm22/hardness_variablewrapping_wrapper-sp_file-59.i[917,930] [2024-12-02 07:31:18,629 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-12-02 07:31:18,641 INFO L200 MainTranslator]: Completed pre-run [2024-12-02 07:31:18,651 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_d049af95-823f-48ed-9319-45538b13d67a/sv-benchmarks/c/hardness-nfm22/hardness_variablewrapping_wrapper-sp_file-59.i[917,930] [2024-12-02 07:31:18,678 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-12-02 07:31:18,701 INFO L204 MainTranslator]: Completed translation [2024-12-02 07:31:18,701 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:31:18 WrapperNode [2024-12-02 07:31:18,701 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-12-02 07:31:18,702 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-12-02 07:31:18,702 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-12-02 07:31:18,703 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-12-02 07:31:18,709 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:31:18" (1/1) ... [2024-12-02 07:31:18,718 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:31:18" (1/1) ... [2024-12-02 07:31:18,749 INFO L138 Inliner]: procedures = 27, calls = 126, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 356 [2024-12-02 07:31:18,749 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-12-02 07:31:18,750 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-12-02 07:31:18,750 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-12-02 07:31:18,750 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-12-02 07:31:18,760 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:31:18" (1/1) ... [2024-12-02 07:31:18,761 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:31:18" (1/1) ... [2024-12-02 07:31:18,765 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:31:18" (1/1) ... [2024-12-02 07:31:18,784 INFO L175 MemorySlicer]: Split 97 memory accesses to 2 slices as follows [2, 95]. 98 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 29 writes are split as follows [0, 29]. [2024-12-02 07:31:18,784 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:31:18" (1/1) ... [2024-12-02 07:31:18,785 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:31:18" (1/1) ... [2024-12-02 07:31:18,797 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:31:18" (1/1) ... [2024-12-02 07:31:18,798 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:31:18" (1/1) ... [2024-12-02 07:31:18,802 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:31:18" (1/1) ... [2024-12-02 07:31:18,804 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:31:18" (1/1) ... [2024-12-02 07:31:18,806 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:31:18" (1/1) ... [2024-12-02 07:31:18,810 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-12-02 07:31:18,810 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-12-02 07:31:18,811 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-12-02 07:31:18,811 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-12-02 07:31:18,812 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:31:18" (1/1) ... [2024-12-02 07:31:18,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 07:31:18,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d049af95-823f-48ed-9319-45538b13d67a/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:31:18,845 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d049af95-823f-48ed-9319-45538b13d67a/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-12-02 07:31:18,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d049af95-823f-48ed-9319-45538b13d67a/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-12-02 07:31:18,874 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-12-02 07:31:18,874 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#0 [2024-12-02 07:31:18,874 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#1 [2024-12-02 07:31:18,875 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-12-02 07:31:18,875 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-12-02 07:31:18,875 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-12-02 07:31:18,875 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-12-02 07:31:18,875 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-12-02 07:31:18,875 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-12-02 07:31:18,875 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-12-02 07:31:18,875 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-12-02 07:31:18,875 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-12-02 07:31:18,875 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-12-02 07:31:19,002 INFO L234 CfgBuilder]: Building ICFG [2024-12-02 07:31:19,006 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-12-02 07:31:19,410 INFO L? ?]: Removed 56 outVars from TransFormulas that were not future-live. [2024-12-02 07:31:19,410 INFO L283 CfgBuilder]: Performing block encoding [2024-12-02 07:31:19,420 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-12-02 07:31:19,420 INFO L312 CfgBuilder]: Removed 2 assume(true) statements. [2024-12-02 07:31:19,420 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 07:31:19 BoogieIcfgContainer [2024-12-02 07:31:19,420 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-12-02 07:31:19,422 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-12-02 07:31:19,423 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-12-02 07:31:19,427 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-12-02 07:31:19,427 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 07:31:18" (1/3) ... [2024-12-02 07:31:19,428 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1726090b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 07:31:19, skipping insertion in model container [2024-12-02 07:31:19,428 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:31:18" (2/3) ... [2024-12-02 07:31:19,428 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1726090b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 07:31:19, skipping insertion in model container [2024-12-02 07:31:19,428 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 07:31:19" (3/3) ... [2024-12-02 07:31:19,429 INFO L128 eAbstractionObserver]: Analyzing ICFG hardness_variablewrapping_wrapper-sp_file-59.i [2024-12-02 07:31:19,444 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-12-02 07:31:19,446 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG hardness_variablewrapping_wrapper-sp_file-59.i that has 2 procedures, 84 locations, 1 initial locations, 1 loop locations, and 1 error locations. [2024-12-02 07:31:19,493 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-12-02 07:31:19,503 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;@7912a62, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-12-02 07:31:19,503 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-12-02 07:31:19,507 INFO L276 IsEmpty]: Start isEmpty. Operand has 84 states, 63 states have (on average 1.3650793650793651) internal successors, (86), 64 states have internal predecessors, (86), 18 states have call successors, (18), 1 states have call predecessors, (18), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2024-12-02 07:31:19,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2024-12-02 07:31:19,517 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:31:19,518 INFO L218 NwaCegarLoop]: trace histogram [18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:31:19,519 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 07:31:19,523 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:31:19,523 INFO L85 PathProgramCache]: Analyzing trace with hash 671104331, now seen corresponding path program 1 times [2024-12-02 07:31:19,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:31:19,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917703461] [2024-12-02 07:31:19,531 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:31:19,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:31:19,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:31:19,819 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 578 trivial. 0 not checked. [2024-12-02 07:31:19,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:31:19,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917703461] [2024-12-02 07:31:19,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917703461] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:31:19,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574802580] [2024-12-02 07:31:19,821 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:31:19,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:31:19,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d049af95-823f-48ed-9319-45538b13d67a/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:31:19,823 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d049af95-823f-48ed-9319-45538b13d67a/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:31:19,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d049af95-823f-48ed-9319-45538b13d67a/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-12-02 07:31:20,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:31:20,069 INFO L256 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 1 conjuncts are in the unsatisfiable core [2024-12-02 07:31:20,077 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:31:20,104 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 578 trivial. 0 not checked. [2024-12-02 07:31:20,104 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 07:31:20,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574802580] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:31:20,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-12-02 07:31:20,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2024-12-02 07:31:20,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788293330] [2024-12-02 07:31:20,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:31:20,112 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-12-02 07:31:20,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:31:20,129 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-12-02 07:31:20,130 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-12-02 07:31:20,132 INFO L87 Difference]: Start difference. First operand has 84 states, 63 states have (on average 1.3650793650793651) internal successors, (86), 64 states have internal predecessors, (86), 18 states have call successors, (18), 1 states have call predecessors, (18), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) Second operand has 2 states, 2 states have (on average 23.0) internal successors, (46), 2 states have internal predecessors, (46), 2 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (18), 1 states have call predecessors, (18), 2 states have call successors, (18) [2024-12-02 07:31:20,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:31:20,155 INFO L93 Difference]: Finished difference Result 161 states and 256 transitions. [2024-12-02 07:31:20,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-12-02 07:31:20,157 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 23.0) internal successors, (46), 2 states have internal predecessors, (46), 2 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (18), 1 states have call predecessors, (18), 2 states have call successors, (18) Word has length 131 [2024-12-02 07:31:20,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:31:20,163 INFO L225 Difference]: With dead ends: 161 [2024-12-02 07:31:20,163 INFO L226 Difference]: Without dead ends: 80 [2024-12-02 07:31:20,166 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 132 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 07:31:20,168 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 07:31:20,169 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 07:31:20,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2024-12-02 07:31:20,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2024-12-02 07:31:20,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 60 states have (on average 1.3166666666666667) internal successors, (79), 60 states have internal predecessors, (79), 18 states have call successors, (18), 1 states have call predecessors, (18), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2024-12-02 07:31:20,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 115 transitions. [2024-12-02 07:31:20,206 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 115 transitions. Word has length 131 [2024-12-02 07:31:20,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:31:20,207 INFO L471 AbstractCegarLoop]: Abstraction has 80 states and 115 transitions. [2024-12-02 07:31:20,207 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 23.0) internal successors, (46), 2 states have internal predecessors, (46), 2 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (18), 1 states have call predecessors, (18), 2 states have call successors, (18) [2024-12-02 07:31:20,207 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 115 transitions. [2024-12-02 07:31:20,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2024-12-02 07:31:20,211 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:31:20,211 INFO L218 NwaCegarLoop]: trace histogram [18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:31:20,219 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d049af95-823f-48ed-9319-45538b13d67a/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-12-02 07:31:20,411 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d049af95-823f-48ed-9319-45538b13d67a/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:31:20,412 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 07:31:20,412 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:31:20,413 INFO L85 PathProgramCache]: Analyzing trace with hash 244988199, now seen corresponding path program 1 times [2024-12-02 07:31:20,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:31:20,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569916275] [2024-12-02 07:31:20,413 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:31:20,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:31:20,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:31:21,716 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2024-12-02 07:31:21,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:31:21,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569916275] [2024-12-02 07:31:21,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569916275] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:31:21,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 07:31:21,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-12-02 07:31:21,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390857180] [2024-12-02 07:31:21,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:31:21,718 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 07:31:21,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:31:21,719 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 07:31:21,719 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-12-02 07:31:21,720 INFO L87 Difference]: Start difference. First operand 80 states and 115 transitions. Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 1 states have call successors, (18), 1 states have call predecessors, (18), 1 states have return successors, (18), 1 states have call predecessors, (18), 1 states have call successors, (18) [2024-12-02 07:31:22,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:31:22,210 INFO L93 Difference]: Finished difference Result 235 states and 340 transitions. [2024-12-02 07:31:22,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 07:31:22,211 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 1 states have call successors, (18), 1 states have call predecessors, (18), 1 states have return successors, (18), 1 states have call predecessors, (18), 1 states have call successors, (18) Word has length 131 [2024-12-02 07:31:22,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:31:22,214 INFO L225 Difference]: With dead ends: 235 [2024-12-02 07:31:22,214 INFO L226 Difference]: Without dead ends: 158 [2024-12-02 07:31:22,215 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-12-02 07:31:22,216 INFO L435 NwaCegarLoop]: 78 mSDtfsCounter, 76 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-12-02 07:31:22,217 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 235 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-12-02 07:31:22,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2024-12-02 07:31:22,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 148. [2024-12-02 07:31:22,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 109 states have (on average 1.3027522935779816) internal successors, (142), 109 states have internal predecessors, (142), 36 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2024-12-02 07:31:22,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 214 transitions. [2024-12-02 07:31:22,255 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 214 transitions. Word has length 131 [2024-12-02 07:31:22,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:31:22,255 INFO L471 AbstractCegarLoop]: Abstraction has 148 states and 214 transitions. [2024-12-02 07:31:22,256 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 1 states have call successors, (18), 1 states have call predecessors, (18), 1 states have return successors, (18), 1 states have call predecessors, (18), 1 states have call successors, (18) [2024-12-02 07:31:22,256 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 214 transitions. [2024-12-02 07:31:22,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2024-12-02 07:31:22,258 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:31:22,258 INFO L218 NwaCegarLoop]: trace histogram [18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:31:22,259 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-12-02 07:31:22,259 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 07:31:22,259 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:31:22,260 INFO L85 PathProgramCache]: Analyzing trace with hash 2109018711, now seen corresponding path program 1 times [2024-12-02 07:31:22,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:31:22,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647608953] [2024-12-02 07:31:22,260 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:31:22,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:31:22,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:31:22,413 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2024-12-02 07:31:22,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:31:22,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647608953] [2024-12-02 07:31:22,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647608953] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:31:22,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 07:31:22,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-12-02 07:31:22,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225984564] [2024-12-02 07:31:22,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:31:22,415 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 07:31:22,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:31:22,416 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 07:31:22,416 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 07:31:22,416 INFO L87 Difference]: Start difference. First operand 148 states and 214 transitions. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 1 states have call successors, (18), 1 states have call predecessors, (18), 1 states have return successors, (18), 1 states have call predecessors, (18), 1 states have call successors, (18) [2024-12-02 07:31:22,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:31:22,449 INFO L93 Difference]: Finished difference Result 248 states and 363 transitions. [2024-12-02 07:31:22,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 07:31:22,450 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 1 states have call successors, (18), 1 states have call predecessors, (18), 1 states have return successors, (18), 1 states have call predecessors, (18), 1 states have call successors, (18) Word has length 133 [2024-12-02 07:31:22,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:31:22,452 INFO L225 Difference]: With dead ends: 248 [2024-12-02 07:31:22,453 INFO L226 Difference]: Without dead ends: 150 [2024-12-02 07:31:22,453 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 07:31:22,454 INFO L435 NwaCegarLoop]: 114 mSDtfsCounter, 0 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 07:31:22,455 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 222 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 07:31:22,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2024-12-02 07:31:22,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2024-12-02 07:31:22,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 111 states have (on average 1.2972972972972974) internal successors, (144), 111 states have internal predecessors, (144), 36 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2024-12-02 07:31:22,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 216 transitions. [2024-12-02 07:31:22,488 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 216 transitions. Word has length 133 [2024-12-02 07:31:22,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:31:22,489 INFO L471 AbstractCegarLoop]: Abstraction has 150 states and 216 transitions. [2024-12-02 07:31:22,489 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 1 states have call successors, (18), 1 states have call predecessors, (18), 1 states have return successors, (18), 1 states have call predecessors, (18), 1 states have call successors, (18) [2024-12-02 07:31:22,490 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 216 transitions. [2024-12-02 07:31:22,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2024-12-02 07:31:22,492 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:31:22,492 INFO L218 NwaCegarLoop]: trace histogram [18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:31:22,492 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-12-02 07:31:22,493 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 07:31:22,493 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:31:22,493 INFO L85 PathProgramCache]: Analyzing trace with hash 114874005, now seen corresponding path program 1 times [2024-12-02 07:31:22,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:31:22,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619376659] [2024-12-02 07:31:22,494 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:31:22,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:31:22,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:31:23,858 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2024-12-02 07:31:23,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:31:23,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619376659] [2024-12-02 07:31:23,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619376659] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:31:23,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 07:31:23,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-12-02 07:31:23,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213473195] [2024-12-02 07:31:23,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:31:23,860 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-12-02 07:31:23,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:31:23,861 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-12-02 07:31:23,861 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-12-02 07:31:23,861 INFO L87 Difference]: Start difference. First operand 150 states and 216 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 3 states have call successors, (18), 1 states have call predecessors, (18), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2024-12-02 07:31:24,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:31:24,230 INFO L93 Difference]: Finished difference Result 244 states and 354 transitions. [2024-12-02 07:31:24,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 07:31:24,230 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 3 states have call successors, (18), 1 states have call predecessors, (18), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 133 [2024-12-02 07:31:24,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:31:24,233 INFO L225 Difference]: With dead ends: 244 [2024-12-02 07:31:24,233 INFO L226 Difference]: Without dead ends: 150 [2024-12-02 07:31:24,233 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-12-02 07:31:24,234 INFO L435 NwaCegarLoop]: 85 mSDtfsCounter, 44 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-12-02 07:31:24,235 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 162 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-12-02 07:31:24,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2024-12-02 07:31:24,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2024-12-02 07:31:24,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 111 states have (on average 1.2882882882882882) internal successors, (143), 111 states have internal predecessors, (143), 36 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2024-12-02 07:31:24,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 215 transitions. [2024-12-02 07:31:24,265 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 215 transitions. Word has length 133 [2024-12-02 07:31:24,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:31:24,266 INFO L471 AbstractCegarLoop]: Abstraction has 150 states and 215 transitions. [2024-12-02 07:31:24,266 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 3 states have call successors, (18), 1 states have call predecessors, (18), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2024-12-02 07:31:24,266 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 215 transitions. [2024-12-02 07:31:24,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2024-12-02 07:31:24,268 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:31:24,269 INFO L218 NwaCegarLoop]: trace histogram [18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:31:24,269 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-12-02 07:31:24,269 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 07:31:24,269 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:31:24,270 INFO L85 PathProgramCache]: Analyzing trace with hash -471932009, now seen corresponding path program 1 times [2024-12-02 07:31:24,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:31:24,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441084965] [2024-12-02 07:31:24,270 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:31:24,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:31:24,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:31:24,826 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2024-12-02 07:31:24,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:31:24,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441084965] [2024-12-02 07:31:24,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441084965] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:31:24,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 07:31:24,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-12-02 07:31:24,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43069355] [2024-12-02 07:31:24,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:31:24,827 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-12-02 07:31:24,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:31:24,828 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-12-02 07:31:24,828 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-12-02 07:31:24,828 INFO L87 Difference]: Start difference. First operand 150 states and 215 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 1 states have call successors, (18), 1 states have call predecessors, (18), 1 states have return successors, (18), 1 states have call predecessors, (18), 1 states have call successors, (18) [2024-12-02 07:31:25,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:31:25,186 INFO L93 Difference]: Finished difference Result 268 states and 386 transitions. [2024-12-02 07:31:25,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-12-02 07:31:25,187 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 1 states have call successors, (18), 1 states have call predecessors, (18), 1 states have return successors, (18), 1 states have call predecessors, (18), 1 states have call successors, (18) Word has length 133 [2024-12-02 07:31:25,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:31:25,190 INFO L225 Difference]: With dead ends: 268 [2024-12-02 07:31:25,190 INFO L226 Difference]: Without dead ends: 177 [2024-12-02 07:31:25,191 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-12-02 07:31:25,192 INFO L435 NwaCegarLoop]: 92 mSDtfsCounter, 137 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-12-02 07:31:25,192 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 172 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-12-02 07:31:25,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2024-12-02 07:31:25,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 153. [2024-12-02 07:31:25,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 114 states have (on average 1.280701754385965) internal successors, (146), 114 states have internal predecessors, (146), 36 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2024-12-02 07:31:25,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 218 transitions. [2024-12-02 07:31:25,226 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 218 transitions. Word has length 133 [2024-12-02 07:31:25,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:31:25,226 INFO L471 AbstractCegarLoop]: Abstraction has 153 states and 218 transitions. [2024-12-02 07:31:25,226 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 1 states have call successors, (18), 1 states have call predecessors, (18), 1 states have return successors, (18), 1 states have call predecessors, (18), 1 states have call successors, (18) [2024-12-02 07:31:25,226 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 218 transitions. [2024-12-02 07:31:25,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2024-12-02 07:31:25,228 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:31:25,229 INFO L218 NwaCegarLoop]: trace histogram [18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:31:25,229 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-12-02 07:31:25,229 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 07:31:25,229 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:31:25,229 INFO L85 PathProgramCache]: Analyzing trace with hash -864959019, now seen corresponding path program 1 times [2024-12-02 07:31:25,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:31:25,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179134743] [2024-12-02 07:31:25,230 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:31:25,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:31:25,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:31:28,731 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2024-12-02 07:31:28,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:31:28,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179134743] [2024-12-02 07:31:28,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179134743] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:31:28,731 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 07:31:28,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-12-02 07:31:28,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347372354] [2024-12-02 07:31:28,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:31:28,732 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-12-02 07:31:28,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:31:28,733 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-12-02 07:31:28,733 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-12-02 07:31:28,733 INFO L87 Difference]: Start difference. First operand 153 states and 218 transitions. Second operand has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 states have internal predecessors, (46), 3 states have call successors, (18), 1 states have call predecessors, (18), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2024-12-02 07:31:29,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:31:29,733 INFO L93 Difference]: Finished difference Result 368 states and 527 transitions. [2024-12-02 07:31:29,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-12-02 07:31:29,733 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 states have internal predecessors, (46), 3 states have call successors, (18), 1 states have call predecessors, (18), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 133 [2024-12-02 07:31:29,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:31:29,736 INFO L225 Difference]: With dead ends: 368 [2024-12-02 07:31:29,736 INFO L226 Difference]: Without dead ends: 281 [2024-12-02 07:31:29,737 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2024-12-02 07:31:29,738 INFO L435 NwaCegarLoop]: 72 mSDtfsCounter, 227 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 493 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-12-02 07:31:29,738 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [227 Valid, 493 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 480 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-12-02 07:31:29,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2024-12-02 07:31:29,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 242. [2024-12-02 07:31:29,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 184 states have (on average 1.2934782608695652) internal successors, (238), 184 states have internal predecessors, (238), 54 states have call successors, (54), 3 states have call predecessors, (54), 3 states have return successors, (54), 54 states have call predecessors, (54), 54 states have call successors, (54) [2024-12-02 07:31:29,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 346 transitions. [2024-12-02 07:31:29,784 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 346 transitions. Word has length 133 [2024-12-02 07:31:29,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:31:29,785 INFO L471 AbstractCegarLoop]: Abstraction has 242 states and 346 transitions. [2024-12-02 07:31:29,785 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 states have internal predecessors, (46), 3 states have call successors, (18), 1 states have call predecessors, (18), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2024-12-02 07:31:29,785 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 346 transitions. [2024-12-02 07:31:29,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2024-12-02 07:31:29,787 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:31:29,787 INFO L218 NwaCegarLoop]: trace histogram [18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:31:29,787 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-12-02 07:31:29,788 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 07:31:29,788 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:31:29,788 INFO L85 PathProgramCache]: Analyzing trace with hash -184900649, now seen corresponding path program 1 times [2024-12-02 07:31:29,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:31:29,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715645002] [2024-12-02 07:31:29,788 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:31:29,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:31:29,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:31:30,230 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2024-12-02 07:31:30,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:31:30,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715645002] [2024-12-02 07:31:30,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715645002] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:31:30,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 07:31:30,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-12-02 07:31:30,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939798472] [2024-12-02 07:31:30,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:31:30,232 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-02 07:31:30,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:31:30,232 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-02 07:31:30,233 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-12-02 07:31:30,233 INFO L87 Difference]: Start difference. First operand 242 states and 346 transitions. Second operand has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 1 states have call successors, (18), 1 states have call predecessors, (18), 1 states have return successors, (18), 1 states have call predecessors, (18), 1 states have call successors, (18) [2024-12-02 07:31:30,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:31:30,558 INFO L93 Difference]: Finished difference Result 465 states and 667 transitions. [2024-12-02 07:31:30,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 07:31:30,559 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 1 states have call successors, (18), 1 states have call predecessors, (18), 1 states have return successors, (18), 1 states have call predecessors, (18), 1 states have call successors, (18) Word has length 133 [2024-12-02 07:31:30,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:31:30,562 INFO L225 Difference]: With dead ends: 465 [2024-12-02 07:31:30,562 INFO L226 Difference]: Without dead ends: 288 [2024-12-02 07:31:30,563 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-12-02 07:31:30,564 INFO L435 NwaCegarLoop]: 84 mSDtfsCounter, 74 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-12-02 07:31:30,564 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 294 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-12-02 07:31:30,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2024-12-02 07:31:30,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 254. [2024-12-02 07:31:30,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 196 states have (on average 1.2959183673469388) internal successors, (254), 196 states have internal predecessors, (254), 54 states have call successors, (54), 3 states have call predecessors, (54), 3 states have return successors, (54), 54 states have call predecessors, (54), 54 states have call successors, (54) [2024-12-02 07:31:30,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 362 transitions. [2024-12-02 07:31:30,609 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 362 transitions. Word has length 133 [2024-12-02 07:31:30,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:31:30,610 INFO L471 AbstractCegarLoop]: Abstraction has 254 states and 362 transitions. [2024-12-02 07:31:30,610 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 1 states have call successors, (18), 1 states have call predecessors, (18), 1 states have return successors, (18), 1 states have call predecessors, (18), 1 states have call successors, (18) [2024-12-02 07:31:30,610 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 362 transitions. [2024-12-02 07:31:30,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2024-12-02 07:31:30,612 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:31:30,612 INFO L218 NwaCegarLoop]: trace histogram [18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:31:30,612 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-12-02 07:31:30,612 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 07:31:30,613 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:31:30,613 INFO L85 PathProgramCache]: Analyzing trace with hash -606793581, now seen corresponding path program 1 times [2024-12-02 07:31:30,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:31:30,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799469573] [2024-12-02 07:31:30,613 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:31:30,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:31:30,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:31:30,900 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2024-12-02 07:31:30,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:31:30,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799469573] [2024-12-02 07:31:30,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799469573] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:31:30,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 07:31:30,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-12-02 07:31:30,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625674523] [2024-12-02 07:31:30,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:31:30,901 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-02 07:31:30,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:31:30,902 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-02 07:31:30,902 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-12-02 07:31:30,902 INFO L87 Difference]: Start difference. First operand 254 states and 362 transitions. Second operand has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 1 states have call successors, (18), 1 states have call predecessors, (18), 1 states have return successors, (18), 1 states have call predecessors, (18), 1 states have call successors, (18) [2024-12-02 07:31:31,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:31:31,223 INFO L93 Difference]: Finished difference Result 475 states and 679 transitions. [2024-12-02 07:31:31,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-12-02 07:31:31,224 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 1 states have call successors, (18), 1 states have call predecessors, (18), 1 states have return successors, (18), 1 states have call predecessors, (18), 1 states have call successors, (18) Word has length 133 [2024-12-02 07:31:31,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:31:31,226 INFO L225 Difference]: With dead ends: 475 [2024-12-02 07:31:31,226 INFO L226 Difference]: Without dead ends: 283 [2024-12-02 07:31:31,227 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-12-02 07:31:31,228 INFO L435 NwaCegarLoop]: 84 mSDtfsCounter, 77 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-12-02 07:31:31,228 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 294 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-12-02 07:31:31,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2024-12-02 07:31:31,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 249. [2024-12-02 07:31:31,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 191 states have (on average 1.287958115183246) internal successors, (246), 191 states have internal predecessors, (246), 54 states have call successors, (54), 3 states have call predecessors, (54), 3 states have return successors, (54), 54 states have call predecessors, (54), 54 states have call successors, (54) [2024-12-02 07:31:31,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 354 transitions. [2024-12-02 07:31:31,260 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 354 transitions. Word has length 133 [2024-12-02 07:31:31,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:31:31,261 INFO L471 AbstractCegarLoop]: Abstraction has 249 states and 354 transitions. [2024-12-02 07:31:31,261 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 1 states have call successors, (18), 1 states have call predecessors, (18), 1 states have return successors, (18), 1 states have call predecessors, (18), 1 states have call successors, (18) [2024-12-02 07:31:31,261 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 354 transitions. [2024-12-02 07:31:31,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2024-12-02 07:31:31,263 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:31:31,263 INFO L218 NwaCegarLoop]: trace histogram [18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:31:31,263 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-12-02 07:31:31,263 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 07:31:31,264 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:31:31,264 INFO L85 PathProgramCache]: Analyzing trace with hash 417983591, now seen corresponding path program 1 times [2024-12-02 07:31:31,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:31:31,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469816810] [2024-12-02 07:31:31,264 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:31:31,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:31:31,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:31:31,667 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2024-12-02 07:31:31,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:31:31,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469816810] [2024-12-02 07:31:31,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469816810] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:31:31,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 07:31:31,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-12-02 07:31:31,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936625144] [2024-12-02 07:31:31,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:31:31,668 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-12-02 07:31:31,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:31:31,668 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-12-02 07:31:31,668 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-12-02 07:31:31,669 INFO L87 Difference]: Start difference. First operand 249 states and 354 transitions. Second operand has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 9 states have internal predecessors, (48), 1 states have call successors, (18), 1 states have call predecessors, (18), 1 states have return successors, (18), 1 states have call predecessors, (18), 1 states have call successors, (18) [2024-12-02 07:31:32,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:31:32,099 INFO L93 Difference]: Finished difference Result 529 states and 752 transitions. [2024-12-02 07:31:32,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-12-02 07:31:32,099 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 9 states have internal predecessors, (48), 1 states have call successors, (18), 1 states have call predecessors, (18), 1 states have return successors, (18), 1 states have call predecessors, (18), 1 states have call successors, (18) Word has length 135 [2024-12-02 07:31:32,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:31:32,101 INFO L225 Difference]: With dead ends: 529 [2024-12-02 07:31:32,102 INFO L226 Difference]: Without dead ends: 352 [2024-12-02 07:31:32,102 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2024-12-02 07:31:32,103 INFO L435 NwaCegarLoop]: 99 mSDtfsCounter, 107 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-12-02 07:31:32,103 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 477 Invalid, 368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 366 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-12-02 07:31:32,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2024-12-02 07:31:32,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 305. [2024-12-02 07:31:32,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 247 states have (on average 1.2995951417004048) internal successors, (321), 247 states have internal predecessors, (321), 54 states have call successors, (54), 3 states have call predecessors, (54), 3 states have return successors, (54), 54 states have call predecessors, (54), 54 states have call successors, (54) [2024-12-02 07:31:32,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 429 transitions. [2024-12-02 07:31:32,136 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 429 transitions. Word has length 135 [2024-12-02 07:31:32,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:31:32,137 INFO L471 AbstractCegarLoop]: Abstraction has 305 states and 429 transitions. [2024-12-02 07:31:32,137 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 9 states have internal predecessors, (48), 1 states have call successors, (18), 1 states have call predecessors, (18), 1 states have return successors, (18), 1 states have call predecessors, (18), 1 states have call successors, (18) [2024-12-02 07:31:32,137 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 429 transitions. [2024-12-02 07:31:32,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2024-12-02 07:31:32,139 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:31:32,139 INFO L218 NwaCegarLoop]: trace histogram [18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:31:32,139 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-12-02 07:31:32,139 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 07:31:32,139 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:31:32,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1890331904, now seen corresponding path program 1 times [2024-12-02 07:31:32,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:31:32,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804942182] [2024-12-02 07:31:32,140 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:31:32,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:31:32,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-12-02 07:31:32,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1174280606] [2024-12-02 07:31:32,223 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:31:32,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:31:32,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d049af95-823f-48ed-9319-45538b13d67a/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:31:32,226 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d049af95-823f-48ed-9319-45538b13d67a/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:31:32,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d049af95-823f-48ed-9319-45538b13d67a/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-12-02 07:31:32,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:31:32,457 INFO L256 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 66 conjuncts are in the unsatisfiable core [2024-12-02 07:31:32,471 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:31:32,553 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 42 [2024-12-02 07:31:33,004 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 88 [2024-12-02 07:31:33,892 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 88 [2024-12-02 07:31:34,668 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 88 [2024-12-02 07:31:35,467 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 114 treesize of output 85 [2024-12-02 07:31:36,236 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 114 treesize of output 85 [2024-12-02 07:31:37,197 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 114 treesize of output 85 [2024-12-02 07:31:38,170 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 114 treesize of output 85 [2024-12-02 07:31:38,975 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 114 treesize of output 85 [2024-12-02 07:31:39,657 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 114 treesize of output 85 [2024-12-02 07:31:41,048 INFO L349 Elim1Store]: treesize reduction 60, result has 46.4 percent of original size [2024-12-02 07:31:41,048 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 224 treesize of output 207 [2024-12-02 07:32:09,368 WARN L286 SmtUtils]: Spent 8.89s on a formula simplification that was a NOOP. DAG size: 529 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-12-02 07:37:09,786 WARN L286 SmtUtils]: Spent 4.88m on a formula simplification. DAG size of input: 3568 DAG size of output: 364 (called from [L 346] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2024-12-02 07:37:09,786 INFO L349 Elim1Store]: treesize reduction 6920, result has 9.0 percent of original size [2024-12-02 07:37:09,788 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 41 select indices, 41 select index equivalence classes, 0 disjoint index pairs (out of 820 index pairs), introduced 41 new quantified variables, introduced 860 case distinctions, treesize of input 7587 treesize of output 6402 [2024-12-02 07:40:50,697 WARN L286 SmtUtils]: Spent 6.82s on a formula simplification. DAG size of input: 1406 DAG size of output: 1407 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-12-02 07:41:44,417 WARN L286 SmtUtils]: Spent 8.75s on a formula simplification. DAG size of input: 1404 DAG size of output: 1413 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-12-02 07:43:49,973 WARN L286 SmtUtils]: Spent 18.06s on a formula simplification. DAG size of input: 1410 DAG size of output: 1413 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-12-02 07:45:57,307 WARN L286 SmtUtils]: Spent 12.15s on a formula simplification. DAG size of input: 1404 DAG size of output: 1403 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)