./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/bitvector/soft_float_4-2a.c.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 826ab2ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/config/AutomizerReach.xml -i ../../sv-benchmarks/c/bitvector/soft_float_4-2a.c.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd --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 2abfa4882ab8ec6bd7a33a5fbeaa8a88ba40a897019218fc162e52833c89454b --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-13 15:33:45,214 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-13 15:33:45,302 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-13 15:33:45,307 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-13 15:33:45,307 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-13 15:33:45,345 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-13 15:33:45,346 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-13 15:33:45,346 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-13 15:33:45,347 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-13 15:33:45,347 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-13 15:33:45,348 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-13 15:33:45,349 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-13 15:33:45,349 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-13 15:33:45,349 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-13 15:33:45,349 INFO L153 SettingsManager]: * Use SBE=true [2024-11-13 15:33:45,350 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-13 15:33:45,350 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-13 15:33:45,350 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-13 15:33:45,350 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-13 15:33:45,350 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-13 15:33:45,350 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-13 15:33:45,350 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-13 15:33:45,350 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-13 15:33:45,350 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-13 15:33:45,350 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-13 15:33:45,350 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-13 15:33:45,350 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-13 15:33:45,350 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-13 15:33:45,351 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-13 15:33:45,351 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-13 15:33:45,351 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-13 15:33:45,351 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-13 15:33:45,351 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-13 15:33:45,351 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-13 15:33:45,351 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-13 15:33:45,351 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-13 15:33:45,351 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-13 15:33:45,351 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-13 15:33:45,353 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-13 15:33:45,353 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-13 15:33:45,353 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-13 15:33:45,353 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-13 15:33:45,353 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_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd 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 -> 2abfa4882ab8ec6bd7a33a5fbeaa8a88ba40a897019218fc162e52833c89454b [2024-11-13 15:33:45,681 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-13 15:33:45,694 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-13 15:33:45,697 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-13 15:33:45,699 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-13 15:33:45,699 INFO L274 PluginConnector]: CDTParser initialized [2024-11-13 15:33:45,702 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/../../sv-benchmarks/c/bitvector/soft_float_4-2a.c.cil.c Unable to find full path for "g++" [2024-11-13 15:33:47,747 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-13 15:33:48,132 INFO L384 CDTParser]: Found 1 translation units. [2024-11-13 15:33:48,134 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/sv-benchmarks/c/bitvector/soft_float_4-2a.c.cil.c [2024-11-13 15:33:48,148 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/data/227abd303/8e5ae6cb12a3433ea8afc485ea74f8b8/FLAGc7c670231 [2024-11-13 15:33:48,339 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/data/227abd303/8e5ae6cb12a3433ea8afc485ea74f8b8 [2024-11-13 15:33:48,342 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-13 15:33:48,345 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-13 15:33:48,347 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-13 15:33:48,347 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-13 15:33:48,352 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-13 15:33:48,354 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 03:33:48" (1/1) ... [2024-11-13 15:33:48,355 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d759ae1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:33:48, skipping insertion in model container [2024-11-13 15:33:48,358 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 03:33:48" (1/1) ... [2024-11-13 15:33:48,391 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-13 15:33:48,610 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_23498b9a-7e35-4dcc-9f1b-e2881d99462b/sv-benchmarks/c/bitvector/soft_float_4-2a.c.cil.c[755,768] [2024-11-13 15:33:48,690 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 15:33:48,705 INFO L200 MainTranslator]: Completed pre-run [2024-11-13 15:33:48,715 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_23498b9a-7e35-4dcc-9f1b-e2881d99462b/sv-benchmarks/c/bitvector/soft_float_4-2a.c.cil.c[755,768] [2024-11-13 15:33:48,759 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 15:33:48,774 INFO L204 MainTranslator]: Completed translation [2024-11-13 15:33:48,774 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:33:48 WrapperNode [2024-11-13 15:33:48,775 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-13 15:33:48,776 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-13 15:33:48,776 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-13 15:33:48,776 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-13 15:33:48,782 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:33:48" (1/1) ... [2024-11-13 15:33:48,790 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:33:48" (1/1) ... [2024-11-13 15:33:48,809 INFO L138 Inliner]: procedures = 17, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 56 [2024-11-13 15:33:48,809 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-13 15:33:48,810 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-13 15:33:48,810 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-13 15:33:48,810 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-13 15:33:48,821 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:33:48" (1/1) ... [2024-11-13 15:33:48,822 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:33:48" (1/1) ... [2024-11-13 15:33:48,827 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:33:48" (1/1) ... [2024-11-13 15:33:48,858 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-11-13 15:33:48,859 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:33:48" (1/1) ... [2024-11-13 15:33:48,859 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:33:48" (1/1) ... [2024-11-13 15:33:48,872 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:33:48" (1/1) ... [2024-11-13 15:33:48,881 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:33:48" (1/1) ... [2024-11-13 15:33:48,887 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:33:48" (1/1) ... [2024-11-13 15:33:48,889 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:33:48" (1/1) ... [2024-11-13 15:33:48,894 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-13 15:33:48,895 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-13 15:33:48,895 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-13 15:33:48,895 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-13 15:33:48,900 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:33:48" (1/1) ... [2024-11-13 15:33:48,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-13 15:33:48,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:33:48,951 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-13 15:33:48,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-13 15:33:48,991 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-13 15:33:48,992 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-13 15:33:48,993 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2024-11-13 15:33:48,993 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2024-11-13 15:33:48,993 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-13 15:33:48,993 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-13 15:33:48,993 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2024-11-13 15:33:48,993 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2024-11-13 15:33:48,994 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-13 15:33:48,994 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-13 15:33:49,116 INFO L238 CfgBuilder]: Building ICFG [2024-11-13 15:33:49,119 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-13 15:33:49,590 INFO L? ?]: Removed 52 outVars from TransFormulas that were not future-live. [2024-11-13 15:33:49,590 INFO L287 CfgBuilder]: Performing block encoding [2024-11-13 15:33:49,603 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-13 15:33:49,604 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-13 15:33:49,604 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 03:33:49 BoogieIcfgContainer [2024-11-13 15:33:49,604 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-13 15:33:49,607 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-13 15:33:49,607 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-13 15:33:49,613 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-13 15:33:49,613 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 03:33:48" (1/3) ... [2024-11-13 15:33:49,614 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50c00889 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 03:33:49, skipping insertion in model container [2024-11-13 15:33:49,614 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:33:48" (2/3) ... [2024-11-13 15:33:49,615 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50c00889 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 03:33:49, skipping insertion in model container [2024-11-13 15:33:49,616 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 03:33:49" (3/3) ... [2024-11-13 15:33:49,619 INFO L112 eAbstractionObserver]: Analyzing ICFG soft_float_4-2a.c.cil.c [2024-11-13 15:33:49,640 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-13 15:33:49,645 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG soft_float_4-2a.c.cil.c that has 4 procedures, 78 locations, 1 initial locations, 2 loop locations, and 1 error locations. [2024-11-13 15:33:49,725 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-13 15:33:49,740 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;@679d773c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-13 15:33:49,740 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-13 15:33:49,747 INFO L276 IsEmpty]: Start isEmpty. Operand has 78 states, 65 states have (on average 1.5076923076923077) internal successors, (98), 66 states have internal predecessors, (98), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-13 15:33:49,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-13 15:33:49,759 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:33:49,760 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:33:49,760 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:33:49,766 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:33:49,768 INFO L85 PathProgramCache]: Analyzing trace with hash 1827877998, now seen corresponding path program 1 times [2024-11-13 15:33:49,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:33:49,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947982871] [2024-11-13 15:33:49,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:33:49,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:33:49,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:33:50,461 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 15:33:50,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:33:50,476 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-13 15:33:50,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:33:50,537 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-11-13 15:33:50,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:33:50,549 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-13 15:33:50,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:33:50,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947982871] [2024-11-13 15:33:50,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947982871] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:33:50,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221035755] [2024-11-13 15:33:50,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:33:50,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:33:50,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:33:50,554 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:33:50,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-13 15:33:50,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:33:50,669 INFO L255 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-13 15:33:50,677 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:33:50,819 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-13 15:33:50,819 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 15:33:50,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221035755] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:33:50,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-13 15:33:50,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 12 [2024-11-13 15:33:50,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412446179] [2024-11-13 15:33:50,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:33:50,832 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-13 15:33:50,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:33:50,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-13 15:33:50,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2024-11-13 15:33:50,863 INFO L87 Difference]: Start difference. First operand has 78 states, 65 states have (on average 1.5076923076923077) internal successors, (98), 66 states have internal predecessors, (98), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 15:33:51,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:33:51,033 INFO L93 Difference]: Finished difference Result 173 states and 263 transitions. [2024-11-13 15:33:51,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-13 15:33:51,036 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 35 [2024-11-13 15:33:51,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:33:51,046 INFO L225 Difference]: With dead ends: 173 [2024-11-13 15:33:51,046 INFO L226 Difference]: Without dead ends: 92 [2024-11-13 15:33:51,050 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2024-11-13 15:33:51,053 INFO L432 NwaCegarLoop]: 100 mSDtfsCounter, 14 mSDsluCounter, 589 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 689 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 15:33:51,054 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 689 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 15:33:51,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2024-11-13 15:33:51,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 85. [2024-11-13 15:33:51,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 70 states have (on average 1.3571428571428572) internal successors, (95), 72 states have internal predecessors, (95), 9 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (11), 8 states have call predecessors, (11), 8 states have call successors, (11) [2024-11-13 15:33:51,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 115 transitions. [2024-11-13 15:33:51,115 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 115 transitions. Word has length 35 [2024-11-13 15:33:51,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:33:51,115 INFO L471 AbstractCegarLoop]: Abstraction has 85 states and 115 transitions. [2024-11-13 15:33:51,116 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 15:33:51,116 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 115 transitions. [2024-11-13 15:33:51,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-13 15:33:51,118 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:33:51,118 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:33:51,138 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-13 15:33:51,319 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2024-11-13 15:33:51,319 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:33:51,320 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:33:51,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1461895106, now seen corresponding path program 1 times [2024-11-13 15:33:51,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:33:51,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789146992] [2024-11-13 15:33:51,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:33:51,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:33:51,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:33:51,696 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 15:33:51,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:33:51,701 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-13 15:33:51,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:33:51,758 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-11-13 15:33:51,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:33:51,775 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-13 15:33:51,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:33:51,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789146992] [2024-11-13 15:33:51,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789146992] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:33:51,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288062812] [2024-11-13 15:33:51,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:33:51,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:33:51,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:33:51,781 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:33:51,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-13 15:33:51,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:33:51,905 INFO L255 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-13 15:33:51,908 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:33:52,140 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-13 15:33:52,140 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 15:33:52,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288062812] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:33:52,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-13 15:33:52,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [9] total 17 [2024-11-13 15:33:52,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608547560] [2024-11-13 15:33:52,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:33:52,144 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-13 15:33:52,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:33:52,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-13 15:33:52,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2024-11-13 15:33:52,146 INFO L87 Difference]: Start difference. First operand 85 states and 115 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 15:33:52,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:33:52,505 INFO L93 Difference]: Finished difference Result 204 states and 282 transitions. [2024-11-13 15:33:52,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-13 15:33:52,506 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 39 [2024-11-13 15:33:52,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:33:52,509 INFO L225 Difference]: With dead ends: 204 [2024-11-13 15:33:52,509 INFO L226 Difference]: Without dead ends: 159 [2024-11-13 15:33:52,510 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2024-11-13 15:33:52,514 INFO L432 NwaCegarLoop]: 165 mSDtfsCounter, 120 mSDsluCounter, 1188 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 1353 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-13 15:33:52,515 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 1353 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-13 15:33:52,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2024-11-13 15:33:52,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 124. [2024-11-13 15:33:52,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 104 states have (on average 1.3557692307692308) internal successors, (141), 107 states have internal predecessors, (141), 12 states have call successors, (12), 5 states have call predecessors, (12), 7 states have return successors, (17), 11 states have call predecessors, (17), 11 states have call successors, (17) [2024-11-13 15:33:52,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 170 transitions. [2024-11-13 15:33:52,545 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 170 transitions. Word has length 39 [2024-11-13 15:33:52,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:33:52,545 INFO L471 AbstractCegarLoop]: Abstraction has 124 states and 170 transitions. [2024-11-13 15:33:52,550 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 15:33:52,550 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 170 transitions. [2024-11-13 15:33:52,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-13 15:33:52,552 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:33:52,552 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:33:52,576 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-13 15:33:52,752 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:33:52,752 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:33:52,753 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:33:52,753 INFO L85 PathProgramCache]: Analyzing trace with hash -1854922116, now seen corresponding path program 1 times [2024-11-13 15:33:52,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:33:52,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536934151] [2024-11-13 15:33:52,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:33:52,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:33:52,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:33:53,021 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 15:33:53,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:33:53,026 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-13 15:33:53,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:33:53,083 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-11-13 15:33:53,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:33:53,096 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-13 15:33:53,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:33:53,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536934151] [2024-11-13 15:33:53,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536934151] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:33:53,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338298363] [2024-11-13 15:33:53,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:33:53,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:33:53,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:33:53,101 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:33:53,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-13 15:33:53,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:33:53,190 INFO L255 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-13 15:33:53,192 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:33:53,386 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-13 15:33:53,387 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:33:54,054 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-13 15:33:54,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338298363] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:33:54,054 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 15:33:54,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12, 13] total 26 [2024-11-13 15:33:54,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760083379] [2024-11-13 15:33:54,055 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 15:33:54,055 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-13 15:33:54,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:33:54,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-13 15:33:54,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2024-11-13 15:33:54,058 INFO L87 Difference]: Start difference. First operand 124 states and 170 transitions. Second operand has 26 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 19 states have internal predecessors, (45), 6 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-13 15:33:54,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:33:54,656 INFO L93 Difference]: Finished difference Result 281 states and 388 transitions. [2024-11-13 15:33:54,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-13 15:33:54,657 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 19 states have internal predecessors, (45), 6 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 3 states have call successors, (6) Word has length 39 [2024-11-13 15:33:54,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:33:54,660 INFO L225 Difference]: With dead ends: 281 [2024-11-13 15:33:54,660 INFO L226 Difference]: Without dead ends: 205 [2024-11-13 15:33:54,663 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=134, Invalid=922, Unknown=0, NotChecked=0, Total=1056 [2024-11-13 15:33:54,664 INFO L432 NwaCegarLoop]: 110 mSDtfsCounter, 79 mSDsluCounter, 1424 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 1534 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-13 15:33:54,664 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 1534 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-13 15:33:54,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2024-11-13 15:33:54,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 185. [2024-11-13 15:33:54,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 154 states have (on average 1.3246753246753247) internal successors, (204), 157 states have internal predecessors, (204), 19 states have call successors, (19), 9 states have call predecessors, (19), 11 states have return successors, (26), 18 states have call predecessors, (26), 18 states have call successors, (26) [2024-11-13 15:33:54,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 249 transitions. [2024-11-13 15:33:54,705 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 249 transitions. Word has length 39 [2024-11-13 15:33:54,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:33:54,706 INFO L471 AbstractCegarLoop]: Abstraction has 185 states and 249 transitions. [2024-11-13 15:33:54,706 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 19 states have internal predecessors, (45), 6 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-13 15:33:54,706 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 249 transitions. [2024-11-13 15:33:54,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-13 15:33:54,711 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:33:54,711 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:33:54,738 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-13 15:33:54,911 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:33:54,912 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:33:54,912 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:33:54,912 INFO L85 PathProgramCache]: Analyzing trace with hash 146975985, now seen corresponding path program 1 times [2024-11-13 15:33:54,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:33:54,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984756233] [2024-11-13 15:33:54,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:33:54,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:33:54,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:33:55,186 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 15:33:55,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:33:55,190 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-13 15:33:55,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:33:55,194 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-11-13 15:33:55,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:33:55,233 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-11-13 15:33:55,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:33:55,241 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-13 15:33:55,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:33:55,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984756233] [2024-11-13 15:33:55,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984756233] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:33:55,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 15:33:55,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-13 15:33:55,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255060909] [2024-11-13 15:33:55,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:33:55,242 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-13 15:33:55,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:33:55,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-13 15:33:55,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-11-13 15:33:55,243 INFO L87 Difference]: Start difference. First operand 185 states and 249 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-13 15:33:55,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:33:55,398 INFO L93 Difference]: Finished difference Result 306 states and 414 transitions. [2024-11-13 15:33:55,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-13 15:33:55,399 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 43 [2024-11-13 15:33:55,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:33:55,401 INFO L225 Difference]: With dead ends: 306 [2024-11-13 15:33:55,402 INFO L226 Difference]: Without dead ends: 237 [2024-11-13 15:33:55,403 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-11-13 15:33:55,404 INFO L432 NwaCegarLoop]: 120 mSDtfsCounter, 85 mSDsluCounter, 781 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 901 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 15:33:55,404 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 901 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 15:33:55,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2024-11-13 15:33:55,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 228. [2024-11-13 15:33:55,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 191 states have (on average 1.3298429319371727) internal successors, (254), 194 states have internal predecessors, (254), 23 states have call successors, (23), 11 states have call predecessors, (23), 13 states have return successors, (30), 22 states have call predecessors, (30), 22 states have call successors, (30) [2024-11-13 15:33:55,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 307 transitions. [2024-11-13 15:33:55,430 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 307 transitions. Word has length 43 [2024-11-13 15:33:55,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:33:55,431 INFO L471 AbstractCegarLoop]: Abstraction has 228 states and 307 transitions. [2024-11-13 15:33:55,431 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-13 15:33:55,431 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 307 transitions. [2024-11-13 15:33:55,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-13 15:33:55,434 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:33:55,434 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:33:55,434 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-13 15:33:55,434 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:33:55,435 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:33:55,435 INFO L85 PathProgramCache]: Analyzing trace with hash 216236684, now seen corresponding path program 1 times [2024-11-13 15:33:55,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:33:55,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035443321] [2024-11-13 15:33:55,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:33:55,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:33:55,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:33:55,604 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 15:33:55,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:33:55,608 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-13 15:33:55,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:33:55,646 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-11-13 15:33:55,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:33:55,678 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-11-13 15:33:55,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:33:55,689 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-11-13 15:33:55,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:33:55,794 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-13 15:33:55,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:33:55,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035443321] [2024-11-13 15:33:55,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035443321] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:33:55,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 15:33:55,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-11-13 15:33:55,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986882707] [2024-11-13 15:33:55,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:33:55,796 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-13 15:33:55,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:33:55,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-13 15:33:55,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-11-13 15:33:55,797 INFO L87 Difference]: Start difference. First operand 228 states and 307 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-13 15:33:55,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:33:55,950 INFO L93 Difference]: Finished difference Result 321 states and 430 transitions. [2024-11-13 15:33:55,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-13 15:33:55,951 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 44 [2024-11-13 15:33:55,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:33:55,954 INFO L225 Difference]: With dead ends: 321 [2024-11-13 15:33:55,955 INFO L226 Difference]: Without dead ends: 306 [2024-11-13 15:33:55,955 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-11-13 15:33:55,957 INFO L432 NwaCegarLoop]: 103 mSDtfsCounter, 61 mSDsluCounter, 600 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 703 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 15:33:55,957 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 703 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 15:33:55,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2024-11-13 15:33:56,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 228. [2024-11-13 15:33:56,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 191 states have (on average 1.324607329842932) internal successors, (253), 194 states have internal predecessors, (253), 23 states have call successors, (23), 11 states have call predecessors, (23), 13 states have return successors, (30), 22 states have call predecessors, (30), 22 states have call successors, (30) [2024-11-13 15:33:56,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 306 transitions. [2024-11-13 15:33:56,012 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 306 transitions. Word has length 44 [2024-11-13 15:33:56,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:33:56,012 INFO L471 AbstractCegarLoop]: Abstraction has 228 states and 306 transitions. [2024-11-13 15:33:56,012 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-13 15:33:56,012 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 306 transitions. [2024-11-13 15:33:56,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-13 15:33:56,014 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:33:56,014 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:33:56,014 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-13 15:33:56,014 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:33:56,015 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:33:56,015 INFO L85 PathProgramCache]: Analyzing trace with hash 917301262, now seen corresponding path program 1 times [2024-11-13 15:33:56,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:33:56,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486857879] [2024-11-13 15:33:56,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:33:56,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:33:56,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:33:56,331 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 15:33:56,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:33:56,336 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-13 15:33:56,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:33:56,378 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-11-13 15:33:56,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:33:56,396 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-11-13 15:33:56,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:33:56,486 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-11-13 15:33:56,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:33:56,535 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-13 15:33:56,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:33:56,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486857879] [2024-11-13 15:33:56,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486857879] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:33:56,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 15:33:56,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2024-11-13 15:33:56,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088815521] [2024-11-13 15:33:56,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:33:56,537 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-13 15:33:56,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:33:56,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-13 15:33:56,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2024-11-13 15:33:56,538 INFO L87 Difference]: Start difference. First operand 228 states and 306 transitions. Second operand has 15 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 5 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2024-11-13 15:33:56,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:33:56,880 INFO L93 Difference]: Finished difference Result 323 states and 430 transitions. [2024-11-13 15:33:56,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-13 15:33:56,881 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 5 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 44 [2024-11-13 15:33:56,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:33:56,883 INFO L225 Difference]: With dead ends: 323 [2024-11-13 15:33:56,883 INFO L226 Difference]: Without dead ends: 315 [2024-11-13 15:33:56,888 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2024-11-13 15:33:56,890 INFO L432 NwaCegarLoop]: 109 mSDtfsCounter, 52 mSDsluCounter, 1267 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 1376 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-13 15:33:56,890 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 1376 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-13 15:33:56,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2024-11-13 15:33:56,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 231. [2024-11-13 15:33:56,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 194 states have (on average 1.3195876288659794) internal successors, (256), 196 states have internal predecessors, (256), 23 states have call successors, (23), 11 states have call predecessors, (23), 13 states have return successors, (30), 23 states have call predecessors, (30), 22 states have call successors, (30) [2024-11-13 15:33:56,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 309 transitions. [2024-11-13 15:33:56,928 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 309 transitions. Word has length 44 [2024-11-13 15:33:56,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:33:56,928 INFO L471 AbstractCegarLoop]: Abstraction has 231 states and 309 transitions. [2024-11-13 15:33:56,929 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 5 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2024-11-13 15:33:56,929 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 309 transitions. [2024-11-13 15:33:56,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-13 15:33:56,930 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:33:56,930 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:33:56,931 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-13 15:33:56,931 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:33:56,931 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:33:56,931 INFO L85 PathProgramCache]: Analyzing trace with hash 1001980204, now seen corresponding path program 2 times [2024-11-13 15:33:56,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:33:56,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379982849] [2024-11-13 15:33:56,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:33:56,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:33:56,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:33:57,208 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 15:33:57,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:33:57,213 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-13 15:33:57,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:33:57,263 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-11-13 15:33:57,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:33:57,271 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-13 15:33:57,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:33:57,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379982849] [2024-11-13 15:33:57,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379982849] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:33:57,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483515954] [2024-11-13 15:33:57,271 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 15:33:57,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:33:57,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:33:57,274 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:33:57,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-13 15:33:57,344 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-13 15:33:57,344 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 15:33:57,345 INFO L255 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-13 15:33:57,347 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:33:57,461 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-13 15:33:57,461 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 15:33:57,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483515954] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:33:57,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-13 15:33:57,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 14 [2024-11-13 15:33:57,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562572587] [2024-11-13 15:33:57,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:33:57,462 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-13 15:33:57,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:33:57,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-13 15:33:57,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2024-11-13 15:33:57,463 INFO L87 Difference]: Start difference. First operand 231 states and 309 transitions. Second operand has 9 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 15:33:57,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:33:57,633 INFO L93 Difference]: Finished difference Result 313 states and 421 transitions. [2024-11-13 15:33:57,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-13 15:33:57,634 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 43 [2024-11-13 15:33:57,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:33:57,635 INFO L225 Difference]: With dead ends: 313 [2024-11-13 15:33:57,636 INFO L226 Difference]: Without dead ends: 246 [2024-11-13 15:33:57,636 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2024-11-13 15:33:57,637 INFO L432 NwaCegarLoop]: 156 mSDtfsCounter, 57 mSDsluCounter, 1000 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 1156 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 15:33:57,637 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 1156 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 15:33:57,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2024-11-13 15:33:57,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 235. [2024-11-13 15:33:57,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 198 states have (on average 1.3131313131313131) internal successors, (260), 200 states have internal predecessors, (260), 23 states have call successors, (23), 11 states have call predecessors, (23), 13 states have return successors, (30), 23 states have call predecessors, (30), 22 states have call successors, (30) [2024-11-13 15:33:57,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 313 transitions. [2024-11-13 15:33:57,657 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 313 transitions. Word has length 43 [2024-11-13 15:33:57,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:33:57,658 INFO L471 AbstractCegarLoop]: Abstraction has 235 states and 313 transitions. [2024-11-13 15:33:57,658 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 15:33:57,658 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 313 transitions. [2024-11-13 15:33:57,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-13 15:33:57,659 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:33:57,659 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:33:57,684 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-13 15:33:57,864 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-13 15:33:57,864 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:33:57,865 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:33:57,865 INFO L85 PathProgramCache]: Analyzing trace with hash -986843438, now seen corresponding path program 1 times [2024-11-13 15:33:57,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:33:57,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459246606] [2024-11-13 15:33:57,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:33:57,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:33:57,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:33:57,987 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 15:33:57,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:33:57,990 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-13 15:33:57,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:33:57,998 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-11-13 15:33:57,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:33:58,005 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-11-13 15:33:58,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:33:58,012 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-11-13 15:33:58,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:33:58,021 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-13 15:33:58,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:33:58,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459246606] [2024-11-13 15:33:58,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459246606] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:33:58,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 15:33:58,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-13 15:33:58,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669667538] [2024-11-13 15:33:58,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:33:58,022 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-13 15:33:58,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:33:58,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-13 15:33:58,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-13 15:33:58,026 INFO L87 Difference]: Start difference. First operand 235 states and 313 transitions. Second operand has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2024-11-13 15:33:58,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:33:58,078 INFO L93 Difference]: Finished difference Result 243 states and 320 transitions. [2024-11-13 15:33:58,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-13 15:33:58,079 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 46 [2024-11-13 15:33:58,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:33:58,081 INFO L225 Difference]: With dead ends: 243 [2024-11-13 15:33:58,081 INFO L226 Difference]: Without dead ends: 216 [2024-11-13 15:33:58,081 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-13 15:33:58,082 INFO L432 NwaCegarLoop]: 99 mSDtfsCounter, 3 mSDsluCounter, 388 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 487 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-13 15:33:58,082 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 487 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 15:33:58,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2024-11-13 15:33:58,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 216. [2024-11-13 15:33:58,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 183 states have (on average 1.3333333333333333) internal successors, (244), 186 states have internal predecessors, (244), 21 states have call successors, (21), 9 states have call predecessors, (21), 11 states have return successors, (27), 20 states have call predecessors, (27), 20 states have call successors, (27) [2024-11-13 15:33:58,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 292 transitions. [2024-11-13 15:33:58,105 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 292 transitions. Word has length 46 [2024-11-13 15:33:58,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:33:58,105 INFO L471 AbstractCegarLoop]: Abstraction has 216 states and 292 transitions. [2024-11-13 15:33:58,105 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2024-11-13 15:33:58,106 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 292 transitions. [2024-11-13 15:33:58,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-13 15:33:58,106 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:33:58,107 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:33:58,107 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-13 15:33:58,107 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:33:58,107 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:33:58,107 INFO L85 PathProgramCache]: Analyzing trace with hash -276239925, now seen corresponding path program 1 times [2024-11-13 15:33:58,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:33:58,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861071735] [2024-11-13 15:33:58,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:33:58,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:33:58,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:33:58,282 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 15:33:58,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:33:58,285 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-13 15:33:58,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:33:58,324 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-11-13 15:33:58,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:33:58,331 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-13 15:33:58,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:33:58,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861071735] [2024-11-13 15:33:58,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861071735] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:33:58,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401582061] [2024-11-13 15:33:58,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:33:58,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:33:58,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:33:58,333 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:33:58,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-13 15:33:58,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:33:58,408 INFO L255 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-13 15:33:58,410 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:33:58,539 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-13 15:33:58,539 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 15:33:58,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401582061] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:33:58,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-13 15:33:58,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [8] total 12 [2024-11-13 15:33:58,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575590560] [2024-11-13 15:33:58,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:33:58,542 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-13 15:33:58,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:33:58,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-13 15:33:58,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2024-11-13 15:33:58,543 INFO L87 Difference]: Start difference. First operand 216 states and 292 transitions. Second operand has 10 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-13 15:33:58,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:33:58,725 INFO L93 Difference]: Finished difference Result 379 states and 517 transitions. [2024-11-13 15:33:58,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-13 15:33:58,726 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 45 [2024-11-13 15:33:58,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:33:58,728 INFO L225 Difference]: With dead ends: 379 [2024-11-13 15:33:58,728 INFO L226 Difference]: Without dead ends: 304 [2024-11-13 15:33:58,729 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2024-11-13 15:33:58,730 INFO L432 NwaCegarLoop]: 167 mSDtfsCounter, 58 mSDsluCounter, 1227 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 1394 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 15:33:58,730 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 1394 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 15:33:58,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2024-11-13 15:33:58,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 286. [2024-11-13 15:33:58,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 244 states have (on average 1.3278688524590163) internal successors, (324), 247 states have internal predecessors, (324), 28 states have call successors, (28), 11 states have call predecessors, (28), 13 states have return successors, (36), 27 states have call predecessors, (36), 27 states have call successors, (36) [2024-11-13 15:33:58,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 388 transitions. [2024-11-13 15:33:58,769 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 388 transitions. Word has length 45 [2024-11-13 15:33:58,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:33:58,769 INFO L471 AbstractCegarLoop]: Abstraction has 286 states and 388 transitions. [2024-11-13 15:33:58,769 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-13 15:33:58,769 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 388 transitions. [2024-11-13 15:33:58,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-13 15:33:58,773 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:33:58,773 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:33:58,793 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-13 15:33:58,974 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-11-13 15:33:58,974 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:33:58,974 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:33:58,974 INFO L85 PathProgramCache]: Analyzing trace with hash -923537687, now seen corresponding path program 1 times [2024-11-13 15:33:58,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:33:58,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773101070] [2024-11-13 15:33:58,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:33:58,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:33:59,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:33:59,245 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 15:33:59,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:33:59,248 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-13 15:33:59,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:33:59,294 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-11-13 15:33:59,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:33:59,305 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-13 15:33:59,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:33:59,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773101070] [2024-11-13 15:33:59,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773101070] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:33:59,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703324539] [2024-11-13 15:33:59,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:33:59,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:33:59,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:33:59,309 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:33:59,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-13 15:33:59,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:33:59,392 INFO L255 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-13 15:33:59,394 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:33:59,704 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-13 15:33:59,704 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 15:33:59,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703324539] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:33:59,704 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-13 15:33:59,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [9] total 14 [2024-11-13 15:33:59,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912179847] [2024-11-13 15:33:59,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:33:59,705 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-13 15:33:59,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:33:59,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-13 15:33:59,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2024-11-13 15:33:59,707 INFO L87 Difference]: Start difference. First operand 286 states and 388 transitions. Second operand has 11 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-13 15:33:59,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:33:59,961 INFO L93 Difference]: Finished difference Result 375 states and 506 transitions. [2024-11-13 15:33:59,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-13 15:33:59,962 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 45 [2024-11-13 15:33:59,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:33:59,965 INFO L225 Difference]: With dead ends: 375 [2024-11-13 15:33:59,965 INFO L226 Difference]: Without dead ends: 304 [2024-11-13 15:33:59,966 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2024-11-13 15:33:59,967 INFO L432 NwaCegarLoop]: 164 mSDtfsCounter, 57 mSDsluCounter, 1052 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 1216 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-13 15:33:59,968 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 1216 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-13 15:33:59,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2024-11-13 15:34:00,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 286. [2024-11-13 15:34:00,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 244 states have (on average 1.319672131147541) internal successors, (322), 247 states have internal predecessors, (322), 28 states have call successors, (28), 11 states have call predecessors, (28), 13 states have return successors, (36), 27 states have call predecessors, (36), 27 states have call successors, (36) [2024-11-13 15:34:00,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 386 transitions. [2024-11-13 15:34:00,009 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 386 transitions. Word has length 45 [2024-11-13 15:34:00,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:34:00,009 INFO L471 AbstractCegarLoop]: Abstraction has 286 states and 386 transitions. [2024-11-13 15:34:00,010 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-13 15:34:00,010 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 386 transitions. [2024-11-13 15:34:00,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-13 15:34:00,014 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:34:00,015 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:34:00,038 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-13 15:34:00,215 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-13 15:34:00,216 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:34:00,216 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:34:00,217 INFO L85 PathProgramCache]: Analyzing trace with hash -1712839549, now seen corresponding path program 1 times [2024-11-13 15:34:00,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:34:00,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118571528] [2024-11-13 15:34:00,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:34:00,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:34:00,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:34:00,352 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 15:34:00,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:34:00,359 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-13 15:34:00,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:34:00,392 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-11-13 15:34:00,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:34:00,399 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-11-13 15:34:00,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:34:00,405 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-13 15:34:00,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:34:00,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118571528] [2024-11-13 15:34:00,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118571528] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:34:00,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845475593] [2024-11-13 15:34:00,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:34:00,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:34:00,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:34:00,409 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:34:00,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-13 15:34:00,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:34:00,494 INFO L255 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-13 15:34:00,497 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:34:00,761 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-13 15:34:00,762 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:34:01,327 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-13 15:34:01,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845475593] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-13 15:34:01,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-13 15:34:01,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [8, 15] total 26 [2024-11-13 15:34:01,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998248437] [2024-11-13 15:34:01,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:34:01,328 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-13 15:34:01,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:34:01,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-13 15:34:01,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2024-11-13 15:34:01,330 INFO L87 Difference]: Start difference. First operand 286 states and 386 transitions. Second operand has 11 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-13 15:34:01,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:34:01,626 INFO L93 Difference]: Finished difference Result 478 states and 647 transitions. [2024-11-13 15:34:01,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-13 15:34:01,627 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 47 [2024-11-13 15:34:01,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:34:01,632 INFO L225 Difference]: With dead ends: 478 [2024-11-13 15:34:01,632 INFO L226 Difference]: Without dead ends: 407 [2024-11-13 15:34:01,633 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=76, Invalid=626, Unknown=0, NotChecked=0, Total=702 [2024-11-13 15:34:01,635 INFO L432 NwaCegarLoop]: 173 mSDtfsCounter, 129 mSDsluCounter, 1332 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 1505 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-13 15:34:01,635 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 1505 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-13 15:34:01,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2024-11-13 15:34:01,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 352. [2024-11-13 15:34:01,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 301 states have (on average 1.3222591362126246) internal successors, (398), 305 states have internal predecessors, (398), 34 states have call successors, (34), 13 states have call predecessors, (34), 16 states have return successors, (43), 33 states have call predecessors, (43), 33 states have call successors, (43) [2024-11-13 15:34:01,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 475 transitions. [2024-11-13 15:34:01,678 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 475 transitions. Word has length 47 [2024-11-13 15:34:01,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:34:01,679 INFO L471 AbstractCegarLoop]: Abstraction has 352 states and 475 transitions. [2024-11-13 15:34:01,679 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-13 15:34:01,679 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 475 transitions. [2024-11-13 15:34:01,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-13 15:34:01,681 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:34:01,681 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:34:01,707 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-13 15:34:01,885 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-13 15:34:01,885 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:34:01,886 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:34:01,886 INFO L85 PathProgramCache]: Analyzing trace with hash 2041550303, now seen corresponding path program 1 times [2024-11-13 15:34:01,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:34:01,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553271452] [2024-11-13 15:34:01,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:34:01,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:34:01,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:34:02,065 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 15:34:02,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:34:02,069 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-13 15:34:02,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:34:02,073 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-11-13 15:34:02,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:34:02,108 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-11-13 15:34:02,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:34:02,114 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-13 15:34:02,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:34:02,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553271452] [2024-11-13 15:34:02,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553271452] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:34:02,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 15:34:02,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-13 15:34:02,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132508301] [2024-11-13 15:34:02,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:34:02,115 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-13 15:34:02,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:34:02,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-13 15:34:02,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2024-11-13 15:34:02,117 INFO L87 Difference]: Start difference. First operand 352 states and 475 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 7 states have internal predecessors, (33), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-13 15:34:02,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:34:02,237 INFO L93 Difference]: Finished difference Result 371 states and 495 transitions. [2024-11-13 15:34:02,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-13 15:34:02,238 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 7 states have internal predecessors, (33), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 47 [2024-11-13 15:34:02,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:34:02,241 INFO L225 Difference]: With dead ends: 371 [2024-11-13 15:34:02,241 INFO L226 Difference]: Without dead ends: 331 [2024-11-13 15:34:02,241 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-11-13 15:34:02,242 INFO L432 NwaCegarLoop]: 114 mSDtfsCounter, 11 mSDsluCounter, 758 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 872 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 15:34:02,242 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 872 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 15:34:02,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2024-11-13 15:34:02,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 325. [2024-11-13 15:34:02,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 276 states have (on average 1.3115942028985508) internal successors, (362), 280 states have internal predecessors, (362), 32 states have call successors, (32), 13 states have call predecessors, (32), 16 states have return successors, (41), 31 states have call predecessors, (41), 31 states have call successors, (41) [2024-11-13 15:34:02,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 435 transitions. [2024-11-13 15:34:02,279 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 435 transitions. Word has length 47 [2024-11-13 15:34:02,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:34:02,279 INFO L471 AbstractCegarLoop]: Abstraction has 325 states and 435 transitions. [2024-11-13 15:34:02,280 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 7 states have internal predecessors, (33), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-13 15:34:02,280 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 435 transitions. [2024-11-13 15:34:02,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-13 15:34:02,284 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:34:02,284 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:34:02,284 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-13 15:34:02,284 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:34:02,284 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:34:02,285 INFO L85 PathProgramCache]: Analyzing trace with hash 1341138283, now seen corresponding path program 1 times [2024-11-13 15:34:02,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:34:02,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878320894] [2024-11-13 15:34:02,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:34:02,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:34:02,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:34:02,313 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 15:34:02,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:34:02,316 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-13 15:34:02,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:34:02,320 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-11-13 15:34:02,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:34:02,339 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-13 15:34:02,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:34:02,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878320894] [2024-11-13 15:34:02,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878320894] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:34:02,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 15:34:02,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 15:34:02,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231962314] [2024-11-13 15:34:02,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:34:02,340 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 15:34:02,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:34:02,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 15:34:02,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 15:34:02,341 INFO L87 Difference]: Start difference. First operand 325 states and 435 transitions. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 15:34:02,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:34:02,411 INFO L93 Difference]: Finished difference Result 655 states and 883 transitions. [2024-11-13 15:34:02,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 15:34:02,412 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 46 [2024-11-13 15:34:02,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:34:02,415 INFO L225 Difference]: With dead ends: 655 [2024-11-13 15:34:02,415 INFO L226 Difference]: Without dead ends: 333 [2024-11-13 15:34:02,416 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 15:34:02,417 INFO L432 NwaCegarLoop]: 93 mSDtfsCounter, 10 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-13 15:34:02,418 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 173 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 15:34:02,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2024-11-13 15:34:02,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 328. [2024-11-13 15:34:02,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 279 states have (on average 1.3118279569892473) internal successors, (366), 283 states have internal predecessors, (366), 32 states have call successors, (32), 13 states have call predecessors, (32), 16 states have return successors, (41), 31 states have call predecessors, (41), 31 states have call successors, (41) [2024-11-13 15:34:02,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 439 transitions. [2024-11-13 15:34:02,448 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 439 transitions. Word has length 46 [2024-11-13 15:34:02,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:34:02,448 INFO L471 AbstractCegarLoop]: Abstraction has 328 states and 439 transitions. [2024-11-13 15:34:02,448 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 15:34:02,448 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 439 transitions. [2024-11-13 15:34:02,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-13 15:34:02,450 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:34:02,450 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:34:02,450 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-13 15:34:02,450 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:34:02,450 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:34:02,451 INFO L85 PathProgramCache]: Analyzing trace with hash -902405444, now seen corresponding path program 1 times [2024-11-13 15:34:02,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:34:02,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215691952] [2024-11-13 15:34:02,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:34:02,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:34:02,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:34:02,628 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 15:34:02,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:34:02,631 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-13 15:34:02,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:34:02,635 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-11-13 15:34:02,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:34:02,640 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-11-13 15:34:02,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:34:02,711 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-11-13 15:34:02,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:34:02,772 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-13 15:34:02,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:34:02,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215691952] [2024-11-13 15:34:02,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215691952] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:34:02,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141510604] [2024-11-13 15:34:02,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:34:02,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:34:02,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:34:02,775 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:34:02,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-13 15:34:02,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:34:02,855 INFO L255 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-13 15:34:02,857 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:34:03,138 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-13 15:34:03,138 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:34:03,786 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-13 15:34:03,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141510604] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:34:03,786 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 15:34:03,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17, 13] total 32 [2024-11-13 15:34:03,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917817833] [2024-11-13 15:34:03,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 15:34:03,787 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-13 15:34:03,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:34:03,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-13 15:34:03,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=904, Unknown=0, NotChecked=0, Total=992 [2024-11-13 15:34:03,789 INFO L87 Difference]: Start difference. First operand 328 states and 439 transitions. Second operand has 32 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 25 states have internal predecessors, (50), 6 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (10), 8 states have call predecessors, (10), 5 states have call successors, (10) [2024-11-13 15:34:06,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:34:06,101 INFO L93 Difference]: Finished difference Result 535 states and 742 transitions. [2024-11-13 15:34:06,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2024-11-13 15:34:06,102 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 25 states have internal predecessors, (50), 6 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (10), 8 states have call predecessors, (10), 5 states have call successors, (10) Word has length 48 [2024-11-13 15:34:06,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:34:06,105 INFO L225 Difference]: With dead ends: 535 [2024-11-13 15:34:06,105 INFO L226 Difference]: Without dead ends: 508 [2024-11-13 15:34:06,108 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 684 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=327, Invalid=3579, Unknown=0, NotChecked=0, Total=3906 [2024-11-13 15:34:06,109 INFO L432 NwaCegarLoop]: 204 mSDtfsCounter, 269 mSDsluCounter, 4040 mSDsCounter, 0 mSdLazyCounter, 1275 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 4244 SdHoareTripleChecker+Invalid, 1339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-13 15:34:06,109 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [301 Valid, 4244 Invalid, 1339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1275 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-13 15:34:06,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2024-11-13 15:34:06,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 368. [2024-11-13 15:34:06,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 308 states have (on average 1.2987012987012987) internal successors, (400), 320 states have internal predecessors, (400), 36 states have call successors, (36), 11 states have call predecessors, (36), 23 states have return successors, (60), 36 states have call predecessors, (60), 35 states have call successors, (60) [2024-11-13 15:34:06,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 496 transitions. [2024-11-13 15:34:06,153 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 496 transitions. Word has length 48 [2024-11-13 15:34:06,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:34:06,154 INFO L471 AbstractCegarLoop]: Abstraction has 368 states and 496 transitions. [2024-11-13 15:34:06,154 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 25 states have internal predecessors, (50), 6 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (10), 8 states have call predecessors, (10), 5 states have call successors, (10) [2024-11-13 15:34:06,154 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 496 transitions. [2024-11-13 15:34:06,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-13 15:34:06,155 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:34:06,156 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:34:06,180 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-13 15:34:06,360 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-13 15:34:06,360 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:34:06,361 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:34:06,361 INFO L85 PathProgramCache]: Analyzing trace with hash -1882566180, now seen corresponding path program 2 times [2024-11-13 15:34:06,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:34:06,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752334323] [2024-11-13 15:34:06,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:34:06,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:34:06,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:34:06,527 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 15:34:06,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:34:06,531 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-13 15:34:06,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:34:06,534 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-11-13 15:34:06,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:34:06,538 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-11-13 15:34:06,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:34:06,583 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-11-13 15:34:06,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:34:06,656 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-13 15:34:06,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:34:06,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752334323] [2024-11-13 15:34:06,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752334323] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:34:06,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600510793] [2024-11-13 15:34:06,657 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 15:34:06,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:34:06,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:34:06,659 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:34:06,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-13 15:34:06,751 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 15:34:06,752 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 15:34:06,753 INFO L255 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-13 15:34:06,755 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:34:07,010 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-13 15:34:07,011 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:34:07,582 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-13 15:34:07,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600510793] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:34:07,583 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 15:34:07,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17, 13] total 32 [2024-11-13 15:34:07,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198720411] [2024-11-13 15:34:07,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 15:34:07,584 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-13 15:34:07,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:34:07,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-13 15:34:07,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=904, Unknown=0, NotChecked=0, Total=992 [2024-11-13 15:34:07,586 INFO L87 Difference]: Start difference. First operand 368 states and 496 transitions. Second operand has 32 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 25 states have internal predecessors, (51), 6 states have call successors, (10), 2 states have call predecessors, (10), 6 states have return successors, (11), 9 states have call predecessors, (11), 5 states have call successors, (11) [2024-11-13 15:34:09,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:34:09,846 INFO L93 Difference]: Finished difference Result 544 states and 773 transitions. [2024-11-13 15:34:09,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-11-13 15:34:09,847 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 25 states have internal predecessors, (51), 6 states have call successors, (10), 2 states have call predecessors, (10), 6 states have return successors, (11), 9 states have call predecessors, (11), 5 states have call successors, (11) Word has length 48 [2024-11-13 15:34:09,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:34:09,852 INFO L225 Difference]: With dead ends: 544 [2024-11-13 15:34:09,853 INFO L226 Difference]: Without dead ends: 531 [2024-11-13 15:34:09,856 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 589 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=295, Invalid=3245, Unknown=0, NotChecked=0, Total=3540 [2024-11-13 15:34:09,857 INFO L432 NwaCegarLoop]: 203 mSDtfsCounter, 317 mSDsluCounter, 3681 mSDsCounter, 0 mSdLazyCounter, 1165 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 3884 SdHoareTripleChecker+Invalid, 1232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-13 15:34:09,857 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [348 Valid, 3884 Invalid, 1232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1165 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-13 15:34:09,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2024-11-13 15:34:09,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 381. [2024-11-13 15:34:09,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 316 states have (on average 1.2911392405063291) internal successors, (408), 328 states have internal predecessors, (408), 40 states have call successors, (40), 12 states have call predecessors, (40), 24 states have return successors, (73), 40 states have call predecessors, (73), 39 states have call successors, (73) [2024-11-13 15:34:09,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 521 transitions. [2024-11-13 15:34:09,908 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 521 transitions. Word has length 48 [2024-11-13 15:34:09,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:34:09,909 INFO L471 AbstractCegarLoop]: Abstraction has 381 states and 521 transitions. [2024-11-13 15:34:09,909 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 25 states have internal predecessors, (51), 6 states have call successors, (10), 2 states have call predecessors, (10), 6 states have return successors, (11), 9 states have call predecessors, (11), 5 states have call successors, (11) [2024-11-13 15:34:09,909 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 521 transitions. [2024-11-13 15:34:09,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-13 15:34:09,910 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:34:09,910 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:34:09,933 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-13 15:34:10,112 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:34:10,112 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:34:10,112 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:34:10,112 INFO L85 PathProgramCache]: Analyzing trace with hash -1943552250, now seen corresponding path program 1 times [2024-11-13 15:34:10,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:34:10,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791746463] [2024-11-13 15:34:10,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:34:10,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:34:10,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:34:10,553 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 15:34:10,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:34:10,556 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-13 15:34:10,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:34:10,564 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-11-13 15:34:10,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:34:10,614 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-13 15:34:10,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:34:10,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791746463] [2024-11-13 15:34:10,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791746463] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:34:10,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 15:34:10,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-11-13 15:34:10,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714202533] [2024-11-13 15:34:10,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:34:10,616 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-13 15:34:10,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:34:10,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-13 15:34:10,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2024-11-13 15:34:10,618 INFO L87 Difference]: Start difference. First operand 381 states and 521 transitions. Second operand has 12 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 9 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 15:34:10,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:34:10,980 INFO L93 Difference]: Finished difference Result 398 states and 546 transitions. [2024-11-13 15:34:10,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-13 15:34:10,981 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 9 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 47 [2024-11-13 15:34:10,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:34:10,983 INFO L225 Difference]: With dead ends: 398 [2024-11-13 15:34:10,984 INFO L226 Difference]: Without dead ends: 396 [2024-11-13 15:34:10,984 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2024-11-13 15:34:10,986 INFO L432 NwaCegarLoop]: 150 mSDtfsCounter, 57 mSDsluCounter, 1360 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 1510 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-13 15:34:10,987 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 1510 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-13 15:34:10,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2024-11-13 15:34:11,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 385. [2024-11-13 15:34:11,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 319 states have (on average 1.2884012539184952) internal successors, (411), 331 states have internal predecessors, (411), 40 states have call successors, (40), 13 states have call predecessors, (40), 25 states have return successors, (73), 40 states have call predecessors, (73), 39 states have call successors, (73) [2024-11-13 15:34:11,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 524 transitions. [2024-11-13 15:34:11,031 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 524 transitions. Word has length 47 [2024-11-13 15:34:11,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:34:11,031 INFO L471 AbstractCegarLoop]: Abstraction has 385 states and 524 transitions. [2024-11-13 15:34:11,032 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 9 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 15:34:11,032 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 524 transitions. [2024-11-13 15:34:11,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-13 15:34:11,037 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:34:11,037 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:34:11,037 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-13 15:34:11,037 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:34:11,038 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:34:11,038 INFO L85 PathProgramCache]: Analyzing trace with hash 640975076, now seen corresponding path program 1 times [2024-11-13 15:34:11,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:34:11,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661109158] [2024-11-13 15:34:11,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:34:11,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:34:11,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:34:11,105 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 15:34:11,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:34:11,108 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-13 15:34:11,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:34:11,137 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-11-13 15:34:11,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:34:11,144 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-11-13 15:34:11,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:34:11,150 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-11-13 15:34:11,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:34:11,196 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-13 15:34:11,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:34:11,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661109158] [2024-11-13 15:34:11,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661109158] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:34:11,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078322488] [2024-11-13 15:34:11,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:34:11,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:34:11,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:34:11,200 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:34:11,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-13 15:34:11,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:34:11,281 INFO L255 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-13 15:34:11,295 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:34:11,434 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-13 15:34:11,434 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:34:11,809 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-13 15:34:11,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078322488] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:34:11,809 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 15:34:11,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 13, 10] total 21 [2024-11-13 15:34:11,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855282691] [2024-11-13 15:34:11,810 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 15:34:11,810 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-13 15:34:11,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:34:11,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-13 15:34:11,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2024-11-13 15:34:11,812 INFO L87 Difference]: Start difference. First operand 385 states and 524 transitions. Second operand has 21 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 states have internal predecessors, (58), 5 states have call successors, (10), 2 states have call predecessors, (10), 6 states have return successors, (11), 7 states have call predecessors, (11), 4 states have call successors, (11) [2024-11-13 15:34:12,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:34:12,632 INFO L93 Difference]: Finished difference Result 536 states and 761 transitions. [2024-11-13 15:34:12,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-13 15:34:12,633 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 states have internal predecessors, (58), 5 states have call successors, (10), 2 states have call predecessors, (10), 6 states have return successors, (11), 7 states have call predecessors, (11), 4 states have call successors, (11) Word has length 50 [2024-11-13 15:34:12,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:34:12,637 INFO L225 Difference]: With dead ends: 536 [2024-11-13 15:34:12,637 INFO L226 Difference]: Without dead ends: 506 [2024-11-13 15:34:12,638 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=122, Invalid=808, Unknown=0, NotChecked=0, Total=930 [2024-11-13 15:34:12,639 INFO L432 NwaCegarLoop]: 152 mSDtfsCounter, 172 mSDsluCounter, 1932 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 2084 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-13 15:34:12,639 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [181 Valid, 2084 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 437 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-13 15:34:12,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2024-11-13 15:34:12,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 396. [2024-11-13 15:34:12,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 325 states have (on average 1.28) internal successors, (416), 341 states have internal predecessors, (416), 42 states have call successors, (42), 12 states have call predecessors, (42), 28 states have return successors, (91), 42 states have call predecessors, (91), 41 states have call successors, (91) [2024-11-13 15:34:12,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 549 transitions. [2024-11-13 15:34:12,697 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 549 transitions. Word has length 50 [2024-11-13 15:34:12,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:34:12,697 INFO L471 AbstractCegarLoop]: Abstraction has 396 states and 549 transitions. [2024-11-13 15:34:12,697 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 states have internal predecessors, (58), 5 states have call successors, (10), 2 states have call predecessors, (10), 6 states have return successors, (11), 7 states have call predecessors, (11), 4 states have call successors, (11) [2024-11-13 15:34:12,698 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 549 transitions. [2024-11-13 15:34:12,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-13 15:34:12,700 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:34:12,700 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:34:12,725 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-13 15:34:12,904 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-13 15:34:12,904 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:34:12,904 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:34:12,904 INFO L85 PathProgramCache]: Analyzing trace with hash -692579255, now seen corresponding path program 1 times [2024-11-13 15:34:12,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:34:12,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382799899] [2024-11-13 15:34:12,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:34:12,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:34:12,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:34:12,933 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 15:34:12,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:34:12,938 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-13 15:34:12,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:34:12,941 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-11-13 15:34:12,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:34:12,963 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-11-13 15:34:12,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:34:12,968 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-11-13 15:34:12,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:34:12,973 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-13 15:34:12,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:34:12,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382799899] [2024-11-13 15:34:12,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382799899] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:34:12,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 15:34:12,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 15:34:12,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760059687] [2024-11-13 15:34:12,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:34:12,975 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 15:34:12,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:34:12,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 15:34:12,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 15:34:12,976 INFO L87 Difference]: Start difference. First operand 396 states and 549 transitions. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-13 15:34:13,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:34:13,054 INFO L93 Difference]: Finished difference Result 795 states and 1106 transitions. [2024-11-13 15:34:13,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 15:34:13,054 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 54 [2024-11-13 15:34:13,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:34:13,058 INFO L225 Difference]: With dead ends: 795 [2024-11-13 15:34:13,058 INFO L226 Difference]: Without dead ends: 402 [2024-11-13 15:34:13,060 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 15:34:13,064 INFO L432 NwaCegarLoop]: 101 mSDtfsCounter, 5 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-13 15:34:13,064 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 182 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 15:34:13,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2024-11-13 15:34:13,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 398. [2024-11-13 15:34:13,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 327 states have (on average 1.2782874617737003) internal successors, (418), 343 states have internal predecessors, (418), 42 states have call successors, (42), 12 states have call predecessors, (42), 28 states have return successors, (91), 42 states have call predecessors, (91), 41 states have call successors, (91) [2024-11-13 15:34:13,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 551 transitions. [2024-11-13 15:34:13,108 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 551 transitions. Word has length 54 [2024-11-13 15:34:13,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:34:13,108 INFO L471 AbstractCegarLoop]: Abstraction has 398 states and 551 transitions. [2024-11-13 15:34:13,108 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-13 15:34:13,108 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 551 transitions. [2024-11-13 15:34:13,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-13 15:34:13,111 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:34:13,111 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:34:13,111 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-11-13 15:34:13,111 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:34:13,112 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:34:13,112 INFO L85 PathProgramCache]: Analyzing trace with hash -1466627258, now seen corresponding path program 1 times [2024-11-13 15:34:13,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:34:13,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3822520] [2024-11-13 15:34:13,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:34:13,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:34:13,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:34:13,206 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 15:34:13,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:34:13,210 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-13 15:34:13,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:34:13,238 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-11-13 15:34:13,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:34:13,249 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-11-13 15:34:13,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:34:13,257 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-11-13 15:34:13,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:34:13,299 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-13 15:34:13,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:34:13,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3822520] [2024-11-13 15:34:13,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3822520] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:34:13,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325321037] [2024-11-13 15:34:13,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:34:13,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:34:13,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:34:13,303 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:34:13,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-13 15:34:13,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:34:13,392 INFO L255 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-13 15:34:13,394 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:34:13,473 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-13 15:34:13,473 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:34:13,685 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-13 15:34:13,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325321037] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:34:13,685 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 15:34:13,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2024-11-13 15:34:13,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142171944] [2024-11-13 15:34:13,686 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 15:34:13,686 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-13 15:34:13,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:34:13,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-13 15:34:13,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2024-11-13 15:34:13,688 INFO L87 Difference]: Start difference. First operand 398 states and 551 transitions. Second operand has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 12 states have internal predecessors, (52), 4 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (10), 6 states have call predecessors, (10), 3 states have call successors, (10) [2024-11-13 15:34:13,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:34:13,844 INFO L93 Difference]: Finished difference Result 419 states and 573 transitions. [2024-11-13 15:34:13,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-13 15:34:13,845 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 12 states have internal predecessors, (52), 4 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (10), 6 states have call predecessors, (10), 3 states have call successors, (10) Word has length 55 [2024-11-13 15:34:13,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:34:13,848 INFO L225 Difference]: With dead ends: 419 [2024-11-13 15:34:13,848 INFO L226 Difference]: Without dead ends: 395 [2024-11-13 15:34:13,849 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 112 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2024-11-13 15:34:13,849 INFO L432 NwaCegarLoop]: 102 mSDtfsCounter, 88 mSDsluCounter, 709 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 811 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 15:34:13,850 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 811 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 15:34:13,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2024-11-13 15:34:13,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 387. [2024-11-13 15:34:13,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 318 states have (on average 1.270440251572327) internal successors, (404), 333 states have internal predecessors, (404), 42 states have call successors, (42), 12 states have call predecessors, (42), 26 states have return successors, (86), 41 states have call predecessors, (86), 39 states have call successors, (86) [2024-11-13 15:34:13,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 532 transitions. [2024-11-13 15:34:13,886 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 532 transitions. Word has length 55 [2024-11-13 15:34:13,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:34:13,886 INFO L471 AbstractCegarLoop]: Abstraction has 387 states and 532 transitions. [2024-11-13 15:34:13,887 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 12 states have internal predecessors, (52), 4 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (10), 6 states have call predecessors, (10), 3 states have call successors, (10) [2024-11-13 15:34:13,887 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 532 transitions. [2024-11-13 15:34:13,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-13 15:34:13,888 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:34:13,889 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:34:13,912 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-13 15:34:14,093 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:34:14,093 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:34:14,095 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:34:14,096 INFO L85 PathProgramCache]: Analyzing trace with hash -2053433272, now seen corresponding path program 1 times [2024-11-13 15:34:14,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:34:14,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95307629] [2024-11-13 15:34:14,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:34:14,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:34:14,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:34:14,302 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 15:34:14,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:34:14,305 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-13 15:34:14,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:34:14,309 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-11-13 15:34:14,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:34:14,316 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-11-13 15:34:14,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:34:14,372 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-11-13 15:34:14,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:34:14,422 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-13 15:34:14,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:34:14,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95307629] [2024-11-13 15:34:14,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95307629] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:34:14,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744361637] [2024-11-13 15:34:14,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:34:14,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:34:14,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:34:14,427 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:34:14,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-13 15:34:14,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:34:14,654 INFO L255 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-13 15:34:14,656 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:34:14,707 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-13 15:34:14,707 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:34:15,178 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-13 15:34:15,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744361637] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:34:15,179 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 15:34:15,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2024-11-13 15:34:15,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804085555] [2024-11-13 15:34:15,179 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 15:34:15,180 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-13 15:34:15,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:34:15,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-13 15:34:15,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=540, Unknown=0, NotChecked=0, Total=600 [2024-11-13 15:34:15,181 INFO L87 Difference]: Start difference. First operand 387 states and 532 transitions. Second operand has 25 states, 23 states have (on average 2.347826086956522) internal successors, (54), 21 states have internal predecessors, (54), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-13 15:34:16,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:34:16,185 INFO L93 Difference]: Finished difference Result 441 states and 627 transitions. [2024-11-13 15:34:16,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-13 15:34:16,186 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.347826086956522) internal successors, (54), 21 states have internal predecessors, (54), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 55 [2024-11-13 15:34:16,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:34:16,189 INFO L225 Difference]: With dead ends: 441 [2024-11-13 15:34:16,190 INFO L226 Difference]: Without dead ends: 423 [2024-11-13 15:34:16,191 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=137, Invalid=1269, Unknown=0, NotChecked=0, Total=1406 [2024-11-13 15:34:16,191 INFO L432 NwaCegarLoop]: 130 mSDtfsCounter, 169 mSDsluCounter, 2358 mSDsCounter, 0 mSdLazyCounter, 713 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 2488 SdHoareTripleChecker+Invalid, 727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 713 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-13 15:34:16,192 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 2488 Invalid, 727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 713 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-13 15:34:16,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2024-11-13 15:34:16,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 383. [2024-11-13 15:34:16,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 315 states have (on average 1.2698412698412698) internal successors, (400), 327 states have internal predecessors, (400), 43 states have call successors, (43), 12 states have call predecessors, (43), 24 states have return successors, (87), 43 states have call predecessors, (87), 40 states have call successors, (87) [2024-11-13 15:34:16,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 530 transitions. [2024-11-13 15:34:16,233 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 530 transitions. Word has length 55 [2024-11-13 15:34:16,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:34:16,234 INFO L471 AbstractCegarLoop]: Abstraction has 383 states and 530 transitions. [2024-11-13 15:34:16,234 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.347826086956522) internal successors, (54), 21 states have internal predecessors, (54), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-13 15:34:16,234 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 530 transitions. [2024-11-13 15:34:16,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-13 15:34:16,236 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:34:16,236 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:34:16,260 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-13 15:34:16,440 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:34:16,440 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:34:16,440 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:34:16,440 INFO L85 PathProgramCache]: Analyzing trace with hash -480524566, now seen corresponding path program 2 times [2024-11-13 15:34:16,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:34:16,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663487672] [2024-11-13 15:34:16,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:34:16,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:34:16,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:34:16,582 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 15:34:16,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:34:16,585 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-13 15:34:16,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:34:16,591 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-11-13 15:34:16,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:34:16,594 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-11-13 15:34:16,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:34:16,634 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-11-13 15:34:16,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:34:16,702 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-13 15:34:16,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:34:16,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663487672] [2024-11-13 15:34:16,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663487672] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:34:16,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919694577] [2024-11-13 15:34:16,703 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 15:34:16,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:34:16,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:34:16,705 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:34:16,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-13 15:34:16,803 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 15:34:16,803 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 15:34:16,808 INFO L255 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-11-13 15:34:16,810 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:34:18,042 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-13 15:34:18,042 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:34:19,043 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-13 15:34:19,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919694577] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:34:19,043 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 15:34:19,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 18, 13] total 36 [2024-11-13 15:34:19,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455086934] [2024-11-13 15:34:19,044 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 15:34:19,044 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-11-13 15:34:19,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:34:19,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-11-13 15:34:19,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=1167, Unknown=0, NotChecked=0, Total=1260 [2024-11-13 15:34:19,046 INFO L87 Difference]: Start difference. First operand 383 states and 530 transitions. Second operand has 36 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 29 states have internal predecessors, (65), 6 states have call successors, (10), 2 states have call predecessors, (10), 7 states have return successors, (11), 9 states have call predecessors, (11), 5 states have call successors, (11) [2024-11-13 15:34:21,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:34:21,052 INFO L93 Difference]: Finished difference Result 497 states and 753 transitions. [2024-11-13 15:34:21,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-11-13 15:34:21,053 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 29 states have internal predecessors, (65), 6 states have call successors, (10), 2 states have call predecessors, (10), 7 states have return successors, (11), 9 states have call predecessors, (11), 5 states have call successors, (11) Word has length 55 [2024-11-13 15:34:21,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:34:21,056 INFO L225 Difference]: With dead ends: 497 [2024-11-13 15:34:21,056 INFO L226 Difference]: Without dead ends: 457 [2024-11-13 15:34:21,058 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=185, Invalid=2167, Unknown=0, NotChecked=0, Total=2352 [2024-11-13 15:34:21,058 INFO L432 NwaCegarLoop]: 135 mSDtfsCounter, 132 mSDsluCounter, 3316 mSDsCounter, 0 mSdLazyCounter, 1285 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 3451 SdHoareTripleChecker+Invalid, 1296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-11-13 15:34:21,058 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 3451 Invalid, 1296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1285 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-11-13 15:34:21,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2024-11-13 15:34:21,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 375. [2024-11-13 15:34:21,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 308 states have (on average 1.275974025974026) internal successors, (393), 322 states have internal predecessors, (393), 42 states have call successors, (42), 10 states have call predecessors, (42), 24 states have return successors, (86), 42 states have call predecessors, (86), 39 states have call successors, (86) [2024-11-13 15:34:21,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 521 transitions. [2024-11-13 15:34:21,102 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 521 transitions. Word has length 55 [2024-11-13 15:34:21,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:34:21,103 INFO L471 AbstractCegarLoop]: Abstraction has 375 states and 521 transitions. [2024-11-13 15:34:21,103 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 29 states have internal predecessors, (65), 6 states have call successors, (10), 2 states have call predecessors, (10), 7 states have return successors, (11), 9 states have call predecessors, (11), 5 states have call successors, (11) [2024-11-13 15:34:21,103 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 521 transitions. [2024-11-13 15:34:21,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-11-13 15:34:21,104 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:34:21,105 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:34:21,125 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-13 15:34:21,309 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:34:21,309 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:34:21,310 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:34:21,310 INFO L85 PathProgramCache]: Analyzing trace with hash -2142301930, now seen corresponding path program 1 times [2024-11-13 15:34:21,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:34:21,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936231407] [2024-11-13 15:34:21,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:34:21,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:34:21,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:34:21,422 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 15:34:21,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:34:21,426 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-13 15:34:21,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:34:21,429 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-11-13 15:34:21,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:34:21,437 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-11-13 15:34:21,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:34:21,443 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-13 15:34:21,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:34:21,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936231407] [2024-11-13 15:34:21,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936231407] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:34:21,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 15:34:21,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-13 15:34:21,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92147540] [2024-11-13 15:34:21,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:34:21,444 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 15:34:21,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:34:21,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 15:34:21,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-13 15:34:21,445 INFO L87 Difference]: Start difference. First operand 375 states and 521 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-13 15:34:21,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:34:21,556 INFO L93 Difference]: Finished difference Result 426 states and 600 transitions. [2024-11-13 15:34:21,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 15:34:21,557 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 59 [2024-11-13 15:34:21,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:34:21,560 INFO L225 Difference]: With dead ends: 426 [2024-11-13 15:34:21,560 INFO L226 Difference]: Without dead ends: 421 [2024-11-13 15:34:21,560 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-13 15:34:21,566 INFO L432 NwaCegarLoop]: 96 mSDtfsCounter, 11 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 15:34:21,567 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 364 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 15:34:21,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2024-11-13 15:34:21,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 397. [2024-11-13 15:34:21,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 323 states have (on average 1.2972136222910218) internal successors, (419), 343 states have internal predecessors, (419), 48 states have call successors, (48), 11 states have call predecessors, (48), 25 states have return successors, (92), 42 states have call predecessors, (92), 45 states have call successors, (92) [2024-11-13 15:34:21,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 559 transitions. [2024-11-13 15:34:21,615 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 559 transitions. Word has length 59 [2024-11-13 15:34:21,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:34:21,615 INFO L471 AbstractCegarLoop]: Abstraction has 397 states and 559 transitions. [2024-11-13 15:34:21,615 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-13 15:34:21,615 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 559 transitions. [2024-11-13 15:34:21,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-11-13 15:34:21,617 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:34:21,617 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:34:21,618 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-11-13 15:34:21,619 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:34:21,619 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:34:21,619 INFO L85 PathProgramCache]: Analyzing trace with hash -653467535, now seen corresponding path program 1 times [2024-11-13 15:34:21,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:34:21,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805641844] [2024-11-13 15:34:21,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:34:21,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:34:21,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:34:21,729 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 15:34:21,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:34:21,732 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-13 15:34:21,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:34:21,736 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-11-13 15:34:21,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:34:21,740 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-11-13 15:34:21,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:34:21,744 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-13 15:34:21,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:34:21,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805641844] [2024-11-13 15:34:21,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805641844] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:34:21,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 15:34:21,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 15:34:21,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236243924] [2024-11-13 15:34:21,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:34:21,746 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 15:34:21,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:34:21,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 15:34:21,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 15:34:21,747 INFO L87 Difference]: Start difference. First operand 397 states and 559 transitions. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-13 15:34:21,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:34:21,830 INFO L93 Difference]: Finished difference Result 600 states and 850 transitions. [2024-11-13 15:34:21,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 15:34:21,830 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 60 [2024-11-13 15:34:21,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:34:21,833 INFO L225 Difference]: With dead ends: 600 [2024-11-13 15:34:21,834 INFO L226 Difference]: Without dead ends: 404 [2024-11-13 15:34:21,835 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 15:34:21,836 INFO L432 NwaCegarLoop]: 101 mSDtfsCounter, 0 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-13 15:34:21,836 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 182 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 15:34:21,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2024-11-13 15:34:21,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 404. [2024-11-13 15:34:21,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 330 states have (on average 1.290909090909091) internal successors, (426), 350 states have internal predecessors, (426), 48 states have call successors, (48), 11 states have call predecessors, (48), 25 states have return successors, (92), 42 states have call predecessors, (92), 45 states have call successors, (92) [2024-11-13 15:34:21,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 566 transitions. [2024-11-13 15:34:21,881 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 566 transitions. Word has length 60 [2024-11-13 15:34:21,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:34:21,882 INFO L471 AbstractCegarLoop]: Abstraction has 404 states and 566 transitions. [2024-11-13 15:34:21,882 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-13 15:34:21,882 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 566 transitions. [2024-11-13 15:34:21,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-11-13 15:34:21,884 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:34:21,884 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:34:21,884 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-11-13 15:34:21,885 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:34:21,885 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:34:21,885 INFO L85 PathProgramCache]: Analyzing trace with hash 974275403, now seen corresponding path program 1 times [2024-11-13 15:34:21,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:34:21,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475093272] [2024-11-13 15:34:21,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:34:21,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:34:21,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:34:22,050 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 15:34:22,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:34:22,053 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-13 15:34:22,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:34:22,057 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-11-13 15:34:22,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:34:22,061 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-11-13 15:34:22,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:34:22,064 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-13 15:34:22,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:34:22,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475093272] [2024-11-13 15:34:22,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475093272] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:34:22,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 15:34:22,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-13 15:34:22,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183266278] [2024-11-13 15:34:22,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:34:22,066 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-13 15:34:22,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:34:22,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-13 15:34:22,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-13 15:34:22,066 INFO L87 Difference]: Start difference. First operand 404 states and 566 transitions. Second operand has 6 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-13 15:34:22,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:34:22,206 INFO L93 Difference]: Finished difference Result 448 states and 631 transitions. [2024-11-13 15:34:22,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-13 15:34:22,207 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 61 [2024-11-13 15:34:22,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:34:22,212 INFO L225 Difference]: With dead ends: 448 [2024-11-13 15:34:22,212 INFO L226 Difference]: Without dead ends: 443 [2024-11-13 15:34:22,212 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-13 15:34:22,214 INFO L432 NwaCegarLoop]: 102 mSDtfsCounter, 10 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 15:34:22,214 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 473 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 15:34:22,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2024-11-13 15:34:22,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 403. [2024-11-13 15:34:22,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 329 states have (on average 1.2887537993920972) internal successors, (424), 349 states have internal predecessors, (424), 48 states have call successors, (48), 11 states have call predecessors, (48), 25 states have return successors, (92), 42 states have call predecessors, (92), 45 states have call successors, (92) [2024-11-13 15:34:22,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 564 transitions. [2024-11-13 15:34:22,264 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 564 transitions. Word has length 61 [2024-11-13 15:34:22,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:34:22,264 INFO L471 AbstractCegarLoop]: Abstraction has 403 states and 564 transitions. [2024-11-13 15:34:22,265 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-13 15:34:22,265 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 564 transitions. [2024-11-13 15:34:22,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-11-13 15:34:22,266 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:34:22,266 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:34:22,266 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-11-13 15:34:22,267 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:34:22,267 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:34:22,267 INFO L85 PathProgramCache]: Analyzing trace with hash -1658354093, now seen corresponding path program 1 times [2024-11-13 15:34:22,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:34:22,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574908932] [2024-11-13 15:34:22,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:34:22,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:34:22,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-13 15:34:22,315 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-13 15:34:22,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-13 15:34:22,395 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-13 15:34:22,395 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-13 15:34:22,396 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-11-13 15:34:22,399 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-11-13 15:34:22,403 INFO L407 BasicCegarLoop]: Path program histogram: [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:34:22,460 INFO L173 ceAbstractionStarter]: Computing trace abstraction results [2024-11-13 15:34:22,466 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.11 03:34:22 BoogieIcfgContainer [2024-11-13 15:34:22,466 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-11-13 15:34:22,467 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-11-13 15:34:22,467 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-11-13 15:34:22,468 INFO L274 PluginConnector]: Witness Printer initialized [2024-11-13 15:34:22,469 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 03:33:49" (3/4) ... [2024-11-13 15:34:22,471 INFO L145 WitnessPrinter]: No result that supports witness generation found [2024-11-13 15:34:22,473 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-11-13 15:34:22,474 INFO L158 Benchmark]: Toolchain (without parser) took 34129.36ms. Allocated memory was 117.4MB in the beginning and 218.1MB in the end (delta: 100.7MB). Free memory was 92.2MB in the beginning and 84.5MB in the end (delta: 7.7MB). Peak memory consumption was 108.1MB. Max. memory is 16.1GB. [2024-11-13 15:34:22,475 INFO L158 Benchmark]: CDTParser took 1.07ms. Allocated memory is still 117.4MB. Free memory is still 74.4MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-13 15:34:22,476 INFO L158 Benchmark]: CACSL2BoogieTranslator took 428.73ms. Allocated memory is still 117.4MB. Free memory was 91.9MB in the beginning and 78.6MB in the end (delta: 13.3MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2024-11-13 15:34:22,476 INFO L158 Benchmark]: Boogie Procedure Inliner took 33.40ms. Allocated memory is still 117.4MB. Free memory was 78.3MB in the beginning and 77.2MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-13 15:34:22,476 INFO L158 Benchmark]: Boogie Preprocessor took 84.59ms. Allocated memory is still 117.4MB. Free memory was 77.2MB in the beginning and 75.5MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-13 15:34:22,476 INFO L158 Benchmark]: RCFGBuilder took 708.94ms. Allocated memory is still 117.4MB. Free memory was 75.5MB in the beginning and 57.1MB in the end (delta: 18.4MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2024-11-13 15:34:22,477 INFO L158 Benchmark]: TraceAbstraction took 32859.18ms. Allocated memory was 117.4MB in the beginning and 218.1MB in the end (delta: 100.7MB). Free memory was 56.5MB in the beginning and 86.8MB in the end (delta: -30.3MB). Peak memory consumption was 74.5MB. Max. memory is 16.1GB. [2024-11-13 15:34:22,477 INFO L158 Benchmark]: Witness Printer took 5.80ms. Allocated memory is still 218.1MB. Free memory was 86.8MB in the beginning and 84.5MB in the end (delta: 2.4MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-13 15:34:22,482 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.07ms. Allocated memory is still 117.4MB. Free memory is still 74.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 428.73ms. Allocated memory is still 117.4MB. Free memory was 91.9MB in the beginning and 78.6MB in the end (delta: 13.3MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 33.40ms. Allocated memory is still 117.4MB. Free memory was 78.3MB in the beginning and 77.2MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 84.59ms. Allocated memory is still 117.4MB. Free memory was 77.2MB in the beginning and 75.5MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 708.94ms. Allocated memory is still 117.4MB. Free memory was 75.5MB in the beginning and 57.1MB in the end (delta: 18.4MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 32859.18ms. Allocated memory was 117.4MB in the beginning and 218.1MB in the end (delta: 100.7MB). Free memory was 56.5MB in the beginning and 86.8MB in the end (delta: -30.3MB). Peak memory consumption was 74.5MB. Max. memory is 16.1GB. * Witness Printer took 5.80ms. Allocated memory is still 218.1MB. Free memory was 86.8MB in the beginning and 84.5MB in the end (delta: 2.4MB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 18]: Unable to prove that a call to reach_error is unreachable Unable to prove that a call to reach_error is unreachable Reason: overapproximation of bitwiseOr at line 114, overapproximation of bitwiseOr at line 111, overapproximation of bitwiseAnd at line 127. Possible FailurePath: [L227] unsigned int a ; [L228] unsigned int ma = __VERIFIER_nondet_uint(); [L229] signed char ea = __VERIFIER_nondet_char(); [L230] unsigned int b ; [L231] unsigned int mb = __VERIFIER_nondet_uint(); [L232] signed char eb = __VERIFIER_nondet_char(); [L233] unsigned int r_add1 ; [L234] unsigned int r_add2 ; [L235] unsigned int zero ; [L236] int tmp ; [L237] int tmp___0 ; [L238] int __retres14 ; VAL [ea=127, eb=127] [L242] CALL, EXPR base2flt(0, 0) VAL [\old(e)=0, \old(m)=0] [L26] unsigned int res ; [L27] unsigned int __retres4 ; VAL [\old(e)=0, \old(m)=0, e=0, m=0] [L30] COND TRUE ! m [L31] __retres4 = 0U VAL [\old(e)=0, \old(m)=0, __retres4=0, e=0] [L81] return (__retres4); VAL [\old(e)=0, \old(m)=0, \result=0, e=0] [L242] RET, EXPR base2flt(0, 0) VAL [ea=127, eb=127] [L242] zero = base2flt(0, 0) [L243] CALL, EXPR base2flt(ma, ea) VAL [\old(e)=127, \old(m)=4328521728] [L26] unsigned int res ; [L27] unsigned int __retres4 ; VAL [\old(e)=127, \old(m)=4328521728, e=127, m=4328521728] [L30] COND FALSE !(! m) VAL [\old(e)=127, \old(m)=4328521728, e=127, m=4328521728] [L36] COND FALSE !(m < 1U << 24U) VAL [\old(e)=127, \old(m)=4328521728, e=127, m=4328521728] [L58] COND TRUE 1 VAL [\old(e)=127, \old(m)=4328521728, e=127, m=4328521728] [L60] COND TRUE m >= 1U << 25U VAL [\old(e)=127, \old(m)=4328521728, e=127, m=4328521728] [L65] COND TRUE e >= 127 [L66] __retres4 = 4294967295U VAL [\old(e)=127, \old(m)=4328521728, __retres4=4294967295, m=4328521728] [L81] return (__retres4); VAL [\old(e)=127, \old(m)=4328521728, \result=4294967295, m=4328521728] [L243] RET, EXPR base2flt(ma, ea) VAL [ea=127, eb=127, ma=4328521728] [L243] a = base2flt(ma, ea) [L244] CALL, EXPR base2flt(mb, eb) VAL [\old(e)=127, \old(m)=33554432] [L26] unsigned int res ; [L27] unsigned int __retres4 ; VAL [\old(e)=127, \old(m)=33554432, e=127, m=33554432] [L30] COND FALSE !(! m) VAL [\old(e)=127, \old(m)=33554432, e=127, m=33554432] [L36] COND FALSE !(m < 1U << 24U) VAL [\old(e)=127, \old(m)=33554432, e=127, m=33554432] [L58] COND TRUE 1 VAL [\old(e)=127, \old(m)=33554432, e=127, m=33554432] [L60] COND TRUE m >= 1U << 25U VAL [\old(e)=127, \old(m)=33554432, e=127, m=33554432] [L65] COND TRUE e >= 127 [L66] __retres4 = 4294967295U VAL [\old(e)=127, \old(m)=33554432, __retres4=4294967295, m=33554432] [L81] return (__retres4); VAL [\old(e)=127, \old(m)=33554432, \result=4294967295, m=33554432] [L244] RET, EXPR base2flt(mb, eb) VAL [a=4294967295, ea=127, eb=127, ma=4328521728, mb=33554432] [L244] b = base2flt(mb, eb) [L245] CALL addflt(a, b) VAL [\old(a)=4294967295, \old(b)=4294967295] [L85] unsigned int res ; [L86] unsigned int ma ; [L87] unsigned int mb ; [L88] unsigned int delta ; [L89] int ea ; [L90] int eb ; [L91] unsigned int tmp ; [L92] unsigned int __retres10 ; VAL [\old(a)=4294967295, \old(b)=4294967295, a=4294967295, b=4294967295] [L95] COND FALSE !(a < b) VAL [\old(a)=4294967295, \old(b)=4294967295, a=4294967295, b=4294967295] [L102] COND FALSE !(! b) [L109] ma = a & ((1U << 24U) - 1U) [L110] ea = (int )(a >> 24U) - 128 VAL [\old(a)=4294967295, \old(b)=4294967295, a=4294967295, b=4294967295, ea=127, ma=16777215] [L111] EXPR ma | (1U << 24U) VAL [\old(a)=4294967295, \old(b)=4294967295, a=4294967295, b=4294967295, ea=127] [L111] ma = ma | (1U << 24U) [L112] mb = b & ((1U << 24U) - 1U) [L113] eb = (int )(b >> 24U) - 128 VAL [\old(a)=4294967295, \old(b)=4294967295, a=4294967295, ea=127, eb=127, ma=16777217, mb=16777215] [L114] EXPR mb | (1U << 24U) VAL [\old(a)=4294967295, \old(b)=4294967295, a=4294967295, ea=127, eb=127, ma=16777217] [L114] mb = mb | (1U << 24U) [L115] CALL __VERIFIER_assert(ea >= eb) VAL [\old(cond)=1] [L17] COND FALSE !(!(cond)) VAL [\old(cond)=1] [L115] RET __VERIFIER_assert(ea >= eb) VAL [\old(a)=4294967295, \old(b)=4294967295, a=4294967295, ea=127, eb=127, ma=16777217, mb=-4278190080] [L116] delta = ea - eb VAL [\old(a)=4294967295, \old(b)=4294967295, a=4294967295, delta=0, ea=127, ma=16777217, mb=-4278190080] [L117] COND FALSE !(!(delta < sizeof(mb) * 8)) VAL [\old(a)=4294967295, \old(b)=4294967295, a=4294967295, delta=0, ea=127, ma=16777217, mb=-4278190080] [L118] EXPR mb >> delta VAL [\old(a)=4294967295, \old(b)=4294967295, a=4294967295, ea=127, ma=16777217] [L118] mb = mb >> delta [L120] COND FALSE !(! mb) [L126] ma = ma + mb VAL [\old(a)=4294967295, \old(b)=4294967295, a=4294967295, ea=127, ma=-4261412863] [L127] ma & (1U << 25U) VAL [\old(a)=4294967295, \old(b)=4294967295, a=4294967295, ea=127, ma=-4261412863] [L127] COND FALSE !(ma & (1U << 25U)) [L140] CALL __VERIFIER_assert(ma < 1U << 25U) VAL [\old(cond)=0] [L17] COND TRUE !(cond) VAL [\old(cond)=0] [L18] reach_error() VAL [\old(cond)=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 78 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 32.7s, OverallIterations: 25, TraceHistogramMax: 3, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.1s, AutomataDifference: 12.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2136 SdHoareTripleChecker+Valid, 7.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1966 mSDsluCounter, 33032 SdHoareTripleChecker+Invalid, 6.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 29883 mSDsCounter, 229 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 6898 IncrementalHoareTripleChecker+Invalid, 7127 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 229 mSolverCounterUnsat, 3149 mSDtfsCounter, 6898 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1528 GetRequests, 1083 SyntacticMatches, 2 SemanticMatches, 443 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2178 ImplicationChecksByTransitivity, 10.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=404occurred in iteration=23, InterpolantAutomatonStates: 341, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.9s AutomataMinimizationTime, 24 MinimizatonAttempts, 955 StatesRemovedByMinimization, 22 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 1.1s SatisfiabilityAnalysisTime, 14.1s InterpolantComputationTime, 1820 NumberOfCodeBlocks, 1802 NumberOfCodeBlocksAsserted, 40 NumberOfCheckSat, 2111 ConstructedInterpolants, 0 QuantifiedInterpolants, 5009 SizeOfPredicates, 21 NumberOfNonLiveVariables, 1889 ConjunctsInSsa, 333 ConjunctsInUnsatCore, 45 InterpolantComputations, 17 PerfectInterpolantSequences, 749/871 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2024-11-13 15:34:22,523 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/config/AutomizerReach.xml -i ../../sv-benchmarks/c/bitvector/soft_float_4-2a.c.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd --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 2abfa4882ab8ec6bd7a33a5fbeaa8a88ba40a897019218fc162e52833c89454b --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-13 15:34:25,537 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-13 15:34:25,662 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2024-11-13 15:34:25,669 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-13 15:34:25,669 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-13 15:34:25,696 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-13 15:34:25,697 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-13 15:34:25,697 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-13 15:34:25,697 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-13 15:34:25,698 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-13 15:34:25,698 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-13 15:34:25,698 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-13 15:34:25,698 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-13 15:34:25,699 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-13 15:34:25,699 INFO L153 SettingsManager]: * Use SBE=true [2024-11-13 15:34:25,699 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-13 15:34:25,699 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-13 15:34:25,699 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-13 15:34:25,700 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-13 15:34:25,700 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-13 15:34:25,700 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-13 15:34:25,700 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-13 15:34:25,700 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-13 15:34:25,701 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-13 15:34:25,701 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-11-13 15:34:25,701 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-13 15:34:25,701 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-11-13 15:34:25,701 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-13 15:34:25,702 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-13 15:34:25,702 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-13 15:34:25,702 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-13 15:34:25,702 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-13 15:34:25,702 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-13 15:34:25,702 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-13 15:34:25,703 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-13 15:34:25,703 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-13 15:34:25,703 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-13 15:34:25,703 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-13 15:34:25,703 INFO L153 SettingsManager]: * Trace refinement strategy=FOX [2024-11-13 15:34:25,704 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-11-13 15:34:25,704 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-13 15:34:25,704 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-13 15:34:25,704 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-13 15:34:25,704 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-13 15:34:25,704 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_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd 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 -> 2abfa4882ab8ec6bd7a33a5fbeaa8a88ba40a897019218fc162e52833c89454b [2024-11-13 15:34:26,119 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-13 15:34:26,129 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-13 15:34:26,131 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-13 15:34:26,133 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-13 15:34:26,133 INFO L274 PluginConnector]: CDTParser initialized [2024-11-13 15:34:26,135 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/../../sv-benchmarks/c/bitvector/soft_float_4-2a.c.cil.c Unable to find full path for "g++" [2024-11-13 15:34:28,420 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-13 15:34:28,731 INFO L384 CDTParser]: Found 1 translation units. [2024-11-13 15:34:28,735 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/sv-benchmarks/c/bitvector/soft_float_4-2a.c.cil.c [2024-11-13 15:34:28,749 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/data/5b78f53e2/21f5c7c841914a5493731b5b2a866226/FLAG0818cf081 [2024-11-13 15:34:28,775 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/data/5b78f53e2/21f5c7c841914a5493731b5b2a866226 [2024-11-13 15:34:28,779 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-13 15:34:28,783 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-13 15:34:28,785 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-13 15:34:28,786 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-13 15:34:28,792 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-13 15:34:28,793 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 03:34:28" (1/1) ... [2024-11-13 15:34:28,794 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@547ca615 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:34:28, skipping insertion in model container [2024-11-13 15:34:28,795 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 03:34:28" (1/1) ... [2024-11-13 15:34:28,827 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-13 15:34:29,040 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_23498b9a-7e35-4dcc-9f1b-e2881d99462b/sv-benchmarks/c/bitvector/soft_float_4-2a.c.cil.c[755,768] [2024-11-13 15:34:29,145 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 15:34:29,167 INFO L200 MainTranslator]: Completed pre-run [2024-11-13 15:34:29,178 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_23498b9a-7e35-4dcc-9f1b-e2881d99462b/sv-benchmarks/c/bitvector/soft_float_4-2a.c.cil.c[755,768] [2024-11-13 15:34:29,216 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 15:34:29,234 INFO L204 MainTranslator]: Completed translation [2024-11-13 15:34:29,235 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:34:29 WrapperNode [2024-11-13 15:34:29,235 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-13 15:34:29,237 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-13 15:34:29,237 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-13 15:34:29,237 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-13 15:34:29,245 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:34:29" (1/1) ... [2024-11-13 15:34:29,256 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:34:29" (1/1) ... [2024-11-13 15:34:29,280 INFO L138 Inliner]: procedures = 17, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 54 [2024-11-13 15:34:29,281 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-13 15:34:29,281 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-13 15:34:29,282 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-13 15:34:29,282 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-13 15:34:29,291 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:34:29" (1/1) ... [2024-11-13 15:34:29,291 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:34:29" (1/1) ... [2024-11-13 15:34:29,294 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:34:29" (1/1) ... [2024-11-13 15:34:29,309 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-11-13 15:34:29,310 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:34:29" (1/1) ... [2024-11-13 15:34:29,310 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:34:29" (1/1) ... [2024-11-13 15:34:29,318 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:34:29" (1/1) ... [2024-11-13 15:34:29,324 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:34:29" (1/1) ... [2024-11-13 15:34:29,326 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:34:29" (1/1) ... [2024-11-13 15:34:29,327 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:34:29" (1/1) ... [2024-11-13 15:34:29,330 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-13 15:34:29,331 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-13 15:34:29,332 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-13 15:34:29,332 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-13 15:34:29,333 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:34:29" (1/1) ... [2024-11-13 15:34:29,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-13 15:34:29,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:34:29,371 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-13 15:34:29,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-13 15:34:29,406 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-13 15:34:29,406 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-11-13 15:34:29,406 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2024-11-13 15:34:29,406 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2024-11-13 15:34:29,406 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-13 15:34:29,406 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-13 15:34:29,407 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2024-11-13 15:34:29,407 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2024-11-13 15:34:29,407 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-13 15:34:29,407 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-13 15:34:29,541 INFO L238 CfgBuilder]: Building ICFG [2024-11-13 15:34:29,548 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-13 15:34:29,931 INFO L? ?]: Removed 34 outVars from TransFormulas that were not future-live. [2024-11-13 15:34:29,931 INFO L287 CfgBuilder]: Performing block encoding [2024-11-13 15:34:29,942 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-13 15:34:29,943 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-13 15:34:29,943 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 03:34:29 BoogieIcfgContainer [2024-11-13 15:34:29,944 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-13 15:34:29,947 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-13 15:34:29,947 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-13 15:34:29,953 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-13 15:34:29,954 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 03:34:28" (1/3) ... [2024-11-13 15:34:29,954 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b9a47b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 03:34:29, skipping insertion in model container [2024-11-13 15:34:29,955 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:34:29" (2/3) ... [2024-11-13 15:34:29,955 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b9a47b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 03:34:29, skipping insertion in model container [2024-11-13 15:34:29,955 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 03:34:29" (3/3) ... [2024-11-13 15:34:29,957 INFO L112 eAbstractionObserver]: Analyzing ICFG soft_float_4-2a.c.cil.c [2024-11-13 15:34:29,976 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-13 15:34:29,978 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG soft_float_4-2a.c.cil.c that has 4 procedures, 54 locations, 1 initial locations, 2 loop locations, and 1 error locations. [2024-11-13 15:34:30,051 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-13 15:34:30,071 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;@ce65791, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-13 15:34:30,073 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-13 15:34:30,078 INFO L276 IsEmpty]: Start isEmpty. Operand has 54 states, 41 states have (on average 1.4878048780487805) internal successors, (61), 42 states have internal predecessors, (61), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-13 15:34:30,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-13 15:34:30,089 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:34:30,090 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:34:30,091 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:34:30,096 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:34:30,097 INFO L85 PathProgramCache]: Analyzing trace with hash -1559176103, now seen corresponding path program 1 times [2024-11-13 15:34:30,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:34:30,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [823402692] [2024-11-13 15:34:30,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:34:30,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:34:30,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:34:30,129 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:34:30,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-13 15:34:30,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:34:30,272 INFO L255 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-13 15:34:30,282 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:34:30,518 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-13 15:34:30,519 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 15:34:30,519 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:34:30,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823402692] [2024-11-13 15:34:30,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823402692] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:34:30,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 15:34:30,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-13 15:34:30,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188579762] [2024-11-13 15:34:30,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:34:30,536 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-13 15:34:30,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:34:30,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-13 15:34:30,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-11-13 15:34:30,566 INFO L87 Difference]: Start difference. First operand has 54 states, 41 states have (on average 1.4878048780487805) internal successors, (61), 42 states have internal predecessors, (61), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 15:34:30,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:34:30,787 INFO L93 Difference]: Finished difference Result 125 states and 189 transitions. [2024-11-13 15:34:30,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-13 15:34:30,793 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 31 [2024-11-13 15:34:30,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:34:30,802 INFO L225 Difference]: With dead ends: 125 [2024-11-13 15:34:30,802 INFO L226 Difference]: Without dead ends: 68 [2024-11-13 15:34:30,806 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-11-13 15:34:30,811 INFO L432 NwaCegarLoop]: 65 mSDtfsCounter, 13 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 445 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 15:34:30,813 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 445 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 15:34:30,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2024-11-13 15:34:30,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 61. [2024-11-13 15:34:30,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 46 states have (on average 1.3043478260869565) internal successors, (60), 48 states have internal predecessors, (60), 9 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (11), 8 states have call predecessors, (11), 8 states have call successors, (11) [2024-11-13 15:34:30,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 80 transitions. [2024-11-13 15:34:30,865 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 80 transitions. Word has length 31 [2024-11-13 15:34:30,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:34:30,866 INFO L471 AbstractCegarLoop]: Abstraction has 61 states and 80 transitions. [2024-11-13 15:34:30,866 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 15:34:30,867 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 80 transitions. [2024-11-13 15:34:30,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-13 15:34:30,869 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:34:30,869 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:34:30,885 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-13 15:34:31,071 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:34:31,071 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:34:31,072 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:34:31,072 INFO L85 PathProgramCache]: Analyzing trace with hash 2128908713, now seen corresponding path program 1 times [2024-11-13 15:34:31,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:34:31,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [638317565] [2024-11-13 15:34:31,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:34:31,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:34:31,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:34:31,078 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:34:31,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-13 15:34:31,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:34:31,158 INFO L255 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-13 15:34:31,164 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:34:31,498 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-13 15:34:31,499 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:34:31,923 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-13 15:34:31,925 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:34:31,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638317565] [2024-11-13 15:34:31,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638317565] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:34:31,925 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 15:34:31,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2024-11-13 15:34:31,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526346004] [2024-11-13 15:34:31,926 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 15:34:31,927 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-13 15:34:31,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:34:31,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-13 15:34:31,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2024-11-13 15:34:31,933 INFO L87 Difference]: Start difference. First operand 61 states and 80 transitions. Second operand has 20 states, 16 states have (on average 2.0) internal successors, (32), 14 states have internal predecessors, (32), 6 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-13 15:34:32,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:34:32,236 INFO L93 Difference]: Finished difference Result 129 states and 177 transitions. [2024-11-13 15:34:32,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-13 15:34:32,237 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 16 states have (on average 2.0) internal successors, (32), 14 states have internal predecessors, (32), 6 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 35 [2024-11-13 15:34:32,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:34:32,239 INFO L225 Difference]: With dead ends: 129 [2024-11-13 15:34:32,239 INFO L226 Difference]: Without dead ends: 101 [2024-11-13 15:34:32,240 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2024-11-13 15:34:32,241 INFO L432 NwaCegarLoop]: 98 mSDtfsCounter, 39 mSDsluCounter, 1021 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 1119 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-13 15:34:32,242 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 1119 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-13 15:34:32,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2024-11-13 15:34:32,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 83. [2024-11-13 15:34:32,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 62 states have (on average 1.2903225806451613) internal successors, (80), 65 states have internal predecessors, (80), 13 states have call successors, (13), 5 states have call predecessors, (13), 7 states have return successors, (20), 12 states have call predecessors, (20), 12 states have call successors, (20) [2024-11-13 15:34:32,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 113 transitions. [2024-11-13 15:34:32,274 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 113 transitions. Word has length 35 [2024-11-13 15:34:32,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:34:32,275 INFO L471 AbstractCegarLoop]: Abstraction has 83 states and 113 transitions. [2024-11-13 15:34:32,275 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 16 states have (on average 2.0) internal successors, (32), 14 states have internal predecessors, (32), 6 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-13 15:34:32,275 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 113 transitions. [2024-11-13 15:34:32,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-13 15:34:32,277 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:34:32,277 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:34:32,298 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-13 15:34:32,481 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:34:32,481 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:34:32,482 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:34:32,482 INFO L85 PathProgramCache]: Analyzing trace with hash 2071650411, now seen corresponding path program 1 times [2024-11-13 15:34:32,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:34:32,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1093504976] [2024-11-13 15:34:32,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:34:32,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:34:32,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:34:32,485 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:34:32,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-13 15:34:32,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:34:32,563 INFO L255 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-13 15:34:32,566 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:34:32,683 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-13 15:34:32,684 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:34:32,761 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-13 15:34:32,761 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:34:32,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093504976] [2024-11-13 15:34:32,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093504976] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:34:32,762 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 15:34:32,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2024-11-13 15:34:32,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581959966] [2024-11-13 15:34:32,762 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 15:34:32,762 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-13 15:34:32,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:34:32,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-13 15:34:32,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-11-13 15:34:32,764 INFO L87 Difference]: Start difference. First operand 83 states and 113 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-13 15:34:32,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:34:32,924 INFO L93 Difference]: Finished difference Result 138 states and 183 transitions. [2024-11-13 15:34:32,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-13 15:34:32,930 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 35 [2024-11-13 15:34:32,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:34:32,932 INFO L225 Difference]: With dead ends: 138 [2024-11-13 15:34:32,933 INFO L226 Difference]: Without dead ends: 98 [2024-11-13 15:34:32,933 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-11-13 15:34:32,937 INFO L432 NwaCegarLoop]: 61 mSDtfsCounter, 15 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 15:34:32,937 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 477 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 15:34:32,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2024-11-13 15:34:32,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 82. [2024-11-13 15:34:32,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 61 states have (on average 1.2459016393442623) internal successors, (76), 64 states have internal predecessors, (76), 12 states have call successors, (12), 6 states have call predecessors, (12), 8 states have return successors, (19), 11 states have call predecessors, (19), 11 states have call successors, (19) [2024-11-13 15:34:32,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 107 transitions. [2024-11-13 15:34:32,970 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 107 transitions. Word has length 35 [2024-11-13 15:34:32,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:34:32,970 INFO L471 AbstractCegarLoop]: Abstraction has 82 states and 107 transitions. [2024-11-13 15:34:32,970 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-13 15:34:32,971 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 107 transitions. [2024-11-13 15:34:32,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-13 15:34:32,974 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:34:32,975 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:34:33,000 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-13 15:34:33,175 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:34:33,175 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:34:33,176 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:34:33,176 INFO L85 PathProgramCache]: Analyzing trace with hash 1843904016, now seen corresponding path program 1 times [2024-11-13 15:34:33,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:34:33,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1163092716] [2024-11-13 15:34:33,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:34:33,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:34:33,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:34:33,180 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:34:33,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-13 15:34:33,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:34:33,270 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-13 15:34:33,272 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:34:33,376 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-13 15:34:33,377 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:34:33,471 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-13 15:34:33,472 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:34:33,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163092716] [2024-11-13 15:34:33,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163092716] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:34:33,472 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 15:34:33,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2024-11-13 15:34:33,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864292623] [2024-11-13 15:34:33,473 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 15:34:33,473 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-13 15:34:33,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:34:33,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-13 15:34:33,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-11-13 15:34:33,476 INFO L87 Difference]: Start difference. First operand 82 states and 107 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 6 states have internal predecessors, (24), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-13 15:34:33,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:34:33,598 INFO L93 Difference]: Finished difference Result 121 states and 158 transitions. [2024-11-13 15:34:33,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-13 15:34:33,598 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 6 states have internal predecessors, (24), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 39 [2024-11-13 15:34:33,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:34:33,601 INFO L225 Difference]: With dead ends: 121 [2024-11-13 15:34:33,602 INFO L226 Difference]: Without dead ends: 97 [2024-11-13 15:34:33,604 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-11-13 15:34:33,605 INFO L432 NwaCegarLoop]: 66 mSDtfsCounter, 11 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 446 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 15:34:33,609 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 446 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 15:34:33,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2024-11-13 15:34:33,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 92. [2024-11-13 15:34:33,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 68 states have (on average 1.2205882352941178) internal successors, (83), 71 states have internal predecessors, (83), 14 states have call successors, (14), 7 states have call predecessors, (14), 9 states have return successors, (21), 13 states have call predecessors, (21), 13 states have call successors, (21) [2024-11-13 15:34:33,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 118 transitions. [2024-11-13 15:34:33,646 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 118 transitions. Word has length 39 [2024-11-13 15:34:33,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:34:33,647 INFO L471 AbstractCegarLoop]: Abstraction has 92 states and 118 transitions. [2024-11-13 15:34:33,647 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 6 states have internal predecessors, (24), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-13 15:34:33,647 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 118 transitions. [2024-11-13 15:34:33,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-13 15:34:33,649 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:34:33,649 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:34:33,672 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-13 15:34:33,853 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:34:33,853 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:34:33,854 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:34:33,854 INFO L85 PathProgramCache]: Analyzing trace with hash -2043364519, now seen corresponding path program 2 times [2024-11-13 15:34:33,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:34:33,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [628783454] [2024-11-13 15:34:33,854 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 15:34:33,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:34:33,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:34:33,858 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:34:33,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-13 15:34:33,922 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-13 15:34:33,922 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 15:34:33,924 INFO L255 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-13 15:34:33,926 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:34:34,223 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-13 15:34:34,225 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 15:34:34,226 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:34:34,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628783454] [2024-11-13 15:34:34,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628783454] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:34:34,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 15:34:34,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-11-13 15:34:34,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788588861] [2024-11-13 15:34:34,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:34:34,227 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-13 15:34:34,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:34:34,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-13 15:34:34,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2024-11-13 15:34:34,228 INFO L87 Difference]: Start difference. First operand 92 states and 118 transitions. Second operand has 12 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 15:34:34,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:34:34,529 INFO L93 Difference]: Finished difference Result 153 states and 201 transitions. [2024-11-13 15:34:34,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-13 15:34:34,530 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 39 [2024-11-13 15:34:34,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:34:34,532 INFO L225 Difference]: With dead ends: 153 [2024-11-13 15:34:34,533 INFO L226 Difference]: Without dead ends: 125 [2024-11-13 15:34:34,533 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2024-11-13 15:34:34,534 INFO L432 NwaCegarLoop]: 82 mSDtfsCounter, 29 mSDsluCounter, 698 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 780 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-13 15:34:34,535 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 780 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-13 15:34:34,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2024-11-13 15:34:34,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 115. [2024-11-13 15:34:34,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 85 states have (on average 1.2352941176470589) internal successors, (105), 89 states have internal predecessors, (105), 18 states have call successors, (18), 9 states have call predecessors, (18), 11 states have return successors, (25), 16 states have call predecessors, (25), 17 states have call successors, (25) [2024-11-13 15:34:34,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 148 transitions. [2024-11-13 15:34:34,557 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 148 transitions. Word has length 39 [2024-11-13 15:34:34,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:34:34,557 INFO L471 AbstractCegarLoop]: Abstraction has 115 states and 148 transitions. [2024-11-13 15:34:34,558 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 15:34:34,558 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 148 transitions. [2024-11-13 15:34:34,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-13 15:34:34,559 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:34:34,560 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:34:34,582 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-13 15:34:34,764 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:34:34,764 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:34:34,764 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:34:34,765 INFO L85 PathProgramCache]: Analyzing trace with hash -2100622821, now seen corresponding path program 2 times [2024-11-13 15:34:34,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:34:34,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [147010909] [2024-11-13 15:34:34,765 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 15:34:34,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:34:34,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:34:34,767 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:34:34,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-13 15:34:34,842 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-13 15:34:34,842 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 15:34:34,843 INFO L255 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-13 15:34:34,846 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:34:35,072 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-13 15:34:35,073 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 15:34:35,073 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:34:35,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147010909] [2024-11-13 15:34:35,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147010909] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:34:35,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 15:34:35,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-11-13 15:34:35,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687977671] [2024-11-13 15:34:35,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:34:35,075 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-13 15:34:35,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:34:35,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-13 15:34:35,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2024-11-13 15:34:35,077 INFO L87 Difference]: Start difference. First operand 115 states and 148 transitions. Second operand has 12 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 15:34:35,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:34:35,447 INFO L93 Difference]: Finished difference Result 133 states and 169 transitions. [2024-11-13 15:34:35,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-13 15:34:35,448 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 39 [2024-11-13 15:34:35,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:34:35,449 INFO L225 Difference]: With dead ends: 133 [2024-11-13 15:34:35,452 INFO L226 Difference]: Without dead ends: 131 [2024-11-13 15:34:35,453 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2024-11-13 15:34:35,454 INFO L432 NwaCegarLoop]: 82 mSDtfsCounter, 42 mSDsluCounter, 777 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 859 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-13 15:34:35,454 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 859 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-13 15:34:35,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2024-11-13 15:34:35,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 114. [2024-11-13 15:34:35,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 85 states have (on average 1.2352941176470589) internal successors, (105), 88 states have internal predecessors, (105), 17 states have call successors, (17), 9 states have call predecessors, (17), 11 states have return successors, (24), 16 states have call predecessors, (24), 16 states have call successors, (24) [2024-11-13 15:34:35,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 146 transitions. [2024-11-13 15:34:35,482 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 146 transitions. Word has length 39 [2024-11-13 15:34:35,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:34:35,483 INFO L471 AbstractCegarLoop]: Abstraction has 114 states and 146 transitions. [2024-11-13 15:34:35,483 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 15:34:35,483 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 146 transitions. [2024-11-13 15:34:35,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-13 15:34:35,484 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:34:35,484 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:34:35,507 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-13 15:34:35,685 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:34:35,685 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:34:35,686 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:34:35,686 INFO L85 PathProgramCache]: Analyzing trace with hash -519932515, now seen corresponding path program 1 times [2024-11-13 15:34:35,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:34:35,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1930233767] [2024-11-13 15:34:35,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:34:35,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:34:35,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:34:35,688 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:34:35,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-13 15:34:35,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:34:35,767 INFO L255 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-13 15:34:35,769 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:34:35,968 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-13 15:34:35,969 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:34:36,328 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:34:36,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930233767] [2024-11-13 15:34:36,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930233767] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:34:36,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1862987063] [2024-11-13 15:34:36,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:34:36,329 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-13 15:34:36,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/cvc4 [2024-11-13 15:34:36,331 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-13 15:34:36,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2024-11-13 15:34:36,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:34:36,453 INFO L255 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-13 15:34:36,455 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:34:36,555 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-13 15:34:36,556 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:34:36,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1862987063] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:34:36,625 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 15:34:36,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2024-11-13 15:34:36,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863632714] [2024-11-13 15:34:36,625 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 15:34:36,625 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-13 15:34:36,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:34:36,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-13 15:34:36,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2024-11-13 15:34:36,626 INFO L87 Difference]: Start difference. First operand 114 states and 146 transitions. Second operand has 11 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-13 15:34:36,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:34:36,980 INFO L93 Difference]: Finished difference Result 224 states and 288 transitions. [2024-11-13 15:34:36,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-13 15:34:36,981 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 39 [2024-11-13 15:34:36,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:34:36,983 INFO L225 Difference]: With dead ends: 224 [2024-11-13 15:34:36,983 INFO L226 Difference]: Without dead ends: 179 [2024-11-13 15:34:36,984 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2024-11-13 15:34:36,985 INFO L432 NwaCegarLoop]: 102 mSDtfsCounter, 38 mSDsluCounter, 839 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 941 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-13 15:34:36,985 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 941 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-13 15:34:36,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2024-11-13 15:34:37,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 166. [2024-11-13 15:34:37,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 124 states have (on average 1.217741935483871) internal successors, (151), 127 states have internal predecessors, (151), 25 states have call successors, (25), 14 states have call predecessors, (25), 16 states have return successors, (34), 24 states have call predecessors, (34), 24 states have call successors, (34) [2024-11-13 15:34:37,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 210 transitions. [2024-11-13 15:34:37,013 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 210 transitions. Word has length 39 [2024-11-13 15:34:37,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:34:37,013 INFO L471 AbstractCegarLoop]: Abstraction has 166 states and 210 transitions. [2024-11-13 15:34:37,013 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-13 15:34:37,013 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 210 transitions. [2024-11-13 15:34:37,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-13 15:34:37,015 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:34:37,015 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:34:37,038 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-13 15:34:37,217 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/cvc4 --incremental --print-success --lang smt (9)] Ended with exit code 0 [2024-11-13 15:34:37,415 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/cvc4 --incremental --print-success --lang smt [2024-11-13 15:34:37,416 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:34:37,417 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:34:37,417 INFO L85 PathProgramCache]: Analyzing trace with hash -781424423, now seen corresponding path program 1 times [2024-11-13 15:34:37,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:34:37,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [620791797] [2024-11-13 15:34:37,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:34:37,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:34:37,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:34:37,419 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:34:37,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-13 15:34:37,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:34:37,505 INFO L255 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-13 15:34:37,507 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:34:37,648 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-13 15:34:37,648 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 15:34:37,648 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:34:37,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620791797] [2024-11-13 15:34:37,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620791797] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:34:37,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 15:34:37,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-13 15:34:37,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763968136] [2024-11-13 15:34:37,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:34:37,650 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-13 15:34:37,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:34:37,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-13 15:34:37,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-13 15:34:37,651 INFO L87 Difference]: Start difference. First operand 166 states and 210 transitions. Second operand has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 15:34:37,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:34:37,799 INFO L93 Difference]: Finished difference Result 172 states and 215 transitions. [2024-11-13 15:34:37,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-13 15:34:37,800 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 39 [2024-11-13 15:34:37,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:34:37,806 INFO L225 Difference]: With dead ends: 172 [2024-11-13 15:34:37,806 INFO L226 Difference]: Without dead ends: 170 [2024-11-13 15:34:37,806 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-13 15:34:37,807 INFO L432 NwaCegarLoop]: 64 mSDtfsCounter, 3 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 15:34:37,808 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 304 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 15:34:37,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2024-11-13 15:34:37,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 170. [2024-11-13 15:34:37,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 127 states have (on average 1.2125984251968505) internal successors, (154), 130 states have internal predecessors, (154), 25 states have call successors, (25), 15 states have call predecessors, (25), 17 states have return successors, (34), 24 states have call predecessors, (34), 24 states have call successors, (34) [2024-11-13 15:34:37,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 213 transitions. [2024-11-13 15:34:37,845 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 213 transitions. Word has length 39 [2024-11-13 15:34:37,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:34:37,846 INFO L471 AbstractCegarLoop]: Abstraction has 170 states and 213 transitions. [2024-11-13 15:34:37,846 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 15:34:37,847 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 213 transitions. [2024-11-13 15:34:37,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-13 15:34:37,848 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:34:37,849 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:34:37,873 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-13 15:34:38,053 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:34:38,053 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:34:38,054 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:34:38,054 INFO L85 PathProgramCache]: Analyzing trace with hash -896846842, now seen corresponding path program 1 times [2024-11-13 15:34:38,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:34:38,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1635099266] [2024-11-13 15:34:38,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:34:38,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:34:38,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:34:38,057 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:34:38,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-13 15:34:38,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:34:38,136 INFO L255 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-13 15:34:38,138 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:34:38,288 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-13 15:34:38,289 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 15:34:38,289 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:34:38,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635099266] [2024-11-13 15:34:38,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635099266] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:34:38,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 15:34:38,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-11-13 15:34:38,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221739994] [2024-11-13 15:34:38,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:34:38,292 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-13 15:34:38,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:34:38,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-13 15:34:38,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2024-11-13 15:34:38,295 INFO L87 Difference]: Start difference. First operand 170 states and 213 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 9 states have internal predecessors, (28), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-13 15:34:38,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:34:38,601 INFO L93 Difference]: Finished difference Result 230 states and 293 transitions. [2024-11-13 15:34:38,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-13 15:34:38,602 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 9 states have internal predecessors, (28), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 44 [2024-11-13 15:34:38,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:34:38,604 INFO L225 Difference]: With dead ends: 230 [2024-11-13 15:34:38,604 INFO L226 Difference]: Without dead ends: 223 [2024-11-13 15:34:38,604 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2024-11-13 15:34:38,605 INFO L432 NwaCegarLoop]: 55 mSDtfsCounter, 23 mSDsluCounter, 472 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 527 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-13 15:34:38,606 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 527 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-13 15:34:38,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2024-11-13 15:34:38,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 185. [2024-11-13 15:34:38,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 138 states have (on average 1.210144927536232) internal successors, (167), 141 states have internal predecessors, (167), 28 states have call successors, (28), 15 states have call predecessors, (28), 18 states have return successors, (40), 28 states have call predecessors, (40), 27 states have call successors, (40) [2024-11-13 15:34:38,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 235 transitions. [2024-11-13 15:34:38,646 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 235 transitions. Word has length 44 [2024-11-13 15:34:38,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:34:38,647 INFO L471 AbstractCegarLoop]: Abstraction has 185 states and 235 transitions. [2024-11-13 15:34:38,647 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 9 states have internal predecessors, (28), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-13 15:34:38,647 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 235 transitions. [2024-11-13 15:34:38,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-13 15:34:38,649 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:34:38,649 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:34:38,674 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-13 15:34:38,853 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:34:38,853 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:34:38,854 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:34:38,854 INFO L85 PathProgramCache]: Analyzing trace with hash 1030344812, now seen corresponding path program 1 times [2024-11-13 15:34:38,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:34:38,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1993652720] [2024-11-13 15:34:38,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:34:38,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:34:38,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:34:38,857 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:34:38,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-13 15:34:38,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:34:38,932 INFO L255 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-13 15:34:38,935 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:34:39,097 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-13 15:34:39,097 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:34:39,303 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-13 15:34:39,303 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:34:39,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993652720] [2024-11-13 15:34:39,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993652720] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:34:39,303 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 15:34:39,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2024-11-13 15:34:39,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310710344] [2024-11-13 15:34:39,304 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 15:34:39,304 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-13 15:34:39,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:34:39,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-13 15:34:39,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2024-11-13 15:34:39,305 INFO L87 Difference]: Start difference. First operand 185 states and 235 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 12 states have internal predecessors, (35), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-13 15:34:39,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:34:39,658 INFO L93 Difference]: Finished difference Result 237 states and 301 transitions. [2024-11-13 15:34:39,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-13 15:34:39,659 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 12 states have internal predecessors, (35), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 46 [2024-11-13 15:34:39,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:34:39,661 INFO L225 Difference]: With dead ends: 237 [2024-11-13 15:34:39,662 INFO L226 Difference]: Without dead ends: 229 [2024-11-13 15:34:39,662 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2024-11-13 15:34:39,663 INFO L432 NwaCegarLoop]: 57 mSDtfsCounter, 36 mSDsluCounter, 537 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 594 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-13 15:34:39,663 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 594 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-13 15:34:39,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2024-11-13 15:34:39,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 196. [2024-11-13 15:34:39,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 147 states have (on average 1.2040816326530612) internal successors, (177), 149 states have internal predecessors, (177), 29 states have call successors, (29), 15 states have call predecessors, (29), 19 states have return successors, (42), 31 states have call predecessors, (42), 28 states have call successors, (42) [2024-11-13 15:34:39,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 248 transitions. [2024-11-13 15:34:39,686 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 248 transitions. Word has length 46 [2024-11-13 15:34:39,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:34:39,687 INFO L471 AbstractCegarLoop]: Abstraction has 196 states and 248 transitions. [2024-11-13 15:34:39,687 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 12 states have internal predecessors, (35), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-13 15:34:39,687 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 248 transitions. [2024-11-13 15:34:39,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-13 15:34:39,688 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:34:39,688 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:34:39,710 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-13 15:34:39,889 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:34:39,894 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:34:39,894 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:34:39,895 INFO L85 PathProgramCache]: Analyzing trace with hash 1087603114, now seen corresponding path program 1 times [2024-11-13 15:34:39,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:34:39,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [12115021] [2024-11-13 15:34:39,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:34:39,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:34:39,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:34:39,897 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:34:39,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-13 15:34:39,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:34:39,963 INFO L255 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-13 15:34:39,965 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:34:40,004 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-13 15:34:40,005 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 15:34:40,005 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:34:40,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12115021] [2024-11-13 15:34:40,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12115021] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:34:40,005 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 15:34:40,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-13 15:34:40,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810249957] [2024-11-13 15:34:40,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:34:40,006 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-13 15:34:40,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:34:40,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-13 15:34:40,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-13 15:34:40,006 INFO L87 Difference]: Start difference. First operand 196 states and 248 transitions. Second operand has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2024-11-13 15:34:40,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:34:40,066 INFO L93 Difference]: Finished difference Result 204 states and 255 transitions. [2024-11-13 15:34:40,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-13 15:34:40,067 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 46 [2024-11-13 15:34:40,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:34:40,069 INFO L225 Difference]: With dead ends: 204 [2024-11-13 15:34:40,069 INFO L226 Difference]: Without dead ends: 189 [2024-11-13 15:34:40,069 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-13 15:34:40,070 INFO L432 NwaCegarLoop]: 64 mSDtfsCounter, 3 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-13 15:34:40,070 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 312 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 15:34:40,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2024-11-13 15:34:40,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 181. [2024-11-13 15:34:40,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 136 states have (on average 1.2058823529411764) internal successors, (164), 139 states have internal predecessors, (164), 26 states have call successors, (26), 14 states have call predecessors, (26), 18 states have return successors, (38), 27 states have call predecessors, (38), 25 states have call successors, (38) [2024-11-13 15:34:40,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 228 transitions. [2024-11-13 15:34:40,093 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 228 transitions. Word has length 46 [2024-11-13 15:34:40,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:34:40,093 INFO L471 AbstractCegarLoop]: Abstraction has 181 states and 228 transitions. [2024-11-13 15:34:40,094 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2024-11-13 15:34:40,094 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 228 transitions. [2024-11-13 15:34:40,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-13 15:34:40,095 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:34:40,095 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:34:40,118 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-13 15:34:40,296 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:34:40,296 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:34:40,297 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:34:40,297 INFO L85 PathProgramCache]: Analyzing trace with hash -954213068, now seen corresponding path program 1 times [2024-11-13 15:34:40,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:34:40,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [818522249] [2024-11-13 15:34:40,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:34:40,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:34:40,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:34:40,299 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:34:40,301 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-13 15:34:40,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:34:40,366 INFO L255 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-13 15:34:40,368 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:34:40,534 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-13 15:34:40,534 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:34:40,794 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-13 15:34:40,794 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:34:40,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818522249] [2024-11-13 15:34:40,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818522249] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:34:40,794 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 15:34:40,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2024-11-13 15:34:40,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293552498] [2024-11-13 15:34:40,795 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 15:34:40,795 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-13 15:34:40,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:34:40,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-13 15:34:40,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2024-11-13 15:34:40,796 INFO L87 Difference]: Start difference. First operand 181 states and 228 transitions. Second operand has 16 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-13 15:34:41,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:34:41,647 INFO L93 Difference]: Finished difference Result 260 states and 341 transitions. [2024-11-13 15:34:41,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-13 15:34:41,647 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 48 [2024-11-13 15:34:41,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:34:41,650 INFO L225 Difference]: With dead ends: 260 [2024-11-13 15:34:41,650 INFO L226 Difference]: Without dead ends: 253 [2024-11-13 15:34:41,651 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2024-11-13 15:34:41,651 INFO L432 NwaCegarLoop]: 63 mSDtfsCounter, 44 mSDsluCounter, 746 mSDsCounter, 0 mSdLazyCounter, 369 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 809 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-13 15:34:41,652 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 809 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 369 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-13 15:34:41,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2024-11-13 15:34:41,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 191. [2024-11-13 15:34:41,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 142 states have (on average 1.1971830985915493) internal successors, (170), 147 states have internal predecessors, (170), 28 states have call successors, (28), 14 states have call predecessors, (28), 20 states have return successors, (43), 29 states have call predecessors, (43), 27 states have call successors, (43) [2024-11-13 15:34:41,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 241 transitions. [2024-11-13 15:34:41,698 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 241 transitions. Word has length 48 [2024-11-13 15:34:41,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:34:41,698 INFO L471 AbstractCegarLoop]: Abstraction has 191 states and 241 transitions. [2024-11-13 15:34:41,699 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-13 15:34:41,699 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 241 transitions. [2024-11-13 15:34:41,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-13 15:34:41,704 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:34:41,705 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:34:41,721 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-13 15:34:41,905 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:34:41,906 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:34:41,906 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:34:41,906 INFO L85 PathProgramCache]: Analyzing trace with hash -533809934, now seen corresponding path program 1 times [2024-11-13 15:34:41,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:34:41,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [885654223] [2024-11-13 15:34:41,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:34:41,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:34:41,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:34:41,908 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:34:41,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-13 15:34:41,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:34:41,976 INFO L255 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-13 15:34:41,977 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:34:42,099 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-13 15:34:42,100 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:34:42,327 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-13 15:34:42,328 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:34:42,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885654223] [2024-11-13 15:34:42,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885654223] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:34:42,329 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 15:34:42,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2024-11-13 15:34:42,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224641027] [2024-11-13 15:34:42,330 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 15:34:42,330 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-13 15:34:42,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:34:42,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-13 15:34:42,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2024-11-13 15:34:42,332 INFO L87 Difference]: Start difference. First operand 191 states and 241 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-13 15:34:42,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:34:42,728 INFO L93 Difference]: Finished difference Result 247 states and 316 transitions. [2024-11-13 15:34:42,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-13 15:34:42,729 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 48 [2024-11-13 15:34:42,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:34:42,732 INFO L225 Difference]: With dead ends: 247 [2024-11-13 15:34:42,732 INFO L226 Difference]: Without dead ends: 232 [2024-11-13 15:34:42,732 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2024-11-13 15:34:42,735 INFO L432 NwaCegarLoop]: 79 mSDtfsCounter, 21 mSDsluCounter, 698 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 777 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-13 15:34:42,735 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 777 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-13 15:34:42,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2024-11-13 15:34:42,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 189. [2024-11-13 15:34:42,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 140 states have (on average 1.1928571428571428) internal successors, (167), 147 states have internal predecessors, (167), 27 states have call successors, (27), 14 states have call predecessors, (27), 21 states have return successors, (46), 27 states have call predecessors, (46), 26 states have call successors, (46) [2024-11-13 15:34:42,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 240 transitions. [2024-11-13 15:34:42,770 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 240 transitions. Word has length 48 [2024-11-13 15:34:42,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:34:42,771 INFO L471 AbstractCegarLoop]: Abstraction has 189 states and 240 transitions. [2024-11-13 15:34:42,771 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-13 15:34:42,771 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 240 transitions. [2024-11-13 15:34:42,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-13 15:34:42,777 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:34:42,778 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:34:42,801 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-13 15:34:42,978 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:34:42,979 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:34:42,979 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:34:42,979 INFO L85 PathProgramCache]: Analyzing trace with hash 1155133808, now seen corresponding path program 1 times [2024-11-13 15:34:42,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:34:42,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1611072182] [2024-11-13 15:34:42,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:34:42,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:34:42,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:34:42,981 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:34:42,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-13 15:34:43,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:34:43,053 INFO L255 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-13 15:34:43,055 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:34:43,258 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-13 15:34:43,259 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:34:43,776 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-13 15:34:43,777 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:34:43,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611072182] [2024-11-13 15:34:43,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611072182] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:34:43,777 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 15:34:43,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2024-11-13 15:34:43,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093833630] [2024-11-13 15:34:43,778 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 15:34:43,778 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-13 15:34:43,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:34:43,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-13 15:34:43,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=496, Unknown=0, NotChecked=0, Total=552 [2024-11-13 15:34:43,780 INFO L87 Difference]: Start difference. First operand 189 states and 240 transitions. Second operand has 24 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 20 states have internal predecessors, (43), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-13 15:34:45,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:34:45,380 INFO L93 Difference]: Finished difference Result 266 states and 361 transitions. [2024-11-13 15:34:45,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-13 15:34:45,381 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 20 states have internal predecessors, (43), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 48 [2024-11-13 15:34:45,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:34:45,383 INFO L225 Difference]: With dead ends: 266 [2024-11-13 15:34:45,384 INFO L226 Difference]: Without dead ends: 225 [2024-11-13 15:34:45,385 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=156, Invalid=1404, Unknown=0, NotChecked=0, Total=1560 [2024-11-13 15:34:45,385 INFO L432 NwaCegarLoop]: 69 mSDtfsCounter, 58 mSDsluCounter, 1160 mSDsCounter, 0 mSdLazyCounter, 653 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 1229 SdHoareTripleChecker+Invalid, 670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 653 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-13 15:34:45,386 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 1229 Invalid, 670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 653 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-13 15:34:45,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2024-11-13 15:34:45,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 176. [2024-11-13 15:34:45,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 130 states have (on average 1.2153846153846153) internal successors, (158), 139 states have internal predecessors, (158), 25 states have call successors, (25), 11 states have call predecessors, (25), 20 states have return successors, (51), 25 states have call predecessors, (51), 24 states have call successors, (51) [2024-11-13 15:34:45,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 234 transitions. [2024-11-13 15:34:45,423 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 234 transitions. Word has length 48 [2024-11-13 15:34:45,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:34:45,423 INFO L471 AbstractCegarLoop]: Abstraction has 176 states and 234 transitions. [2024-11-13 15:34:45,424 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 20 states have internal predecessors, (43), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-13 15:34:45,424 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 234 transitions. [2024-11-13 15:34:45,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-13 15:34:45,425 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:34:45,425 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:34:45,452 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-13 15:34:45,626 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:34:45,627 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:34:45,628 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:34:45,629 INFO L85 PathProgramCache]: Analyzing trace with hash -1995601196, now seen corresponding path program 2 times [2024-11-13 15:34:45,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:34:45,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1460932157] [2024-11-13 15:34:45,629 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 15:34:45,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:34:45,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:34:45,632 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:34:45,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-13 15:34:45,703 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 15:34:45,704 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 15:34:45,705 INFO L255 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-13 15:34:45,707 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:34:45,852 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-13 15:34:45,852 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:34:46,039 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-13 15:34:46,039 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:34:46,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460932157] [2024-11-13 15:34:46,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460932157] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:34:46,040 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 15:34:46,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2024-11-13 15:34:46,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917747277] [2024-11-13 15:34:46,040 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 15:34:46,040 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-13 15:34:46,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:34:46,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-13 15:34:46,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2024-11-13 15:34:46,041 INFO L87 Difference]: Start difference. First operand 176 states and 234 transitions. Second operand has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 12 states have internal predecessors, (37), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-13 15:34:46,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:34:46,583 INFO L93 Difference]: Finished difference Result 230 states and 324 transitions. [2024-11-13 15:34:46,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-13 15:34:46,584 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 12 states have internal predecessors, (37), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 48 [2024-11-13 15:34:46,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:34:46,586 INFO L225 Difference]: With dead ends: 230 [2024-11-13 15:34:46,586 INFO L226 Difference]: Without dead ends: 223 [2024-11-13 15:34:46,588 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2024-11-13 15:34:46,589 INFO L432 NwaCegarLoop]: 73 mSDtfsCounter, 59 mSDsluCounter, 716 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 789 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-13 15:34:46,589 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 789 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-13 15:34:46,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2024-11-13 15:34:46,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 178. [2024-11-13 15:34:46,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 131 states have (on average 1.213740458015267) internal successors, (159), 140 states have internal predecessors, (159), 26 states have call successors, (26), 11 states have call predecessors, (26), 20 states have return successors, (52), 26 states have call predecessors, (52), 25 states have call successors, (52) [2024-11-13 15:34:46,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 237 transitions. [2024-11-13 15:34:46,626 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 237 transitions. Word has length 48 [2024-11-13 15:34:46,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:34:46,627 INFO L471 AbstractCegarLoop]: Abstraction has 178 states and 237 transitions. [2024-11-13 15:34:46,627 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 12 states have internal predecessors, (37), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-13 15:34:46,627 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 237 transitions. [2024-11-13 15:34:46,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-13 15:34:46,628 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:34:46,628 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:34:46,651 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-13 15:34:46,829 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:34:46,829 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:34:46,829 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:34:46,830 INFO L85 PathProgramCache]: Analyzing trace with hash -161776872, now seen corresponding path program 2 times [2024-11-13 15:34:46,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:34:46,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [63688428] [2024-11-13 15:34:46,830 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 15:34:46,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:34:46,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:34:46,832 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:34:46,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-13 15:34:46,923 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 15:34:46,923 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 15:34:46,926 INFO L255 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-13 15:34:46,927 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:34:47,088 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-13 15:34:47,088 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:34:47,555 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-13 15:34:47,556 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:34:47,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63688428] [2024-11-13 15:34:47,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63688428] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:34:47,556 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 15:34:47,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2024-11-13 15:34:47,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342864111] [2024-11-13 15:34:47,556 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 15:34:47,557 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-13 15:34:47,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:34:47,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-13 15:34:47,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=496, Unknown=0, NotChecked=0, Total=552 [2024-11-13 15:34:47,558 INFO L87 Difference]: Start difference. First operand 178 states and 237 transitions. Second operand has 24 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 20 states have internal predecessors, (43), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-13 15:34:48,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:34:48,772 INFO L93 Difference]: Finished difference Result 236 states and 326 transitions. [2024-11-13 15:34:48,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-13 15:34:48,773 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 20 states have internal predecessors, (43), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 48 [2024-11-13 15:34:48,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:34:48,775 INFO L225 Difference]: With dead ends: 236 [2024-11-13 15:34:48,775 INFO L226 Difference]: Without dead ends: 223 [2024-11-13 15:34:48,776 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=137, Invalid=1269, Unknown=0, NotChecked=0, Total=1406 [2024-11-13 15:34:48,777 INFO L432 NwaCegarLoop]: 70 mSDtfsCounter, 49 mSDsluCounter, 1107 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 1177 SdHoareTripleChecker+Invalid, 567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-13 15:34:48,777 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 1177 Invalid, 567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-13 15:34:48,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2024-11-13 15:34:48,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 191. [2024-11-13 15:34:48,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 139 states have (on average 1.2014388489208634) internal successors, (167), 151 states have internal predecessors, (167), 28 states have call successors, (28), 11 states have call predecessors, (28), 23 states have return successors, (61), 28 states have call predecessors, (61), 27 states have call successors, (61) [2024-11-13 15:34:48,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 256 transitions. [2024-11-13 15:34:48,820 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 256 transitions. Word has length 48 [2024-11-13 15:34:48,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:34:48,821 INFO L471 AbstractCegarLoop]: Abstraction has 191 states and 256 transitions. [2024-11-13 15:34:48,821 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 20 states have internal predecessors, (43), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-13 15:34:48,821 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 256 transitions. [2024-11-13 15:34:48,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-13 15:34:48,823 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:34:48,823 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:34:48,847 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-13 15:34:49,027 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:34:49,027 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:34:49,027 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:34:49,027 INFO L85 PathProgramCache]: Analyzing trace with hash 1644715609, now seen corresponding path program 1 times [2024-11-13 15:34:49,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:34:49,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1890718634] [2024-11-13 15:34:49,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:34:49,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:34:49,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:34:49,030 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:34:49,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-13 15:34:49,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:34:49,096 INFO L255 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-13 15:34:49,098 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:34:49,431 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-13 15:34:49,431 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 15:34:49,431 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:34:49,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890718634] [2024-11-13 15:34:49,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890718634] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:34:49,432 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 15:34:49,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2024-11-13 15:34:49,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385138271] [2024-11-13 15:34:49,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:34:49,432 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-13 15:34:49,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:34:49,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-13 15:34:49,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2024-11-13 15:34:49,445 INFO L87 Difference]: Start difference. First operand 191 states and 256 transitions. Second operand has 14 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 5 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-13 15:34:49,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:34:49,834 INFO L93 Difference]: Finished difference Result 289 states and 397 transitions. [2024-11-13 15:34:49,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-13 15:34:49,835 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 5 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 49 [2024-11-13 15:34:49,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:34:49,837 INFO L225 Difference]: With dead ends: 289 [2024-11-13 15:34:49,837 INFO L226 Difference]: Without dead ends: 230 [2024-11-13 15:34:49,837 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2024-11-13 15:34:49,838 INFO L432 NwaCegarLoop]: 95 mSDtfsCounter, 32 mSDsluCounter, 955 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 1050 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-13 15:34:49,838 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 1050 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-13 15:34:49,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2024-11-13 15:34:49,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 207. [2024-11-13 15:34:49,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 151 states have (on average 1.1788079470198676) internal successors, (178), 162 states have internal predecessors, (178), 32 states have call successors, (32), 12 states have call predecessors, (32), 23 states have return successors, (64), 32 states have call predecessors, (64), 31 states have call successors, (64) [2024-11-13 15:34:49,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 274 transitions. [2024-11-13 15:34:49,880 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 274 transitions. Word has length 49 [2024-11-13 15:34:49,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:34:49,881 INFO L471 AbstractCegarLoop]: Abstraction has 207 states and 274 transitions. [2024-11-13 15:34:49,881 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 5 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-13 15:34:49,881 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 274 transitions. [2024-11-13 15:34:49,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-13 15:34:49,882 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:34:49,882 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:34:49,903 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-13 15:34:50,087 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:34:50,087 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:34:50,087 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:34:50,088 INFO L85 PathProgramCache]: Analyzing trace with hash 389354397, now seen corresponding path program 1 times [2024-11-13 15:34:50,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:34:50,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2002772245] [2024-11-13 15:34:50,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:34:50,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:34:50,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:34:50,090 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:34:50,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-13 15:34:50,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:34:50,147 INFO L255 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-13 15:34:50,149 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:34:50,449 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-13 15:34:50,449 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:34:50,830 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:34:50,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002772245] [2024-11-13 15:34:50,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2002772245] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:34:50,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1720887338] [2024-11-13 15:34:50,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:34:50,831 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-13 15:34:50,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/cvc4 [2024-11-13 15:34:50,833 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-13 15:34:50,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2024-11-13 15:34:50,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:34:50,945 INFO L255 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-13 15:34:50,947 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:34:51,109 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-13 15:34:51,109 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:34:51,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1720887338] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:34:51,337 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 15:34:51,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 13 [2024-11-13 15:34:51,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338068951] [2024-11-13 15:34:51,337 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 15:34:51,337 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-13 15:34:51,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:34:51,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-13 15:34:51,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2024-11-13 15:34:51,338 INFO L87 Difference]: Start difference. First operand 207 states and 274 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 11 states have internal predecessors, (35), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-13 15:34:51,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:34:51,825 INFO L93 Difference]: Finished difference Result 278 states and 366 transitions. [2024-11-13 15:34:51,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-13 15:34:51,826 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 11 states have internal predecessors, (35), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 49 [2024-11-13 15:34:51,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:34:51,828 INFO L225 Difference]: With dead ends: 278 [2024-11-13 15:34:51,828 INFO L226 Difference]: Without dead ends: 226 [2024-11-13 15:34:51,829 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 94 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2024-11-13 15:34:51,829 INFO L432 NwaCegarLoop]: 81 mSDtfsCounter, 38 mSDsluCounter, 736 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 817 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-13 15:34:51,830 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 817 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-13 15:34:51,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2024-11-13 15:34:51,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 213. [2024-11-13 15:34:51,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 156 states have (on average 1.1666666666666667) internal successors, (182), 167 states have internal predecessors, (182), 32 states have call successors, (32), 13 states have call predecessors, (32), 24 states have return successors, (64), 32 states have call predecessors, (64), 31 states have call successors, (64) [2024-11-13 15:34:51,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 278 transitions. [2024-11-13 15:34:51,865 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 278 transitions. Word has length 49 [2024-11-13 15:34:51,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:34:51,865 INFO L471 AbstractCegarLoop]: Abstraction has 213 states and 278 transitions. [2024-11-13 15:34:51,865 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 11 states have internal predecessors, (35), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-13 15:34:51,865 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 278 transitions. [2024-11-13 15:34:51,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-13 15:34:51,867 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:34:51,867 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:34:51,888 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-13 15:34:52,069 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/cvc4 --incremental --print-success --lang smt (21)] Ended with exit code 0 [2024-11-13 15:34:52,267 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/cvc4 --incremental --print-success --lang smt [2024-11-13 15:34:52,268 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:34:52,268 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:34:52,268 INFO L85 PathProgramCache]: Analyzing trace with hash -1636272491, now seen corresponding path program 2 times [2024-11-13 15:34:52,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:34:52,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1259019317] [2024-11-13 15:34:52,269 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 15:34:52,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:34:52,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:34:52,271 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:34:52,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-13 15:34:52,341 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 15:34:52,341 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 15:34:52,343 INFO L255 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-13 15:34:52,345 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:34:52,675 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-13 15:34:52,675 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 15:34:52,675 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:34:52,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259019317] [2024-11-13 15:34:52,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259019317] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:34:52,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 15:34:52,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2024-11-13 15:34:52,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170970488] [2024-11-13 15:34:52,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:34:52,676 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-13 15:34:52,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:34:52,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-13 15:34:52,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2024-11-13 15:34:52,676 INFO L87 Difference]: Start difference. First operand 213 states and 278 transitions. Second operand has 13 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-13 15:34:53,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:34:53,102 INFO L93 Difference]: Finished difference Result 285 states and 374 transitions. [2024-11-13 15:34:53,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-13 15:34:53,103 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 49 [2024-11-13 15:34:53,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:34:53,105 INFO L225 Difference]: With dead ends: 285 [2024-11-13 15:34:53,105 INFO L226 Difference]: Without dead ends: 226 [2024-11-13 15:34:53,105 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2024-11-13 15:34:53,106 INFO L432 NwaCegarLoop]: 100 mSDtfsCounter, 28 mSDsluCounter, 966 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 1066 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-13 15:34:53,106 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 1066 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-13 15:34:53,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2024-11-13 15:34:53,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 211. [2024-11-13 15:34:53,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 155 states have (on average 1.1612903225806452) internal successors, (180), 165 states have internal predecessors, (180), 32 states have call successors, (32), 13 states have call predecessors, (32), 23 states have return successors, (63), 32 states have call predecessors, (63), 31 states have call successors, (63) [2024-11-13 15:34:53,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 275 transitions. [2024-11-13 15:34:53,142 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 275 transitions. Word has length 49 [2024-11-13 15:34:53,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:34:53,142 INFO L471 AbstractCegarLoop]: Abstraction has 211 states and 275 transitions. [2024-11-13 15:34:53,142 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-13 15:34:53,142 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 275 transitions. [2024-11-13 15:34:53,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-13 15:34:53,143 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:34:53,144 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:34:53,163 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-11-13 15:34:53,354 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:34:53,354 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:34:53,354 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:34:53,355 INFO L85 PathProgramCache]: Analyzing trace with hash -615204137, now seen corresponding path program 1 times [2024-11-13 15:34:53,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:34:53,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [343619341] [2024-11-13 15:34:53,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:34:53,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:34:53,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:34:53,357 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:34:53,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-13 15:34:53,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:34:53,428 INFO L255 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-13 15:34:53,430 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:34:53,723 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-13 15:34:53,723 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 15:34:53,723 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:34:53,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343619341] [2024-11-13 15:34:53,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343619341] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:34:53,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 15:34:53,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2024-11-13 15:34:53,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277656829] [2024-11-13 15:34:53,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:34:53,724 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-13 15:34:53,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:34:53,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-13 15:34:53,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2024-11-13 15:34:53,727 INFO L87 Difference]: Start difference. First operand 211 states and 275 transitions. Second operand has 14 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 12 states have internal predecessors, (32), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-13 15:34:54,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:34:54,283 INFO L93 Difference]: Finished difference Result 274 states and 357 transitions. [2024-11-13 15:34:54,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-13 15:34:54,284 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 12 states have internal predecessors, (32), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 49 [2024-11-13 15:34:54,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:34:54,285 INFO L225 Difference]: With dead ends: 274 [2024-11-13 15:34:54,285 INFO L226 Difference]: Without dead ends: 222 [2024-11-13 15:34:54,286 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2024-11-13 15:34:54,286 INFO L432 NwaCegarLoop]: 85 mSDtfsCounter, 42 mSDsluCounter, 849 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 934 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-13 15:34:54,286 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 934 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-13 15:34:54,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2024-11-13 15:34:54,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 210. [2024-11-13 15:34:54,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 154 states have (on average 1.155844155844156) internal successors, (178), 164 states have internal predecessors, (178), 32 states have call successors, (32), 13 states have call predecessors, (32), 23 states have return successors, (63), 32 states have call predecessors, (63), 31 states have call successors, (63) [2024-11-13 15:34:54,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 273 transitions. [2024-11-13 15:34:54,319 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 273 transitions. Word has length 49 [2024-11-13 15:34:54,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:34:54,319 INFO L471 AbstractCegarLoop]: Abstraction has 210 states and 273 transitions. [2024-11-13 15:34:54,319 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 12 states have internal predecessors, (32), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-13 15:34:54,320 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 273 transitions. [2024-11-13 15:34:54,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-13 15:34:54,321 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:34:54,321 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:34:54,338 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-11-13 15:34:54,521 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:34:54,522 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:34:54,522 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:34:54,522 INFO L85 PathProgramCache]: Analyzing trace with hash 2130425916, now seen corresponding path program 1 times [2024-11-13 15:34:54,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:34:54,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1579830302] [2024-11-13 15:34:54,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:34:54,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:34:54,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:34:54,525 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:34:54,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-13 15:34:54,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:34:54,599 INFO L255 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-13 15:34:54,601 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:34:54,666 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-13 15:34:54,666 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 15:34:54,666 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:34:54,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579830302] [2024-11-13 15:34:54,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579830302] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:34:54,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 15:34:54,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-13 15:34:54,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797001403] [2024-11-13 15:34:54,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:34:54,667 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-13 15:34:54,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:34:54,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-13 15:34:54,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-11-13 15:34:54,668 INFO L87 Difference]: Start difference. First operand 210 states and 273 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 7 states have internal predecessors, (36), 3 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-13 15:34:54,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:34:54,805 INFO L93 Difference]: Finished difference Result 272 states and 346 transitions. [2024-11-13 15:34:54,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-13 15:34:54,805 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 7 states have internal predecessors, (36), 3 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 53 [2024-11-13 15:34:54,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:34:54,807 INFO L225 Difference]: With dead ends: 272 [2024-11-13 15:34:54,807 INFO L226 Difference]: Without dead ends: 225 [2024-11-13 15:34:54,808 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-11-13 15:34:54,809 INFO L432 NwaCegarLoop]: 64 mSDtfsCounter, 12 mSDsluCounter, 429 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 493 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 15:34:54,809 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 493 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 15:34:54,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2024-11-13 15:34:54,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 210. [2024-11-13 15:34:54,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 154 states have (on average 1.155844155844156) internal successors, (178), 164 states have internal predecessors, (178), 32 states have call successors, (32), 13 states have call predecessors, (32), 23 states have return successors, (63), 32 states have call predecessors, (63), 31 states have call successors, (63) [2024-11-13 15:34:54,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 273 transitions. [2024-11-13 15:34:54,844 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 273 transitions. Word has length 53 [2024-11-13 15:34:54,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:34:54,844 INFO L471 AbstractCegarLoop]: Abstraction has 210 states and 273 transitions. [2024-11-13 15:34:54,844 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 7 states have internal predecessors, (36), 3 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-13 15:34:54,844 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 273 transitions. [2024-11-13 15:34:54,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-13 15:34:54,845 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:34:54,846 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:34:54,868 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-11-13 15:34:55,050 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:34:55,050 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:34:55,050 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:34:55,050 INFO L85 PathProgramCache]: Analyzing trace with hash 1403333593, now seen corresponding path program 1 times [2024-11-13 15:34:55,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:34:55,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1461874444] [2024-11-13 15:34:55,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:34:55,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:34:55,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:34:55,053 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:34:55,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-13 15:34:55,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:34:55,111 INFO L255 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-13 15:34:55,112 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:34:55,358 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-13 15:34:55,358 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:34:55,608 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:34:55,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461874444] [2024-11-13 15:34:55,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461874444] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:34:55,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [195981563] [2024-11-13 15:34:55,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:34:55,608 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-13 15:34:55,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/cvc4 [2024-11-13 15:34:55,610 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-13 15:34:55,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2024-11-13 15:34:55,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:34:55,712 INFO L255 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-13 15:34:55,713 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:34:55,837 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-13 15:34:55,838 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 15:34:55,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [195981563] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:34:55,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-13 15:34:55,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 10 [2024-11-13 15:34:55,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192581550] [2024-11-13 15:34:55,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:34:55,839 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-13 15:34:55,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:34:55,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-13 15:34:55,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2024-11-13 15:34:55,840 INFO L87 Difference]: Start difference. First operand 210 states and 273 transitions. Second operand has 8 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-13 15:35:00,608 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-13 15:35:00,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:35:00,703 INFO L93 Difference]: Finished difference Result 233 states and 307 transitions. [2024-11-13 15:35:00,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-13 15:35:00,704 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 49 [2024-11-13 15:35:00,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:35:00,706 INFO L225 Difference]: With dead ends: 233 [2024-11-13 15:35:00,706 INFO L226 Difference]: Without dead ends: 231 [2024-11-13 15:35:00,706 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 91 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2024-11-13 15:35:00,708 INFO L432 NwaCegarLoop]: 64 mSDtfsCounter, 13 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2024-11-13 15:35:00,708 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 305 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 56 Invalid, 1 Unknown, 0 Unchecked, 4.8s Time] [2024-11-13 15:35:00,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2024-11-13 15:35:00,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 215. [2024-11-13 15:35:00,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 157 states have (on average 1.1528662420382165) internal successors, (181), 168 states have internal predecessors, (181), 33 states have call successors, (33), 14 states have call predecessors, (33), 24 states have return successors, (64), 32 states have call predecessors, (64), 32 states have call successors, (64) [2024-11-13 15:35:00,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 278 transitions. [2024-11-13 15:35:00,751 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 278 transitions. Word has length 49 [2024-11-13 15:35:00,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:35:00,751 INFO L471 AbstractCegarLoop]: Abstraction has 215 states and 278 transitions. [2024-11-13 15:35:00,751 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-13 15:35:00,752 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 278 transitions. [2024-11-13 15:35:00,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-13 15:35:00,753 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:35:00,753 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:35:00,756 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/cvc4 --incremental --print-success --lang smt (26)] Ended with exit code 0 [2024-11-13 15:35:00,966 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-11-13 15:35:01,153 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/cvc4 --incremental --print-success --lang smt,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:35:01,154 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:35:01,154 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:35:01,154 INFO L85 PathProgramCache]: Analyzing trace with hash 1102559420, now seen corresponding path program 1 times [2024-11-13 15:35:01,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:35:01,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [728375308] [2024-11-13 15:35:01,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:35:01,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:35:01,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:35:01,156 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:35:01,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-13 15:35:01,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:35:01,211 INFO L255 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-13 15:35:01,212 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:35:01,292 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-13 15:35:01,293 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:35:01,462 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-13 15:35:01,462 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:35:01,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728375308] [2024-11-13 15:35:01,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728375308] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:35:01,462 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 15:35:01,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2024-11-13 15:35:01,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809408187] [2024-11-13 15:35:01,463 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 15:35:01,463 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-13 15:35:01,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:35:01,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-13 15:35:01,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2024-11-13 15:35:01,464 INFO L87 Difference]: Start difference. First operand 215 states and 278 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 11 states have internal predecessors, (43), 4 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (9), 6 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-13 15:35:01,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:35:01,603 INFO L93 Difference]: Finished difference Result 249 states and 330 transitions. [2024-11-13 15:35:01,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-13 15:35:01,604 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 11 states have internal predecessors, (43), 4 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (9), 6 states have call predecessors, (9), 3 states have call successors, (9) Word has length 50 [2024-11-13 15:35:01,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:35:01,606 INFO L225 Difference]: With dead ends: 249 [2024-11-13 15:35:01,606 INFO L226 Difference]: Without dead ends: 232 [2024-11-13 15:35:01,607 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2024-11-13 15:35:01,607 INFO L432 NwaCegarLoop]: 71 mSDtfsCounter, 10 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 476 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 15:35:01,608 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 476 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 15:35:01,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2024-11-13 15:35:01,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 222. [2024-11-13 15:35:01,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 161 states have (on average 1.1490683229813665) internal successors, (185), 173 states have internal predecessors, (185), 35 states have call successors, (35), 14 states have call predecessors, (35), 25 states have return successors, (76), 34 states have call predecessors, (76), 34 states have call successors, (76) [2024-11-13 15:35:01,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 296 transitions. [2024-11-13 15:35:01,645 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 296 transitions. Word has length 50 [2024-11-13 15:35:01,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:35:01,645 INFO L471 AbstractCegarLoop]: Abstraction has 222 states and 296 transitions. [2024-11-13 15:35:01,645 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 11 states have internal predecessors, (43), 4 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (9), 6 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-13 15:35:01,645 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 296 transitions. [2024-11-13 15:35:01,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-13 15:35:01,646 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:35:01,647 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:35:01,670 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-11-13 15:35:01,847 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:35:01,848 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:35:01,848 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:35:01,848 INFO L85 PathProgramCache]: Analyzing trace with hash -784485475, now seen corresponding path program 1 times [2024-11-13 15:35:01,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:35:01,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [740837406] [2024-11-13 15:35:01,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:35:01,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:35:01,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:35:01,851 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:35:01,853 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-13 15:35:01,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:35:01,932 INFO L255 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-13 15:35:01,944 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:35:02,051 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-13 15:35:02,051 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:35:02,235 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-13 15:35:02,235 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:35:02,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740837406] [2024-11-13 15:35:02,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740837406] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:35:02,235 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 15:35:02,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2024-11-13 15:35:02,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037737931] [2024-11-13 15:35:02,236 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 15:35:02,236 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-13 15:35:02,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:35:02,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-13 15:35:02,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2024-11-13 15:35:02,237 INFO L87 Difference]: Start difference. First operand 222 states and 296 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 11 states have internal predecessors, (40), 5 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-13 15:35:02,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:35:02,484 INFO L93 Difference]: Finished difference Result 298 states and 378 transitions. [2024-11-13 15:35:02,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-13 15:35:02,485 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 11 states have internal predecessors, (40), 5 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 50 [2024-11-13 15:35:02,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:35:02,487 INFO L225 Difference]: With dead ends: 298 [2024-11-13 15:35:02,487 INFO L226 Difference]: Without dead ends: 216 [2024-11-13 15:35:02,487 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2024-11-13 15:35:02,488 INFO L432 NwaCegarLoop]: 89 mSDtfsCounter, 46 mSDsluCounter, 642 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 731 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 15:35:02,488 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 731 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 15:35:02,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2024-11-13 15:35:02,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 208. [2024-11-13 15:35:02,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 153 states have (on average 1.1437908496732025) internal successors, (175), 163 states have internal predecessors, (175), 31 states have call successors, (31), 14 states have call predecessors, (31), 23 states have return successors, (67), 30 states have call predecessors, (67), 30 states have call successors, (67) [2024-11-13 15:35:02,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 273 transitions. [2024-11-13 15:35:02,524 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 273 transitions. Word has length 50 [2024-11-13 15:35:02,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:35:02,524 INFO L471 AbstractCegarLoop]: Abstraction has 208 states and 273 transitions. [2024-11-13 15:35:02,524 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 11 states have internal predecessors, (40), 5 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-13 15:35:02,524 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 273 transitions. [2024-11-13 15:35:02,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-13 15:35:02,525 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:35:02,526 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:35:02,548 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2024-11-13 15:35:02,726 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:35:02,727 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:35:02,727 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:35:02,727 INFO L85 PathProgramCache]: Analyzing trace with hash -1823823872, now seen corresponding path program 1 times [2024-11-13 15:35:02,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:35:02,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1633133411] [2024-11-13 15:35:02,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:35:02,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:35:02,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:35:02,729 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:35:02,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-11-13 15:35:02,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:35:02,788 INFO L255 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-13 15:35:02,789 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:35:02,887 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-13 15:35:02,887 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:35:03,127 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-13 15:35:03,127 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:35:03,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633133411] [2024-11-13 15:35:03,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633133411] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:35:03,127 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 15:35:03,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2024-11-13 15:35:03,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283782892] [2024-11-13 15:35:03,127 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 15:35:03,128 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-13 15:35:03,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:35:03,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-13 15:35:03,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2024-11-13 15:35:03,129 INFO L87 Difference]: Start difference. First operand 208 states and 273 transitions. Second operand has 16 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-13 15:35:03,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:35:03,482 INFO L93 Difference]: Finished difference Result 250 states and 337 transitions. [2024-11-13 15:35:03,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-13 15:35:03,483 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 50 [2024-11-13 15:35:03,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:35:03,485 INFO L225 Difference]: With dead ends: 250 [2024-11-13 15:35:03,485 INFO L226 Difference]: Without dead ends: 223 [2024-11-13 15:35:03,485 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2024-11-13 15:35:03,486 INFO L432 NwaCegarLoop]: 62 mSDtfsCounter, 30 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 468 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-13 15:35:03,486 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 468 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-13 15:35:03,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2024-11-13 15:35:03,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 192. [2024-11-13 15:35:03,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 141 states have (on average 1.1560283687943262) internal successors, (163), 151 states have internal predecessors, (163), 29 states have call successors, (29), 12 states have call predecessors, (29), 21 states have return successors, (63), 28 states have call predecessors, (63), 28 states have call successors, (63) [2024-11-13 15:35:03,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 255 transitions. [2024-11-13 15:35:03,519 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 255 transitions. Word has length 50 [2024-11-13 15:35:03,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:35:03,520 INFO L471 AbstractCegarLoop]: Abstraction has 192 states and 255 transitions. [2024-11-13 15:35:03,520 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-13 15:35:03,520 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 255 transitions. [2024-11-13 15:35:03,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-13 15:35:03,521 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:35:03,522 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:35:03,544 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2024-11-13 15:35:03,722 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:35:03,722 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:35:03,723 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:35:03,723 INFO L85 PathProgramCache]: Analyzing trace with hash 584098529, now seen corresponding path program 1 times [2024-11-13 15:35:03,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:35:03,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [468136556] [2024-11-13 15:35:03,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:35:03,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:35:03,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:35:03,725 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:35:03,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-11-13 15:35:03,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:35:03,781 INFO L255 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-13 15:35:03,782 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:35:03,932 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-13 15:35:03,932 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 15:35:03,932 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:35:03,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468136556] [2024-11-13 15:35:03,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468136556] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:35:03,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 15:35:03,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-11-13 15:35:03,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415644684] [2024-11-13 15:35:03,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:35:03,933 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-13 15:35:03,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:35:03,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-13 15:35:03,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2024-11-13 15:35:03,933 INFO L87 Difference]: Start difference. First operand 192 states and 255 transitions. Second operand has 10 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-13 15:35:04,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:35:04,142 INFO L93 Difference]: Finished difference Result 255 states and 327 transitions. [2024-11-13 15:35:04,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-13 15:35:04,143 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 50 [2024-11-13 15:35:04,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:35:04,144 INFO L225 Difference]: With dead ends: 255 [2024-11-13 15:35:04,144 INFO L226 Difference]: Without dead ends: 195 [2024-11-13 15:35:04,145 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2024-11-13 15:35:04,145 INFO L432 NwaCegarLoop]: 62 mSDtfsCounter, 34 mSDsluCounter, 485 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 547 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 15:35:04,145 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 547 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 15:35:04,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2024-11-13 15:35:04,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 187. [2024-11-13 15:35:04,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 138 states have (on average 1.1521739130434783) internal successors, (159), 147 states have internal predecessors, (159), 28 states have call successors, (28), 12 states have call predecessors, (28), 20 states have return successors, (61), 27 states have call predecessors, (61), 27 states have call successors, (61) [2024-11-13 15:35:04,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 248 transitions. [2024-11-13 15:35:04,187 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 248 transitions. Word has length 50 [2024-11-13 15:35:04,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:35:04,187 INFO L471 AbstractCegarLoop]: Abstraction has 187 states and 248 transitions. [2024-11-13 15:35:04,187 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-13 15:35:04,187 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 248 transitions. [2024-11-13 15:35:04,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-13 15:35:04,189 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:35:04,189 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:35:04,211 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2024-11-13 15:35:04,389 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:35:04,389 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:35:04,390 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:35:04,390 INFO L85 PathProgramCache]: Analyzing trace with hash 322606621, now seen corresponding path program 1 times [2024-11-13 15:35:04,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:35:04,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [444491211] [2024-11-13 15:35:04,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:35:04,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:35:04,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:35:04,392 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:35:04,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-11-13 15:35:04,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:35:04,447 INFO L255 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-13 15:35:04,448 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:35:14,585 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-13 15:35:14,585 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:35:18,896 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:35:18,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444491211] [2024-11-13 15:35:18,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444491211] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:35:18,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [974043170] [2024-11-13 15:35:18,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:35:18,897 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-13 15:35:18,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/cvc4 [2024-11-13 15:35:18,899 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-13 15:35:18,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2024-11-13 15:35:19,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:35:19,012 INFO L255 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-13 15:35:19,013 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:35:31,223 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-13 15:35:31,224 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 15:35:31,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [974043170] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:35:31,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-13 15:35:31,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11] total 12 [2024-11-13 15:35:31,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469217675] [2024-11-13 15:35:31,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:35:31,224 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-13 15:35:31,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:35:31,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-13 15:35:31,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=236, Unknown=4, NotChecked=0, Total=306 [2024-11-13 15:35:31,225 INFO L87 Difference]: Start difference. First operand 187 states and 248 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-13 15:35:35,242 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-13 15:35:39,268 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-13 15:35:43,277 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-13 15:35:47,284 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-13 15:35:51,298 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-13 15:35:55,435 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-13 15:35:59,485 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-13 15:35:59,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:35:59,754 INFO L93 Difference]: Finished difference Result 206 states and 272 transitions. [2024-11-13 15:35:59,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-13 15:35:59,755 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 50 [2024-11-13 15:35:59,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:35:59,757 INFO L225 Difference]: With dead ends: 206 [2024-11-13 15:35:59,757 INFO L226 Difference]: Without dead ends: 202 [2024-11-13 15:35:59,758 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 91 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 26.4s TimeCoverageRelationStatistics Valid=73, Invalid=265, Unknown=4, NotChecked=0, Total=342 [2024-11-13 15:35:59,758 INFO L432 NwaCegarLoop]: 65 mSDtfsCounter, 8 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 0 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 363 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 28.5s IncrementalHoareTripleChecker+Time [2024-11-13 15:35:59,758 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 363 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 70 Invalid, 7 Unknown, 0 Unchecked, 28.5s Time] [2024-11-13 15:35:59,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2024-11-13 15:35:59,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 189. [2024-11-13 15:35:59,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 140 states have (on average 1.1428571428571428) internal successors, (160), 148 states have internal predecessors, (160), 28 states have call successors, (28), 13 states have call predecessors, (28), 20 states have return successors, (61), 27 states have call predecessors, (61), 27 states have call successors, (61) [2024-11-13 15:35:59,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 249 transitions. [2024-11-13 15:35:59,791 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 249 transitions. Word has length 50 [2024-11-13 15:35:59,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:35:59,791 INFO L471 AbstractCegarLoop]: Abstraction has 189 states and 249 transitions. [2024-11-13 15:35:59,791 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-13 15:35:59,791 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 249 transitions. [2024-11-13 15:35:59,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-13 15:35:59,792 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:35:59,793 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:35:59,846 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2024-11-13 15:35:59,995 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/cvc4 --incremental --print-success --lang smt (32)] Ended with exit code 0 [2024-11-13 15:36:00,194 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/cvc4 --incremental --print-success --lang smt [2024-11-13 15:36:00,194 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:36:00,194 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:36:00,194 INFO L85 PathProgramCache]: Analyzing trace with hash -835336532, now seen corresponding path program 1 times [2024-11-13 15:36:00,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:36:00,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1714496128] [2024-11-13 15:36:00,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:36:00,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:36:00,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:36:00,196 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:36:00,197 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-11-13 15:36:00,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:36:00,263 INFO L255 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-13 15:36:00,264 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:36:00,382 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-13 15:36:00,382 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 15:36:00,382 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:36:00,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714496128] [2024-11-13 15:36:00,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714496128] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:36:00,383 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 15:36:00,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-13 15:36:00,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156418073] [2024-11-13 15:36:00,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:36:00,383 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-13 15:36:00,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:36:00,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-13 15:36:00,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-11-13 15:36:00,384 INFO L87 Difference]: Start difference. First operand 189 states and 249 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-13 15:36:00,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:36:00,613 INFO L93 Difference]: Finished difference Result 225 states and 310 transitions. [2024-11-13 15:36:00,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-13 15:36:00,613 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 54 [2024-11-13 15:36:00,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:36:00,615 INFO L225 Difference]: With dead ends: 225 [2024-11-13 15:36:00,615 INFO L226 Difference]: Without dead ends: 216 [2024-11-13 15:36:00,616 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-11-13 15:36:00,616 INFO L432 NwaCegarLoop]: 64 mSDtfsCounter, 17 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 486 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-13 15:36:00,616 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 486 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-13 15:36:00,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2024-11-13 15:36:00,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 192. [2024-11-13 15:36:00,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 142 states have (on average 1.1408450704225352) internal successors, (162), 151 states have internal predecessors, (162), 28 states have call successors, (28), 13 states have call predecessors, (28), 21 states have return successors, (66), 27 states have call predecessors, (66), 27 states have call successors, (66) [2024-11-13 15:36:00,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 256 transitions. [2024-11-13 15:36:00,663 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 256 transitions. Word has length 54 [2024-11-13 15:36:00,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:36:00,664 INFO L471 AbstractCegarLoop]: Abstraction has 192 states and 256 transitions. [2024-11-13 15:36:00,664 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-13 15:36:00,664 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 256 transitions. [2024-11-13 15:36:00,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-13 15:36:00,666 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:36:00,666 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:36:00,689 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2024-11-13 15:36:00,866 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:36:00,867 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:36:00,867 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:36:00,867 INFO L85 PathProgramCache]: Analyzing trace with hash -977552408, now seen corresponding path program 1 times [2024-11-13 15:36:00,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:36:00,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [35083612] [2024-11-13 15:36:00,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:36:00,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:36:00,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:36:00,870 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:36:00,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-11-13 15:36:00,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:36:00,951 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-13 15:36:00,953 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:36:01,061 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-13 15:36:01,061 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:36:01,247 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-13 15:36:01,247 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:36:01,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35083612] [2024-11-13 15:36:01,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35083612] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:36:01,247 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 15:36:01,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2024-11-13 15:36:01,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553851242] [2024-11-13 15:36:01,247 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 15:36:01,248 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-13 15:36:01,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:36:01,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-13 15:36:01,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-11-13 15:36:01,249 INFO L87 Difference]: Start difference. First operand 192 states and 256 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-13 15:36:01,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:36:01,584 INFO L93 Difference]: Finished difference Result 229 states and 324 transitions. [2024-11-13 15:36:01,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-13 15:36:01,585 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 54 [2024-11-13 15:36:01,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:36:01,587 INFO L225 Difference]: With dead ends: 229 [2024-11-13 15:36:01,587 INFO L226 Difference]: Without dead ends: 211 [2024-11-13 15:36:01,587 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2024-11-13 15:36:01,588 INFO L432 NwaCegarLoop]: 71 mSDtfsCounter, 53 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 421 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-13 15:36:01,588 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 421 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-13 15:36:01,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2024-11-13 15:36:01,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 192. [2024-11-13 15:36:01,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 142 states have (on average 1.1338028169014085) internal successors, (161), 151 states have internal predecessors, (161), 28 states have call successors, (28), 13 states have call predecessors, (28), 21 states have return successors, (65), 27 states have call predecessors, (65), 27 states have call successors, (65) [2024-11-13 15:36:01,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 254 transitions. [2024-11-13 15:36:01,627 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 254 transitions. Word has length 54 [2024-11-13 15:36:01,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:36:01,627 INFO L471 AbstractCegarLoop]: Abstraction has 192 states and 254 transitions. [2024-11-13 15:36:01,627 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-13 15:36:01,627 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 254 transitions. [2024-11-13 15:36:01,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-11-13 15:36:01,629 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:36:01,629 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:36:01,653 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2024-11-13 15:36:01,829 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:36:01,830 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:36:01,830 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:36:01,830 INFO L85 PathProgramCache]: Analyzing trace with hash 427498269, now seen corresponding path program 1 times [2024-11-13 15:36:01,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:36:01,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1561434815] [2024-11-13 15:36:01,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:36:01,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:36:01,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:36:01,832 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:36:01,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-11-13 15:36:01,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:36:01,911 INFO L255 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-13 15:36:01,912 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:36:02,161 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-13 15:36:02,162 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:36:02,662 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-13 15:36:02,662 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:36:02,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561434815] [2024-11-13 15:36:02,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561434815] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:36:02,662 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 15:36:02,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2024-11-13 15:36:02,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712057093] [2024-11-13 15:36:02,662 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 15:36:02,663 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-13 15:36:02,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:36:02,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-13 15:36:02,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2024-11-13 15:36:02,664 INFO L87 Difference]: Start difference. First operand 192 states and 254 transitions. Second operand has 18 states, 18 states have (on average 3.0) internal successors, (54), 16 states have internal predecessors, (54), 7 states have call successors, (10), 2 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 6 states have call successors, (10) [2024-11-13 15:36:03,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:36:03,033 INFO L93 Difference]: Finished difference Result 232 states and 318 transitions. [2024-11-13 15:36:03,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-13 15:36:03,034 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 16 states have internal predecessors, (54), 7 states have call successors, (10), 2 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 6 states have call successors, (10) Word has length 63 [2024-11-13 15:36:03,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:36:03,036 INFO L225 Difference]: With dead ends: 232 [2024-11-13 15:36:03,036 INFO L226 Difference]: Without dead ends: 223 [2024-11-13 15:36:03,036 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 107 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2024-11-13 15:36:03,037 INFO L432 NwaCegarLoop]: 82 mSDtfsCounter, 27 mSDsluCounter, 698 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 780 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-13 15:36:03,038 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 780 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-13 15:36:03,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2024-11-13 15:36:03,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 208. [2024-11-13 15:36:03,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 152 states have (on average 1.138157894736842) internal successors, (173), 165 states have internal predecessors, (173), 31 states have call successors, (31), 13 states have call predecessors, (31), 24 states have return successors, (88), 29 states have call predecessors, (88), 30 states have call successors, (88) [2024-11-13 15:36:03,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 292 transitions. [2024-11-13 15:36:03,098 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 292 transitions. Word has length 63 [2024-11-13 15:36:03,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:36:03,098 INFO L471 AbstractCegarLoop]: Abstraction has 208 states and 292 transitions. [2024-11-13 15:36:03,098 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 16 states have internal predecessors, (54), 7 states have call successors, (10), 2 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 6 states have call successors, (10) [2024-11-13 15:36:03,099 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 292 transitions. [2024-11-13 15:36:03,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-11-13 15:36:03,101 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:36:03,101 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:36:03,125 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2024-11-13 15:36:03,302 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:36:03,302 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:36:03,302 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:36:03,303 INFO L85 PathProgramCache]: Analyzing trace with hash 1934498393, now seen corresponding path program 1 times [2024-11-13 15:36:03,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:36:03,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [485116456] [2024-11-13 15:36:03,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:36:03,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:36:03,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:36:03,305 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:36:03,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-11-13 15:36:03,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:36:03,374 INFO L255 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-13 15:36:03,376 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:36:03,509 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-13 15:36:03,510 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:36:03,778 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-13 15:36:03,779 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:36:03,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485116456] [2024-11-13 15:36:03,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485116456] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:36:03,779 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 15:36:03,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2024-11-13 15:36:03,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104815336] [2024-11-13 15:36:03,779 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 15:36:03,779 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-13 15:36:03,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:36:03,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-13 15:36:03,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-11-13 15:36:03,780 INFO L87 Difference]: Start difference. First operand 208 states and 292 transitions. Second operand has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 11 states have internal predecessors, (45), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-13 15:36:04,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:36:04,055 INFO L93 Difference]: Finished difference Result 226 states and 315 transitions. [2024-11-13 15:36:04,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-13 15:36:04,056 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 11 states have internal predecessors, (45), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 63 [2024-11-13 15:36:04,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:36:04,058 INFO L225 Difference]: With dead ends: 226 [2024-11-13 15:36:04,058 INFO L226 Difference]: Without dead ends: 208 [2024-11-13 15:36:04,059 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 113 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2024-11-13 15:36:04,060 INFO L432 NwaCegarLoop]: 71 mSDtfsCounter, 23 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-13 15:36:04,060 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 375 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-13 15:36:04,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2024-11-13 15:36:04,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 192. [2024-11-13 15:36:04,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 142 states have (on average 1.1267605633802817) internal successors, (160), 151 states have internal predecessors, (160), 28 states have call successors, (28), 13 states have call predecessors, (28), 21 states have return successors, (64), 27 states have call predecessors, (64), 27 states have call successors, (64) [2024-11-13 15:36:04,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 252 transitions. [2024-11-13 15:36:04,098 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 252 transitions. Word has length 63 [2024-11-13 15:36:04,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:36:04,099 INFO L471 AbstractCegarLoop]: Abstraction has 192 states and 252 transitions. [2024-11-13 15:36:04,099 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 11 states have internal predecessors, (45), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-13 15:36:04,099 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 252 transitions. [2024-11-13 15:36:04,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-11-13 15:36:04,101 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:36:04,101 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:36:04,126 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2024-11-13 15:36:04,301 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:36:04,302 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:36:04,302 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:36:04,303 INFO L85 PathProgramCache]: Analyzing trace with hash 623551947, now seen corresponding path program 1 times [2024-11-13 15:36:04,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:36:04,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [143298505] [2024-11-13 15:36:04,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:36:04,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:36:04,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:36:04,306 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:36:04,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-11-13 15:36:04,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:36:04,397 INFO L255 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-13 15:36:04,398 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:36:04,582 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-13 15:36:04,583 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:36:05,002 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-13 15:36:05,003 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:36:05,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143298505] [2024-11-13 15:36:05,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143298505] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:36:05,003 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 15:36:05,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2024-11-13 15:36:05,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786315924] [2024-11-13 15:36:05,003 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 15:36:05,003 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-13 15:36:05,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:36:05,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-13 15:36:05,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2024-11-13 15:36:05,004 INFO L87 Difference]: Start difference. First operand 192 states and 252 transitions. Second operand has 20 states, 18 states have (on average 2.888888888888889) internal successors, (52), 18 states have internal predecessors, (52), 6 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2024-11-13 15:36:06,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:36:06,523 INFO L93 Difference]: Finished difference Result 229 states and 310 transitions. [2024-11-13 15:36:06,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-13 15:36:06,524 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 2.888888888888889) internal successors, (52), 18 states have internal predecessors, (52), 6 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) Word has length 63 [2024-11-13 15:36:06,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:36:06,526 INFO L225 Difference]: With dead ends: 229 [2024-11-13 15:36:06,526 INFO L226 Difference]: Without dead ends: 220 [2024-11-13 15:36:06,528 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=171, Invalid=1089, Unknown=0, NotChecked=0, Total=1260 [2024-11-13 15:36:06,532 INFO L432 NwaCegarLoop]: 74 mSDtfsCounter, 116 mSDsluCounter, 773 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 847 SdHoareTripleChecker+Invalid, 419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-13 15:36:06,532 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 847 Invalid, 419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 384 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-13 15:36:06,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2024-11-13 15:36:06,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 192. [2024-11-13 15:36:06,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 142 states have (on average 1.1267605633802817) internal successors, (160), 151 states have internal predecessors, (160), 28 states have call successors, (28), 13 states have call predecessors, (28), 21 states have return successors, (63), 27 states have call predecessors, (63), 27 states have call successors, (63) [2024-11-13 15:36:06,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 251 transitions. [2024-11-13 15:36:06,590 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 251 transitions. Word has length 63 [2024-11-13 15:36:06,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:36:06,592 INFO L471 AbstractCegarLoop]: Abstraction has 192 states and 251 transitions. [2024-11-13 15:36:06,592 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 2.888888888888889) internal successors, (52), 18 states have internal predecessors, (52), 6 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2024-11-13 15:36:06,592 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 251 transitions. [2024-11-13 15:36:06,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-11-13 15:36:06,594 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:36:06,595 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:36:06,619 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2024-11-13 15:36:06,795 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:36:06,796 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:36:06,796 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:36:06,796 INFO L85 PathProgramCache]: Analyzing trace with hash -910563992, now seen corresponding path program 1 times [2024-11-13 15:36:06,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:36:06,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1132535870] [2024-11-13 15:36:06,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:36:06,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:36:06,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:36:06,798 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:36:06,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2024-11-13 15:36:06,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:36:06,878 INFO L255 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-13 15:36:06,880 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:36:07,001 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-13 15:36:07,001 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:36:07,217 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-13 15:36:07,217 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:36:07,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132535870] [2024-11-13 15:36:07,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132535870] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:36:07,217 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 15:36:07,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2024-11-13 15:36:07,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426935065] [2024-11-13 15:36:07,218 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 15:36:07,218 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-13 15:36:07,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:36:07,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-13 15:36:07,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-11-13 15:36:07,219 INFO L87 Difference]: Start difference. First operand 192 states and 251 transitions. Second operand has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 11 states have internal predecessors, (49), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-13 15:36:07,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:36:07,490 INFO L93 Difference]: Finished difference Result 219 states and 298 transitions. [2024-11-13 15:36:07,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-13 15:36:07,491 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 11 states have internal predecessors, (49), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 65 [2024-11-13 15:36:07,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:36:07,493 INFO L225 Difference]: With dead ends: 219 [2024-11-13 15:36:07,493 INFO L226 Difference]: Without dead ends: 205 [2024-11-13 15:36:07,493 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2024-11-13 15:36:07,494 INFO L432 NwaCegarLoop]: 65 mSDtfsCounter, 49 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 15:36:07,494 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 345 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 15:36:07,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2024-11-13 15:36:07,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 189. [2024-11-13 15:36:07,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 140 states have (on average 1.1214285714285714) internal successors, (157), 148 states have internal predecessors, (157), 28 states have call successors, (28), 13 states have call predecessors, (28), 20 states have return successors, (60), 27 states have call predecessors, (60), 27 states have call successors, (60) [2024-11-13 15:36:07,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 245 transitions. [2024-11-13 15:36:07,534 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 245 transitions. Word has length 65 [2024-11-13 15:36:07,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:36:07,534 INFO L471 AbstractCegarLoop]: Abstraction has 189 states and 245 transitions. [2024-11-13 15:36:07,534 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 11 states have internal predecessors, (49), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-13 15:36:07,535 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 245 transitions. [2024-11-13 15:36:07,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-11-13 15:36:07,536 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:36:07,536 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:36:07,560 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2024-11-13 15:36:07,737 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:36:07,737 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:36:07,737 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:36:07,738 INFO L85 PathProgramCache]: Analyzing trace with hash 1938711906, now seen corresponding path program 1 times [2024-11-13 15:36:07,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:36:07,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [463501007] [2024-11-13 15:36:07,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:36:07,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:36:07,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:36:07,740 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:36:07,741 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2024-11-13 15:36:07,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:36:07,809 INFO L255 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-13 15:36:07,810 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:36:08,002 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-13 15:36:08,002 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:36:08,347 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-13 15:36:08,347 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:36:08,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463501007] [2024-11-13 15:36:08,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463501007] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:36:08,347 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 15:36:08,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2024-11-13 15:36:08,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951210403] [2024-11-13 15:36:08,347 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 15:36:08,348 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-13 15:36:08,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:36:08,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-13 15:36:08,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2024-11-13 15:36:08,349 INFO L87 Difference]: Start difference. First operand 189 states and 245 transitions. Second operand has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 13 states have internal predecessors, (58), 6 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2024-11-13 15:36:08,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:36:08,773 INFO L93 Difference]: Finished difference Result 229 states and 319 transitions. [2024-11-13 15:36:08,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-13 15:36:08,774 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 13 states have internal predecessors, (58), 6 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) Word has length 65 [2024-11-13 15:36:08,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:36:08,776 INFO L225 Difference]: With dead ends: 229 [2024-11-13 15:36:08,776 INFO L226 Difference]: Without dead ends: 220 [2024-11-13 15:36:08,777 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2024-11-13 15:36:08,777 INFO L432 NwaCegarLoop]: 75 mSDtfsCounter, 36 mSDsluCounter, 624 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 699 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-13 15:36:08,778 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 699 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-13 15:36:08,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2024-11-13 15:36:08,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 201. [2024-11-13 15:36:08,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 149 states have (on average 1.1275167785234899) internal successors, (168), 159 states have internal predecessors, (168), 29 states have call successors, (29), 13 states have call predecessors, (29), 22 states have return successors, (75), 28 states have call predecessors, (75), 28 states have call successors, (75) [2024-11-13 15:36:08,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 272 transitions. [2024-11-13 15:36:08,828 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 272 transitions. Word has length 65 [2024-11-13 15:36:08,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:36:08,828 INFO L471 AbstractCegarLoop]: Abstraction has 201 states and 272 transitions. [2024-11-13 15:36:08,828 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 13 states have internal predecessors, (58), 6 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2024-11-13 15:36:08,829 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 272 transitions. [2024-11-13 15:36:08,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-11-13 15:36:08,831 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:36:08,831 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:36:08,857 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2024-11-13 15:36:09,033 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:36:09,033 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:36:09,034 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:36:09,034 INFO L85 PathProgramCache]: Analyzing trace with hash 1663952292, now seen corresponding path program 2 times [2024-11-13 15:36:09,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:36:09,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1887183215] [2024-11-13 15:36:09,035 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 15:36:09,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:36:09,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:36:09,037 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:36:09,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2024-11-13 15:36:09,142 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 15:36:09,142 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 15:36:09,147 INFO L255 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-13 15:36:09,148 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:36:09,312 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-13 15:36:09,312 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:36:09,556 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-13 15:36:09,557 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:36:09,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887183215] [2024-11-13 15:36:09,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887183215] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:36:09,557 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 15:36:09,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2024-11-13 15:36:09,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985058557] [2024-11-13 15:36:09,558 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 15:36:09,558 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-13 15:36:09,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:36:09,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-13 15:36:09,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-11-13 15:36:09,559 INFO L87 Difference]: Start difference. First operand 201 states and 272 transitions. Second operand has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 11 states have internal predecessors, (49), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-13 15:36:09,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:36:09,830 INFO L93 Difference]: Finished difference Result 218 states and 300 transitions. [2024-11-13 15:36:09,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-13 15:36:09,832 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 11 states have internal predecessors, (49), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 65 [2024-11-13 15:36:09,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:36:09,834 INFO L225 Difference]: With dead ends: 218 [2024-11-13 15:36:09,834 INFO L226 Difference]: Without dead ends: 204 [2024-11-13 15:36:09,834 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2024-11-13 15:36:09,835 INFO L432 NwaCegarLoop]: 69 mSDtfsCounter, 22 mSDsluCounter, 449 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 518 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-13 15:36:09,835 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 518 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-13 15:36:09,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2024-11-13 15:36:09,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 184. [2024-11-13 15:36:09,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 137 states have (on average 1.1167883211678833) internal successors, (153), 144 states have internal predecessors, (153), 27 states have call successors, (27), 13 states have call predecessors, (27), 19 states have return successors, (53), 26 states have call predecessors, (53), 26 states have call successors, (53) [2024-11-13 15:36:09,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 233 transitions. [2024-11-13 15:36:09,875 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 233 transitions. Word has length 65 [2024-11-13 15:36:09,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:36:09,876 INFO L471 AbstractCegarLoop]: Abstraction has 184 states and 233 transitions. [2024-11-13 15:36:09,876 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 11 states have internal predecessors, (49), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-13 15:36:09,876 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 233 transitions. [2024-11-13 15:36:09,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-11-13 15:36:09,877 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:36:09,877 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:36:09,900 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2024-11-13 15:36:10,078 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:36:10,078 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:36:10,078 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:36:10,078 INFO L85 PathProgramCache]: Analyzing trace with hash -1710566698, now seen corresponding path program 1 times [2024-11-13 15:36:10,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:36:10,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1909390945] [2024-11-13 15:36:10,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:36:10,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:36:10,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:36:10,081 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:36:10,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2024-11-13 15:36:10,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:36:10,156 INFO L255 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-13 15:36:10,157 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:36:10,413 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-13 15:36:10,414 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:36:10,783 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-13 15:36:10,783 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:36:10,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909390945] [2024-11-13 15:36:10,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909390945] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:36:10,783 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 15:36:10,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2024-11-13 15:36:10,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339370047] [2024-11-13 15:36:10,784 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 15:36:10,784 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-13 15:36:10,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:36:10,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-13 15:36:10,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2024-11-13 15:36:10,785 INFO L87 Difference]: Start difference. First operand 184 states and 233 transitions. Second operand has 16 states, 16 states have (on average 3.5) internal successors, (56), 14 states have internal predecessors, (56), 5 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) [2024-11-13 15:36:11,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:36:11,405 INFO L93 Difference]: Finished difference Result 203 states and 255 transitions. [2024-11-13 15:36:11,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-13 15:36:11,406 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 14 states have internal predecessors, (56), 5 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) Word has length 72 [2024-11-13 15:36:11,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:36:11,407 INFO L225 Difference]: With dead ends: 203 [2024-11-13 15:36:11,407 INFO L226 Difference]: Without dead ends: 191 [2024-11-13 15:36:11,408 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 126 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2024-11-13 15:36:11,408 INFO L432 NwaCegarLoop]: 68 mSDtfsCounter, 18 mSDsluCounter, 727 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 795 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-13 15:36:11,408 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 795 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-13 15:36:11,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2024-11-13 15:36:11,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 181. [2024-11-13 15:36:11,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 135 states have (on average 1.1111111111111112) internal successors, (150), 141 states have internal predecessors, (150), 27 states have call successors, (27), 13 states have call predecessors, (27), 18 states have return successors, (50), 26 states have call predecessors, (50), 26 states have call successors, (50) [2024-11-13 15:36:11,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 227 transitions. [2024-11-13 15:36:11,448 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 227 transitions. Word has length 72 [2024-11-13 15:36:11,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:36:11,448 INFO L471 AbstractCegarLoop]: Abstraction has 181 states and 227 transitions. [2024-11-13 15:36:11,448 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 14 states have internal predecessors, (56), 5 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) [2024-11-13 15:36:11,449 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 227 transitions. [2024-11-13 15:36:11,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-11-13 15:36:11,450 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:36:11,450 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:36:11,474 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2024-11-13 15:36:11,651 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:36:11,651 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:36:11,651 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:36:11,651 INFO L85 PathProgramCache]: Analyzing trace with hash -1299303138, now seen corresponding path program 1 times [2024-11-13 15:36:11,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:36:11,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1388972165] [2024-11-13 15:36:11,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:36:11,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:36:11,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:36:11,656 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:36:11,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2024-11-13 15:36:11,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:36:11,734 INFO L255 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-13 15:36:11,735 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:36:11,852 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-13 15:36:11,853 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 15:36:11,853 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:36:11,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388972165] [2024-11-13 15:36:11,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388972165] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:36:11,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 15:36:11,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-13 15:36:11,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490257429] [2024-11-13 15:36:11,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:36:11,853 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-13 15:36:11,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:36:11,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-13 15:36:11,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-11-13 15:36:11,854 INFO L87 Difference]: Start difference. First operand 181 states and 227 transitions. Second operand has 8 states, 8 states have (on average 5.875) internal successors, (47), 7 states have internal predecessors, (47), 4 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-13 15:36:12,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:36:12,059 INFO L93 Difference]: Finished difference Result 214 states and 276 transitions. [2024-11-13 15:36:12,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-13 15:36:12,060 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 7 states have internal predecessors, (47), 4 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 72 [2024-11-13 15:36:12,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:36:12,061 INFO L225 Difference]: With dead ends: 214 [2024-11-13 15:36:12,061 INFO L226 Difference]: Without dead ends: 205 [2024-11-13 15:36:12,062 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-11-13 15:36:12,063 INFO L432 NwaCegarLoop]: 77 mSDtfsCounter, 23 mSDsluCounter, 413 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 490 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-13 15:36:12,063 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 490 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-13 15:36:12,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2024-11-13 15:36:12,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 192. [2024-11-13 15:36:12,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 142 states have (on average 1.119718309859155) internal successors, (159), 151 states have internal predecessors, (159), 29 states have call successors, (29), 13 states have call predecessors, (29), 20 states have return successors, (61), 27 states have call predecessors, (61), 28 states have call successors, (61) [2024-11-13 15:36:12,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 249 transitions. [2024-11-13 15:36:12,107 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 249 transitions. Word has length 72 [2024-11-13 15:36:12,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:36:12,107 INFO L471 AbstractCegarLoop]: Abstraction has 192 states and 249 transitions. [2024-11-13 15:36:12,108 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 7 states have internal predecessors, (47), 4 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-13 15:36:12,108 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 249 transitions. [2024-11-13 15:36:12,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-11-13 15:36:12,109 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:36:12,110 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:36:12,134 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2024-11-13 15:36:12,310 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:36:12,310 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:36:12,311 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:36:12,311 INFO L85 PathProgramCache]: Analyzing trace with hash -1789053158, now seen corresponding path program 1 times [2024-11-13 15:36:12,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:36:12,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1886027500] [2024-11-13 15:36:12,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:36:12,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:36:12,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:36:12,313 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:36:12,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2024-11-13 15:36:12,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:36:12,398 INFO L255 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-13 15:36:12,400 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:36:13,145 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-11-13 15:36:13,146 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 15:36:13,146 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:36:13,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886027500] [2024-11-13 15:36:13,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886027500] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:36:13,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 15:36:13,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-11-13 15:36:13,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499442821] [2024-11-13 15:36:13,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:36:13,146 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-13 15:36:13,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:36:13,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-13 15:36:13,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2024-11-13 15:36:13,147 INFO L87 Difference]: Start difference. First operand 192 states and 249 transitions. Second operand has 11 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-13 15:36:13,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:36:13,645 INFO L93 Difference]: Finished difference Result 213 states and 272 transitions. [2024-11-13 15:36:13,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-13 15:36:13,646 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 72 [2024-11-13 15:36:13,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:36:13,648 INFO L225 Difference]: With dead ends: 213 [2024-11-13 15:36:13,648 INFO L226 Difference]: Without dead ends: 204 [2024-11-13 15:36:13,648 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2024-11-13 15:36:13,649 INFO L432 NwaCegarLoop]: 67 mSDtfsCounter, 5 mSDsluCounter, 484 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 551 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-13 15:36:13,649 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 551 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-13 15:36:13,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2024-11-13 15:36:13,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 192. [2024-11-13 15:36:13,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 142 states have (on average 1.119718309859155) internal successors, (159), 151 states have internal predecessors, (159), 29 states have call successors, (29), 13 states have call predecessors, (29), 20 states have return successors, (60), 27 states have call predecessors, (60), 28 states have call successors, (60) [2024-11-13 15:36:13,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 248 transitions. [2024-11-13 15:36:13,688 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 248 transitions. Word has length 72 [2024-11-13 15:36:13,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:36:13,688 INFO L471 AbstractCegarLoop]: Abstraction has 192 states and 248 transitions. [2024-11-13 15:36:13,688 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-13 15:36:13,688 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 248 transitions. [2024-11-13 15:36:13,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-11-13 15:36:13,690 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:36:13,690 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:36:13,714 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2024-11-13 15:36:13,891 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:36:13,891 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:36:13,891 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:36:13,891 INFO L85 PathProgramCache]: Analyzing trace with hash 1614982799, now seen corresponding path program 1 times [2024-11-13 15:36:13,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:36:13,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1976278268] [2024-11-13 15:36:13,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:36:13,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:36:13,892 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:36:13,894 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:36:13,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2024-11-13 15:36:13,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:36:13,972 INFO L255 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-13 15:36:13,974 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:36:14,905 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-13 15:36:14,905 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:36:16,361 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-13 15:36:16,361 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:36:16,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976278268] [2024-11-13 15:36:16,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976278268] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:36:16,362 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 15:36:16,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2024-11-13 15:36:16,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720435432] [2024-11-13 15:36:16,362 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 15:36:16,362 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-13 15:36:16,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:36:16,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-13 15:36:16,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2024-11-13 15:36:16,363 INFO L87 Difference]: Start difference. First operand 192 states and 248 transitions. Second operand has 23 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 23 states have internal predecessors, (62), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2024-11-13 15:36:18,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:36:18,698 INFO L93 Difference]: Finished difference Result 219 states and 278 transitions. [2024-11-13 15:36:18,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-13 15:36:18,699 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 23 states have internal predecessors, (62), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) Word has length 72 [2024-11-13 15:36:18,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:36:18,700 INFO L225 Difference]: With dead ends: 219 [2024-11-13 15:36:18,700 INFO L226 Difference]: Without dead ends: 210 [2024-11-13 15:36:18,701 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=171, Invalid=821, Unknown=0, NotChecked=0, Total=992 [2024-11-13 15:36:18,701 INFO L432 NwaCegarLoop]: 66 mSDtfsCounter, 38 mSDsluCounter, 895 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 961 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-11-13 15:36:18,701 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 961 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 311 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-11-13 15:36:18,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2024-11-13 15:36:18,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 192. [2024-11-13 15:36:18,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 142 states have (on average 1.119718309859155) internal successors, (159), 151 states have internal predecessors, (159), 29 states have call successors, (29), 13 states have call predecessors, (29), 20 states have return successors, (59), 27 states have call predecessors, (59), 28 states have call successors, (59) [2024-11-13 15:36:18,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 247 transitions. [2024-11-13 15:36:18,739 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 247 transitions. Word has length 72 [2024-11-13 15:36:18,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:36:18,739 INFO L471 AbstractCegarLoop]: Abstraction has 192 states and 247 transitions. [2024-11-13 15:36:18,740 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 23 states have internal predecessors, (62), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2024-11-13 15:36:18,740 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 247 transitions. [2024-11-13 15:36:18,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-11-13 15:36:18,742 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:36:18,742 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:36:18,771 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2024-11-13 15:36:18,942 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:36:18,942 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:36:18,943 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:36:18,943 INFO L85 PathProgramCache]: Analyzing trace with hash 1396128081, now seen corresponding path program 1 times [2024-11-13 15:36:18,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:36:18,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1888288544] [2024-11-13 15:36:18,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:36:18,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:36:18,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:36:18,945 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:36:18,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2024-11-13 15:36:19,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:36:19,024 INFO L255 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-13 15:36:19,030 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:36:20,648 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-13 15:36:20,648 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:36:24,552 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-13 15:36:24,552 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:36:24,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888288544] [2024-11-13 15:36:24,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888288544] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:36:24,552 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 15:36:24,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 31 [2024-11-13 15:36:24,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503944133] [2024-11-13 15:36:24,553 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 15:36:24,553 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-13 15:36:24,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:36:24,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-13 15:36:24,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=807, Unknown=0, NotChecked=0, Total=930 [2024-11-13 15:36:24,554 INFO L87 Difference]: Start difference. First operand 192 states and 247 transitions. Second operand has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 31 states have internal predecessors, (61), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2024-11-13 15:36:32,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:36:32,009 INFO L93 Difference]: Finished difference Result 260 states and 333 transitions. [2024-11-13 15:36:32,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-11-13 15:36:32,010 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 31 states have internal predecessors, (61), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) Word has length 72 [2024-11-13 15:36:32,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:36:32,012 INFO L225 Difference]: With dead ends: 260 [2024-11-13 15:36:32,012 INFO L226 Difference]: Without dead ends: 245 [2024-11-13 15:36:32,014 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=379, Invalid=2377, Unknown=0, NotChecked=0, Total=2756 [2024-11-13 15:36:32,014 INFO L432 NwaCegarLoop]: 76 mSDtfsCounter, 71 mSDsluCounter, 1092 mSDsCounter, 0 mSdLazyCounter, 913 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 1168 SdHoareTripleChecker+Invalid, 948 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 913 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2024-11-13 15:36:32,015 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 1168 Invalid, 948 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 913 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2024-11-13 15:36:32,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2024-11-13 15:36:32,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 223. [2024-11-13 15:36:32,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 165 states have (on average 1.1333333333333333) internal successors, (187), 176 states have internal predecessors, (187), 35 states have call successors, (35), 14 states have call predecessors, (35), 22 states have return successors, (69), 32 states have call predecessors, (69), 34 states have call successors, (69) [2024-11-13 15:36:32,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 291 transitions. [2024-11-13 15:36:32,077 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 291 transitions. Word has length 72 [2024-11-13 15:36:32,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:36:32,078 INFO L471 AbstractCegarLoop]: Abstraction has 223 states and 291 transitions. [2024-11-13 15:36:32,078 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 31 states have internal predecessors, (61), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2024-11-13 15:36:32,078 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 291 transitions. [2024-11-13 15:36:32,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-11-13 15:36:32,080 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:36:32,080 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:36:32,101 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2024-11-13 15:36:32,281 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:36:32,281 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:36:32,281 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:36:32,281 INFO L85 PathProgramCache]: Analyzing trace with hash -834617331, now seen corresponding path program 2 times [2024-11-13 15:36:32,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:36:32,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [475209951] [2024-11-13 15:36:32,282 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 15:36:32,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:36:32,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:36:32,284 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:36:32,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2024-11-13 15:36:32,388 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 15:36:32,388 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 15:36:32,391 INFO L255 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-13 15:36:32,393 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:36:33,459 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-13 15:36:33,460 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:36:36,196 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-13 15:36:36,196 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:36:36,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475209951] [2024-11-13 15:36:36,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475209951] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:36:36,197 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 15:36:36,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 28 [2024-11-13 15:36:36,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790363397] [2024-11-13 15:36:36,197 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 15:36:36,198 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-13 15:36:36,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:36:36,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-13 15:36:36,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=649, Unknown=0, NotChecked=0, Total=756 [2024-11-13 15:36:36,199 INFO L87 Difference]: Start difference. First operand 223 states and 291 transitions. Second operand has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2024-11-13 15:36:41,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:36:41,793 INFO L93 Difference]: Finished difference Result 296 states and 388 transitions. [2024-11-13 15:36:41,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-11-13 15:36:41,795 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) Word has length 72 [2024-11-13 15:36:41,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:36:41,798 INFO L225 Difference]: With dead ends: 296 [2024-11-13 15:36:41,798 INFO L226 Difference]: Without dead ends: 279 [2024-11-13 15:36:41,799 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=342, Invalid=2108, Unknown=0, NotChecked=0, Total=2450 [2024-11-13 15:36:41,800 INFO L432 NwaCegarLoop]: 69 mSDtfsCounter, 80 mSDsluCounter, 906 mSDsCounter, 0 mSdLazyCounter, 677 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 975 SdHoareTripleChecker+Invalid, 727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2024-11-13 15:36:41,800 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 975 Invalid, 727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 677 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2024-11-13 15:36:41,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2024-11-13 15:36:41,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 254. [2024-11-13 15:36:41,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 188 states have (on average 1.1436170212765957) internal successors, (215), 201 states have internal predecessors, (215), 41 states have call successors, (41), 15 states have call predecessors, (41), 24 states have return successors, (83), 37 states have call predecessors, (83), 40 states have call successors, (83) [2024-11-13 15:36:41,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 339 transitions. [2024-11-13 15:36:41,877 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 339 transitions. Word has length 72 [2024-11-13 15:36:41,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:36:41,877 INFO L471 AbstractCegarLoop]: Abstraction has 254 states and 339 transitions. [2024-11-13 15:36:41,877 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2024-11-13 15:36:41,877 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 339 transitions. [2024-11-13 15:36:41,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-11-13 15:36:41,879 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:36:41,879 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:36:41,905 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2024-11-13 15:36:42,080 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:36:42,080 INFO L396 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:36:42,081 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:36:42,081 INFO L85 PathProgramCache]: Analyzing trace with hash 168078755, now seen corresponding path program 1 times [2024-11-13 15:36:42,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:36:42,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [982704774] [2024-11-13 15:36:42,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:36:42,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:36:42,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:36:42,084 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:36:42,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2024-11-13 15:36:42,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:36:42,186 INFO L255 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-13 15:36:42,188 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:36:42,382 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-13 15:36:42,382 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 15:36:42,382 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:36:42,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982704774] [2024-11-13 15:36:42,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982704774] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:36:42,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 15:36:42,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-11-13 15:36:42,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047641900] [2024-11-13 15:36:42,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:36:42,383 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-13 15:36:42,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:36:42,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-13 15:36:42,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2024-11-13 15:36:42,384 INFO L87 Difference]: Start difference. First operand 254 states and 339 transitions. Second operand has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 9 states have internal predecessors, (49), 4 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-13 15:36:42,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:36:42,717 INFO L93 Difference]: Finished difference Result 273 states and 357 transitions. [2024-11-13 15:36:42,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-13 15:36:42,718 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 9 states have internal predecessors, (49), 4 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 74 [2024-11-13 15:36:42,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:36:42,720 INFO L225 Difference]: With dead ends: 273 [2024-11-13 15:36:42,720 INFO L226 Difference]: Without dead ends: 264 [2024-11-13 15:36:42,720 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2024-11-13 15:36:42,723 INFO L432 NwaCegarLoop]: 65 mSDtfsCounter, 12 mSDsluCounter, 543 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 608 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-13 15:36:42,724 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 608 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-13 15:36:42,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2024-11-13 15:36:42,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 254. [2024-11-13 15:36:42,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 188 states have (on average 1.1436170212765957) internal successors, (215), 201 states have internal predecessors, (215), 41 states have call successors, (41), 15 states have call predecessors, (41), 24 states have return successors, (82), 37 states have call predecessors, (82), 40 states have call successors, (82) [2024-11-13 15:36:42,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 338 transitions. [2024-11-13 15:36:42,811 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 338 transitions. Word has length 74 [2024-11-13 15:36:42,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:36:42,811 INFO L471 AbstractCegarLoop]: Abstraction has 254 states and 338 transitions. [2024-11-13 15:36:42,811 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 9 states have internal predecessors, (49), 4 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-13 15:36:42,811 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 338 transitions. [2024-11-13 15:36:42,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-11-13 15:36:42,813 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:36:42,813 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:36:42,838 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2024-11-13 15:36:43,014 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:36:43,014 INFO L396 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:36:43,014 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:36:43,015 INFO L85 PathProgramCache]: Analyzing trace with hash 1675078879, now seen corresponding path program 1 times [2024-11-13 15:36:43,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:36:43,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2049303459] [2024-11-13 15:36:43,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:36:43,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:36:43,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:36:43,017 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:36:43,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2024-11-13 15:36:43,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:36:43,101 INFO L255 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-13 15:36:43,102 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:36:44,012 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-13 15:36:44,013 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:36:44,408 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:36:44,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049303459] [2024-11-13 15:36:44,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049303459] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:36:44,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [385846799] [2024-11-13 15:36:44,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:36:44,408 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-13 15:36:44,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/cvc4 [2024-11-13 15:36:44,412 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-13 15:36:44,413 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/cvc4 --incremental --print-success --lang smt (49)] Waiting until timeout for monitored process [2024-11-13 15:36:44,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:36:44,567 INFO L255 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-13 15:36:44,568 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:36:45,352 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-13 15:36:45,353 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:36:46,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [385846799] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:36:46,084 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 15:36:46,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2024-11-13 15:36:46,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187747460] [2024-11-13 15:36:46,084 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 15:36:46,085 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-13 15:36:46,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:36:46,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-13 15:36:46,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2024-11-13 15:36:46,086 INFO L87 Difference]: Start difference. First operand 254 states and 338 transitions. Second operand has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 states have internal predecessors, (47), 5 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2024-11-13 15:36:47,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:36:47,963 INFO L93 Difference]: Finished difference Result 281 states and 375 transitions. [2024-11-13 15:36:47,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-13 15:36:47,964 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 states have internal predecessors, (47), 5 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) Word has length 74 [2024-11-13 15:36:47,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:36:47,966 INFO L225 Difference]: With dead ends: 281 [2024-11-13 15:36:47,966 INFO L226 Difference]: Without dead ends: 272 [2024-11-13 15:36:47,966 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 150 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2024-11-13 15:36:47,967 INFO L432 NwaCegarLoop]: 71 mSDtfsCounter, 24 mSDsluCounter, 522 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 593 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-13 15:36:47,967 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 593 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-13 15:36:47,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2024-11-13 15:36:48,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 256. [2024-11-13 15:36:48,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 189 states have (on average 1.1428571428571428) internal successors, (216), 202 states have internal predecessors, (216), 42 states have call successors, (42), 15 states have call predecessors, (42), 24 states have return successors, (88), 38 states have call predecessors, (88), 41 states have call successors, (88) [2024-11-13 15:36:48,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 346 transitions. [2024-11-13 15:36:48,062 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 346 transitions. Word has length 74 [2024-11-13 15:36:48,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:36:48,062 INFO L471 AbstractCegarLoop]: Abstraction has 256 states and 346 transitions. [2024-11-13 15:36:48,062 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 states have internal predecessors, (47), 5 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2024-11-13 15:36:48,063 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 346 transitions. [2024-11-13 15:36:48,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-11-13 15:36:48,064 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:36:48,065 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:36:48,068 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/cvc4 --incremental --print-success --lang smt (49)] Ended with exit code 0 [2024-11-13 15:36:48,280 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2024-11-13 15:36:48,465 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/cvc4 --incremental --print-success --lang smt,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:36:48,465 INFO L396 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:36:48,466 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:36:48,466 INFO L85 PathProgramCache]: Analyzing trace with hash 784147540, now seen corresponding path program 1 times [2024-11-13 15:36:48,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:36:48,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1008427772] [2024-11-13 15:36:48,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:36:48,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:36:48,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:36:48,469 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:36:48,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2024-11-13 15:36:48,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:36:48,557 INFO L255 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-13 15:36:48,558 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:36:48,613 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-13 15:36:48,613 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:36:48,692 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-13 15:36:48,692 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:36:48,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008427772] [2024-11-13 15:36:48,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008427772] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:36:48,693 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 15:36:48,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2024-11-13 15:36:48,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190997735] [2024-11-13 15:36:48,693 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 15:36:48,693 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-13 15:36:48,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:36:48,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-13 15:36:48,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-13 15:36:48,694 INFO L87 Difference]: Start difference. First operand 256 states and 346 transitions. Second operand has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 states have internal predecessors, (37), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-13 15:36:48,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:36:48,794 INFO L93 Difference]: Finished difference Result 266 states and 356 transitions. [2024-11-13 15:36:48,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-13 15:36:48,795 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 states have internal predecessors, (37), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 74 [2024-11-13 15:36:48,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:36:48,796 INFO L225 Difference]: With dead ends: 266 [2024-11-13 15:36:48,796 INFO L226 Difference]: Without dead ends: 261 [2024-11-13 15:36:48,797 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-13 15:36:48,797 INFO L432 NwaCegarLoop]: 70 mSDtfsCounter, 1 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-13 15:36:48,797 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 334 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 15:36:48,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2024-11-13 15:36:48,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 256. [2024-11-13 15:36:48,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 189 states have (on average 1.1428571428571428) internal successors, (216), 202 states have internal predecessors, (216), 42 states have call successors, (42), 15 states have call predecessors, (42), 24 states have return successors, (88), 38 states have call predecessors, (88), 41 states have call successors, (88) [2024-11-13 15:36:48,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 346 transitions. [2024-11-13 15:36:48,891 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 346 transitions. Word has length 74 [2024-11-13 15:36:48,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:36:48,892 INFO L471 AbstractCegarLoop]: Abstraction has 256 states and 346 transitions. [2024-11-13 15:36:48,892 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 states have internal predecessors, (37), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-13 15:36:48,892 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 346 transitions. [2024-11-13 15:36:48,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-11-13 15:36:48,894 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:36:48,894 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:36:48,918 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2024-11-13 15:36:49,094 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:36:49,095 INFO L396 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:36:49,095 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:36:49,095 INFO L85 PathProgramCache]: Analyzing trace with hash 1456224161, now seen corresponding path program 1 times [2024-11-13 15:36:49,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:36:49,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [140787531] [2024-11-13 15:36:49,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:36:49,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:36:49,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:36:49,097 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:36:49,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2024-11-13 15:36:49,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:36:49,195 INFO L255 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-13 15:36:49,198 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:36:50,270 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-13 15:36:50,270 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:36:53,303 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-13 15:36:53,303 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:36:53,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140787531] [2024-11-13 15:36:53,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140787531] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:36:53,303 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 15:36:53,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 28 [2024-11-13 15:36:53,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981908627] [2024-11-13 15:36:53,304 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 15:36:53,304 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-13 15:36:53,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:36:53,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-13 15:36:53,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=629, Unknown=0, NotChecked=0, Total=756 [2024-11-13 15:36:53,305 INFO L87 Difference]: Start difference. First operand 256 states and 346 transitions. Second operand has 28 states, 28 states have (on average 2.25) internal successors, (63), 28 states have internal predecessors, (63), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2024-11-13 15:36:56,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:36:56,717 INFO L93 Difference]: Finished difference Result 299 states and 395 transitions. [2024-11-13 15:36:56,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-13 15:36:56,719 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.25) internal successors, (63), 28 states have internal predecessors, (63), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) Word has length 74 [2024-11-13 15:36:56,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:36:56,720 INFO L225 Difference]: With dead ends: 299 [2024-11-13 15:36:56,720 INFO L226 Difference]: Without dead ends: 285 [2024-11-13 15:36:56,720 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=219, Invalid=1041, Unknown=0, NotChecked=0, Total=1260 [2024-11-13 15:36:56,721 INFO L432 NwaCegarLoop]: 67 mSDtfsCounter, 31 mSDsluCounter, 977 mSDsCounter, 0 mSdLazyCounter, 586 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 1044 SdHoareTripleChecker+Invalid, 600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2024-11-13 15:36:56,721 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 1044 Invalid, 600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 586 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2024-11-13 15:36:56,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2024-11-13 15:36:56,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 271. [2024-11-13 15:36:56,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 201 states have (on average 1.1393034825870647) internal successors, (229), 214 states have internal predecessors, (229), 44 states have call successors, (44), 16 states have call predecessors, (44), 25 states have return successors, (88), 40 states have call predecessors, (88), 43 states have call successors, (88) [2024-11-13 15:36:56,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 361 transitions. [2024-11-13 15:36:56,785 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 361 transitions. Word has length 74 [2024-11-13 15:36:56,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:36:56,785 INFO L471 AbstractCegarLoop]: Abstraction has 271 states and 361 transitions. [2024-11-13 15:36:56,785 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.25) internal successors, (63), 28 states have internal predecessors, (63), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2024-11-13 15:36:56,785 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 361 transitions. [2024-11-13 15:36:56,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-11-13 15:36:56,787 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:36:56,787 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:36:56,812 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2024-11-13 15:36:56,987 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:36:56,988 INFO L396 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:36:56,988 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:36:56,988 INFO L85 PathProgramCache]: Analyzing trace with hash 1251432157, now seen corresponding path program 2 times [2024-11-13 15:36:56,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:36:56,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1528699163] [2024-11-13 15:36:56,988 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 15:36:56,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:36:56,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:36:56,990 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:36:56,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2024-11-13 15:36:57,091 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 15:36:57,091 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 15:36:57,094 INFO L255 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-13 15:36:57,096 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:36:58,293 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-13 15:36:58,293 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:37:01,555 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-13 15:37:01,555 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:37:01,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528699163] [2024-11-13 15:37:01,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528699163] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:37:01,555 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 15:37:01,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 29 [2024-11-13 15:37:01,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848318282] [2024-11-13 15:37:01,555 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 15:37:01,556 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-13 15:37:01,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:37:01,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-13 15:37:01,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=659, Unknown=0, NotChecked=0, Total=812 [2024-11-13 15:37:01,557 INFO L87 Difference]: Start difference. First operand 271 states and 361 transitions. Second operand has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 29 states have internal predecessors, (63), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2024-11-13 15:37:04,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:37:04,230 INFO L93 Difference]: Finished difference Result 307 states and 400 transitions. [2024-11-13 15:37:04,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-13 15:37:04,233 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 29 states have internal predecessors, (63), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) Word has length 74 [2024-11-13 15:37:04,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:37:04,235 INFO L225 Difference]: With dead ends: 307 [2024-11-13 15:37:04,235 INFO L226 Difference]: Without dead ends: 293 [2024-11-13 15:37:04,236 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=227, Invalid=963, Unknown=0, NotChecked=0, Total=1190 [2024-11-13 15:37:04,236 INFO L432 NwaCegarLoop]: 78 mSDtfsCounter, 44 mSDsluCounter, 813 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 891 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2024-11-13 15:37:04,236 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 891 Invalid, 494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 474 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2024-11-13 15:37:04,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2024-11-13 15:37:04,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 279. [2024-11-13 15:37:04,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 208 states have (on average 1.1394230769230769) internal successors, (237), 220 states have internal predecessors, (237), 45 states have call successors, (45), 17 states have call predecessors, (45), 25 states have return successors, (85), 41 states have call predecessors, (85), 44 states have call successors, (85) [2024-11-13 15:37:04,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 367 transitions. [2024-11-13 15:37:04,341 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 367 transitions. Word has length 74 [2024-11-13 15:37:04,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:37:04,341 INFO L471 AbstractCegarLoop]: Abstraction has 279 states and 367 transitions. [2024-11-13 15:37:04,341 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 29 states have internal predecessors, (63), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2024-11-13 15:37:04,341 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 367 transitions. [2024-11-13 15:37:04,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2024-11-13 15:37:04,342 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:37:04,342 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:37:04,358 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2024-11-13 15:37:04,543 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:37:04,543 INFO L396 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:37:04,543 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:37:04,543 INFO L85 PathProgramCache]: Analyzing trace with hash 187453460, now seen corresponding path program 1 times [2024-11-13 15:37:04,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:37:04,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2119624944] [2024-11-13 15:37:04,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:37:04,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:37:04,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:37:04,546 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:37:04,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2024-11-13 15:37:04,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:37:04,646 INFO L255 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-13 15:37:04,648 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:37:05,519 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-13 15:37:05,519 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:37:07,893 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-13 15:37:07,893 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:37:07,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119624944] [2024-11-13 15:37:07,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119624944] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:37:07,893 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 15:37:07,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 26 [2024-11-13 15:37:07,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31693783] [2024-11-13 15:37:07,893 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 15:37:07,894 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-13 15:37:07,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:37:07,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-13 15:37:07,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2024-11-13 15:37:07,895 INFO L87 Difference]: Start difference. First operand 279 states and 367 transitions. Second operand has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 26 states have internal predecessors, (59), 9 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (12), 9 states have call predecessors, (12), 8 states have call successors, (12) [2024-11-13 15:37:11,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:37:11,235 INFO L93 Difference]: Finished difference Result 311 states and 399 transitions. [2024-11-13 15:37:11,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-13 15:37:11,236 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 26 states have internal predecessors, (59), 9 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (12), 9 states have call predecessors, (12), 8 states have call successors, (12) Word has length 77 [2024-11-13 15:37:11,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:37:11,238 INFO L225 Difference]: With dead ends: 311 [2024-11-13 15:37:11,238 INFO L226 Difference]: Without dead ends: 238 [2024-11-13 15:37:11,239 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=233, Invalid=1249, Unknown=0, NotChecked=0, Total=1482 [2024-11-13 15:37:11,239 INFO L432 NwaCegarLoop]: 78 mSDtfsCounter, 54 mSDsluCounter, 883 mSDsCounter, 0 mSdLazyCounter, 528 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 961 SdHoareTripleChecker+Invalid, 560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2024-11-13 15:37:11,239 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 961 Invalid, 560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 528 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2024-11-13 15:37:11,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2024-11-13 15:37:11,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 223. [2024-11-13 15:37:11,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 166 states have (on average 1.1024096385542168) internal successors, (183), 174 states have internal predecessors, (183), 35 states have call successors, (35), 15 states have call predecessors, (35), 21 states have return successors, (70), 33 states have call predecessors, (70), 34 states have call successors, (70) [2024-11-13 15:37:11,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 288 transitions. [2024-11-13 15:37:11,293 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 288 transitions. Word has length 77 [2024-11-13 15:37:11,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:37:11,294 INFO L471 AbstractCegarLoop]: Abstraction has 223 states and 288 transitions. [2024-11-13 15:37:11,294 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 26 states have internal predecessors, (59), 9 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (12), 9 states have call predecessors, (12), 8 states have call successors, (12) [2024-11-13 15:37:11,294 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 288 transitions. [2024-11-13 15:37:11,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2024-11-13 15:37:11,295 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:37:11,295 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:37:11,311 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2024-11-13 15:37:11,496 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:37:11,496 INFO L396 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:37:11,496 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:37:11,496 INFO L85 PathProgramCache]: Analyzing trace with hash 735102206, now seen corresponding path program 1 times [2024-11-13 15:37:11,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:37:11,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2063702696] [2024-11-13 15:37:11,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:37:11,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:37:11,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:37:11,498 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:37:11,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2024-11-13 15:37:11,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:37:11,576 INFO L255 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-13 15:37:11,578 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:37:11,622 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-13 15:37:11,622 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 15:37:11,622 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:37:11,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063702696] [2024-11-13 15:37:11,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063702696] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:37:11,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 15:37:11,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-13 15:37:11,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932768513] [2024-11-13 15:37:11,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:37:11,623 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-13 15:37:11,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:37:11,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-13 15:37:11,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-13 15:37:11,624 INFO L87 Difference]: Start difference. First operand 223 states and 288 transitions. Second operand has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 5 states have internal predecessors, (41), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2024-11-13 15:37:11,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:37:11,711 INFO L93 Difference]: Finished difference Result 234 states and 299 transitions. [2024-11-13 15:37:11,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-13 15:37:11,712 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 5 states have internal predecessors, (41), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 76 [2024-11-13 15:37:11,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:37:11,713 INFO L225 Difference]: With dead ends: 234 [2024-11-13 15:37:11,713 INFO L226 Difference]: Without dead ends: 225 [2024-11-13 15:37:11,714 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-13 15:37:11,714 INFO L432 NwaCegarLoop]: 68 mSDtfsCounter, 0 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-13 15:37:11,714 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 325 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 15:37:11,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2024-11-13 15:37:11,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 223. [2024-11-13 15:37:11,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 167 states have (on average 1.1017964071856288) internal successors, (184), 174 states have internal predecessors, (184), 34 states have call successors, (34), 15 states have call predecessors, (34), 21 states have return successors, (61), 33 states have call predecessors, (61), 33 states have call successors, (61) [2024-11-13 15:37:11,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 279 transitions. [2024-11-13 15:37:11,765 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 279 transitions. Word has length 76 [2024-11-13 15:37:11,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:37:11,765 INFO L471 AbstractCegarLoop]: Abstraction has 223 states and 279 transitions. [2024-11-13 15:37:11,765 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 5 states have internal predecessors, (41), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2024-11-13 15:37:11,765 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 279 transitions. [2024-11-13 15:37:11,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2024-11-13 15:37:11,766 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:37:11,767 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:37:11,782 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2024-11-13 15:37:11,967 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:37:11,967 INFO L396 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:37:11,967 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:37:11,967 INFO L85 PathProgramCache]: Analyzing trace with hash -1505545125, now seen corresponding path program 1 times [2024-11-13 15:37:11,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:37:11,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [587231981] [2024-11-13 15:37:11,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:37:11,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:37:11,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:37:11,970 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:37:11,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2024-11-13 15:37:12,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:37:12,048 INFO L255 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-13 15:37:12,049 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:37:27,982 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-13 15:37:27,982 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:37:29,112 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:37:29,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587231981] [2024-11-13 15:37:29,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587231981] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:37:29,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [48343838] [2024-11-13 15:37:29,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:37:29,112 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-13 15:37:29,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/cvc4 [2024-11-13 15:37:29,116 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-13 15:37:29,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/cvc4 --incremental --print-success --lang smt (56)] Waiting until timeout for monitored process [2024-11-13 15:37:29,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:37:29,268 INFO L255 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-13 15:37:29,270 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:37:53,495 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-13 15:37:53,496 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:37:54,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [48343838] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:37:54,648 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 15:37:54,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 16 [2024-11-13 15:37:54,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205152782] [2024-11-13 15:37:54,649 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 15:37:54,649 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-13 15:37:54,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:37:54,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-13 15:37:54,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=229, Unknown=7, NotChecked=0, Total=272 [2024-11-13 15:37:54,650 INFO L87 Difference]: Start difference. First operand 223 states and 279 transitions. Second operand has 16 states, 16 states have (on average 3.4375) internal successors, (55), 15 states have internal predecessors, (55), 5 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 6 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-13 15:37:59,938 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-13 15:38:03,990 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-13 15:38:07,746 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.34s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-13 15:38:10,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:38:10,741 INFO L93 Difference]: Finished difference Result 243 states and 302 transitions. [2024-11-13 15:38:10,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-13 15:38:10,743 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 15 states have internal predecessors, (55), 5 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 6 states have call predecessors, (8), 4 states have call successors, (8) Word has length 81 [2024-11-13 15:38:10,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:38:10,745 INFO L225 Difference]: With dead ends: 243 [2024-11-13 15:38:10,745 INFO L226 Difference]: Without dead ends: 234 [2024-11-13 15:38:10,745 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 161 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 41.1s TimeCoverageRelationStatistics Valid=41, Invalid=258, Unknown=7, NotChecked=0, Total=306 [2024-11-13 15:38:10,746 INFO L432 NwaCegarLoop]: 76 mSDtfsCounter, 14 mSDsluCounter, 813 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 889 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.8s IncrementalHoareTripleChecker+Time [2024-11-13 15:38:10,746 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 889 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 306 Invalid, 2 Unknown, 0 Unchecked, 15.8s Time] [2024-11-13 15:38:10,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2024-11-13 15:38:10,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 229. [2024-11-13 15:38:10,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 171 states have (on average 1.0994152046783625) internal successors, (188), 178 states have internal predecessors, (188), 35 states have call successors, (35), 15 states have call predecessors, (35), 22 states have return successors, (65), 35 states have call predecessors, (65), 34 states have call successors, (65) [2024-11-13 15:38:10,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 288 transitions. [2024-11-13 15:38:10,822 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 288 transitions. Word has length 81 [2024-11-13 15:38:10,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:38:10,823 INFO L471 AbstractCegarLoop]: Abstraction has 229 states and 288 transitions. [2024-11-13 15:38:10,823 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 15 states have internal predecessors, (55), 5 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 6 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-13 15:38:10,823 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 288 transitions. [2024-11-13 15:38:10,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2024-11-13 15:38:10,824 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:38:10,824 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:38:10,828 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/cvc4 --incremental --print-success --lang smt (56)] Ended with exit code 0 [2024-11-13 15:38:11,050 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2024-11-13 15:38:11,225 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/cvc4 --incremental --print-success --lang smt,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:38:11,225 INFO L396 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:38:11,225 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:38:11,225 INFO L85 PathProgramCache]: Analyzing trace with hash 1403218777, now seen corresponding path program 1 times [2024-11-13 15:38:11,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:38:11,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [557828836] [2024-11-13 15:38:11,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:38:11,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:38:11,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:38:11,229 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:38:11,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2024-11-13 15:38:11,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:38:11,342 INFO L255 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-13 15:38:11,344 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:38:12,768 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 26 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-13 15:38:12,769 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:38:13,262 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:38:13,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557828836] [2024-11-13 15:38:13,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557828836] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:38:13,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [326226009] [2024-11-13 15:38:13,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:38:13,262 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-13 15:38:13,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/cvc4 [2024-11-13 15:38:13,264 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-13 15:38:13,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/cvc4 --incremental --print-success --lang smt (58)] Waiting until timeout for monitored process [2024-11-13 15:38:13,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:38:13,434 INFO L255 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-13 15:38:13,436 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:38:14,253 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-13 15:38:14,253 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:38:14,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [326226009] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:38:14,712 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 15:38:14,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 15 [2024-11-13 15:38:14,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576875007] [2024-11-13 15:38:14,712 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 15:38:14,712 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-13 15:38:14,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:38:14,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-13 15:38:14,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2024-11-13 15:38:14,713 INFO L87 Difference]: Start difference. First operand 229 states and 288 transitions. Second operand has 15 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 14 states have internal predecessors, (55), 6 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2024-11-13 15:38:16,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:38:16,739 INFO L93 Difference]: Finished difference Result 249 states and 313 transitions. [2024-11-13 15:38:16,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-13 15:38:16,740 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 14 states have internal predecessors, (55), 6 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) Word has length 81 [2024-11-13 15:38:16,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:38:16,741 INFO L225 Difference]: With dead ends: 249 [2024-11-13 15:38:16,741 INFO L226 Difference]: Without dead ends: 240 [2024-11-13 15:38:16,742 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 161 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2024-11-13 15:38:16,742 INFO L432 NwaCegarLoop]: 75 mSDtfsCounter, 27 mSDsluCounter, 750 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 825 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-11-13 15:38:16,743 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 825 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-11-13 15:38:16,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2024-11-13 15:38:16,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 233. [2024-11-13 15:38:16,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 174 states have (on average 1.0977011494252873) internal successors, (191), 181 states have internal predecessors, (191), 35 states have call successors, (35), 15 states have call predecessors, (35), 23 states have return successors, (71), 36 states have call predecessors, (71), 34 states have call successors, (71) [2024-11-13 15:38:16,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 297 transitions. [2024-11-13 15:38:16,806 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 297 transitions. Word has length 81 [2024-11-13 15:38:16,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:38:16,806 INFO L471 AbstractCegarLoop]: Abstraction has 233 states and 297 transitions. [2024-11-13 15:38:16,806 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 14 states have internal predecessors, (55), 6 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2024-11-13 15:38:16,806 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 297 transitions. [2024-11-13 15:38:16,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2024-11-13 15:38:16,808 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:38:16,808 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:38:16,810 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/cvc4 --incremental --print-success --lang smt (58)] Ended with exit code 0 [2024-11-13 15:38:17,023 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2024-11-13 15:38:17,208 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/cvc4 --incremental --print-success --lang smt,57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:38:17,209 INFO L396 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:38:17,209 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:38:17,209 INFO L85 PathProgramCache]: Analyzing trace with hash -528697517, now seen corresponding path program 2 times [2024-11-13 15:38:17,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:38:17,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [45883838] [2024-11-13 15:38:17,209 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 15:38:17,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:38:17,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:38:17,211 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:38:17,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2024-11-13 15:38:17,309 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 15:38:17,309 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 15:38:17,317 INFO L255 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-13 15:38:17,319 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:38:18,785 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-13 15:38:18,785 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:38:22,691 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-13 15:38:22,691 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:38:22,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45883838] [2024-11-13 15:38:22,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45883838] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:38:22,691 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 15:38:22,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13] total 26 [2024-11-13 15:38:22,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261550224] [2024-11-13 15:38:22,691 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 15:38:22,692 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-13 15:38:22,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:38:22,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-13 15:38:22,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2024-11-13 15:38:22,693 INFO L87 Difference]: Start difference. First operand 233 states and 297 transitions. Second operand has 26 states, 25 states have (on average 2.84) internal successors, (71), 25 states have internal predecessors, (71), 10 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (13), 10 states have call predecessors, (13), 9 states have call successors, (13) [2024-11-13 15:38:30,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:38:30,753 INFO L93 Difference]: Finished difference Result 329 states and 403 transitions. [2024-11-13 15:38:30,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-11-13 15:38:30,755 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.84) internal successors, (71), 25 states have internal predecessors, (71), 10 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (13), 10 states have call predecessors, (13), 9 states have call successors, (13) Word has length 81 [2024-11-13 15:38:30,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:38:30,756 INFO L225 Difference]: With dead ends: 329 [2024-11-13 15:38:30,756 INFO L226 Difference]: Without dead ends: 226 [2024-11-13 15:38:30,758 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 135 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=346, Invalid=2006, Unknown=0, NotChecked=0, Total=2352 [2024-11-13 15:38:30,758 INFO L432 NwaCegarLoop]: 68 mSDtfsCounter, 79 mSDsluCounter, 940 mSDsCounter, 0 mSdLazyCounter, 589 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 1008 SdHoareTripleChecker+Invalid, 611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2024-11-13 15:38:30,758 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 1008 Invalid, 611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 589 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2024-11-13 15:38:30,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2024-11-13 15:38:30,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 193. [2024-11-13 15:38:30,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 144 states have (on average 1.1111111111111112) internal successors, (160), 149 states have internal predecessors, (160), 29 states have call successors, (29), 13 states have call predecessors, (29), 19 states have return successors, (57), 30 states have call predecessors, (57), 28 states have call successors, (57) [2024-11-13 15:38:30,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 246 transitions. [2024-11-13 15:38:30,832 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 246 transitions. Word has length 81 [2024-11-13 15:38:30,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:38:30,833 INFO L471 AbstractCegarLoop]: Abstraction has 193 states and 246 transitions. [2024-11-13 15:38:30,833 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.84) internal successors, (71), 25 states have internal predecessors, (71), 10 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (13), 10 states have call predecessors, (13), 9 states have call successors, (13) [2024-11-13 15:38:30,833 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 246 transitions. [2024-11-13 15:38:30,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2024-11-13 15:38:30,834 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:38:30,834 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:38:30,855 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2024-11-13 15:38:31,035 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:38:31,035 INFO L396 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:38:31,035 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:38:31,035 INFO L85 PathProgramCache]: Analyzing trace with hash -2008837227, now seen corresponding path program 1 times [2024-11-13 15:38:31,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:38:31,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [516362080] [2024-11-13 15:38:31,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:38:31,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:38:31,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:38:31,037 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:38:31,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2024-11-13 15:38:31,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:38:31,225 INFO L255 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-11-13 15:38:31,227 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:38:35,160 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-13 15:38:35,160 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:38:48,966 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-13 15:38:48,966 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:38:48,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516362080] [2024-11-13 15:38:48,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516362080] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:38:48,967 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 15:38:48,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23] total 43 [2024-11-13 15:38:48,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692851562] [2024-11-13 15:38:48,967 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 15:38:48,967 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-11-13 15:38:48,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:38:48,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-11-13 15:38:48,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=1597, Unknown=0, NotChecked=0, Total=1806 [2024-11-13 15:38:48,969 INFO L87 Difference]: Start difference. First operand 193 states and 246 transitions. Second operand has 43 states, 41 states have (on average 1.7560975609756098) internal successors, (72), 40 states have internal predecessors, (72), 10 states have call successors, (13), 2 states have call predecessors, (13), 5 states have return successors, (13), 11 states have call predecessors, (13), 9 states have call successors, (13) [2024-11-13 15:39:17,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:39:17,821 INFO L93 Difference]: Finished difference Result 238 states and 301 transitions. [2024-11-13 15:39:17,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-11-13 15:39:17,822 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 41 states have (on average 1.7560975609756098) internal successors, (72), 40 states have internal predecessors, (72), 10 states have call successors, (13), 2 states have call predecessors, (13), 5 states have return successors, (13), 11 states have call predecessors, (13), 9 states have call successors, (13) Word has length 81 [2024-11-13 15:39:17,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:39:17,824 INFO L225 Difference]: With dead ends: 238 [2024-11-13 15:39:17,824 INFO L226 Difference]: Without dead ends: 223 [2024-11-13 15:39:17,825 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 536 ImplicationChecksByTransitivity, 30.1s TimeCoverageRelationStatistics Valid=486, Invalid=3803, Unknown=1, NotChecked=0, Total=4290 [2024-11-13 15:39:17,826 INFO L432 NwaCegarLoop]: 61 mSDtfsCounter, 51 mSDsluCounter, 1240 mSDsCounter, 0 mSdLazyCounter, 1663 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 1301 SdHoareTripleChecker+Invalid, 1699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.6s IncrementalHoareTripleChecker+Time [2024-11-13 15:39:17,826 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 1301 Invalid, 1699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1663 Invalid, 0 Unknown, 0 Unchecked, 12.6s Time] [2024-11-13 15:39:17,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2024-11-13 15:39:17,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 202. [2024-11-13 15:39:17,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 152 states have (on average 1.111842105263158) internal successors, (169), 156 states have internal predecessors, (169), 30 states have call successors, (30), 14 states have call predecessors, (30), 19 states have return successors, (59), 31 states have call predecessors, (59), 29 states have call successors, (59) [2024-11-13 15:39:17,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 258 transitions. [2024-11-13 15:39:17,907 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 258 transitions. Word has length 81 [2024-11-13 15:39:17,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:39:17,907 INFO L471 AbstractCegarLoop]: Abstraction has 202 states and 258 transitions. [2024-11-13 15:39:17,907 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 41 states have (on average 1.7560975609756098) internal successors, (72), 40 states have internal predecessors, (72), 10 states have call successors, (13), 2 states have call predecessors, (13), 5 states have return successors, (13), 11 states have call predecessors, (13), 9 states have call successors, (13) [2024-11-13 15:39:17,907 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 258 transitions. [2024-11-13 15:39:17,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2024-11-13 15:39:17,909 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:39:17,909 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:39:17,932 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2024-11-13 15:39:18,109 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:39:18,110 INFO L396 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:39:18,110 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:39:18,110 INFO L85 PathProgramCache]: Analyzing trace with hash 1610599360, now seen corresponding path program 1 times [2024-11-13 15:39:18,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:39:18,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [932315101] [2024-11-13 15:39:18,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:39:18,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:39:18,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:39:18,113 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:39:18,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2024-11-13 15:39:18,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:39:18,241 INFO L255 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-13 15:39:18,243 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:39:19,744 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-13 15:39:19,744 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:39:23,108 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-13 15:39:23,108 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:39:23,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932315101] [2024-11-13 15:39:23,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932315101] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:39:23,108 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 15:39:23,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 26 [2024-11-13 15:39:23,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003894310] [2024-11-13 15:39:23,108 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 15:39:23,109 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-13 15:39:23,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:39:23,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-13 15:39:23,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2024-11-13 15:39:23,110 INFO L87 Difference]: Start difference. First operand 202 states and 258 transitions. Second operand has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 26 states have internal predecessors, (60), 9 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (12), 9 states have call predecessors, (12), 8 states have call successors, (12) [2024-11-13 15:39:26,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:39:26,095 INFO L93 Difference]: Finished difference Result 237 states and 295 transitions. [2024-11-13 15:39:26,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-13 15:39:26,097 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 26 states have internal predecessors, (60), 9 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (12), 9 states have call predecessors, (12), 8 states have call successors, (12) Word has length 78 [2024-11-13 15:39:26,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:39:26,098 INFO L225 Difference]: With dead ends: 237 [2024-11-13 15:39:26,098 INFO L226 Difference]: Without dead ends: 182 [2024-11-13 15:39:26,098 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=171, Invalid=885, Unknown=0, NotChecked=0, Total=1056 [2024-11-13 15:39:26,099 INFO L432 NwaCegarLoop]: 65 mSDtfsCounter, 34 mSDsluCounter, 863 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 928 SdHoareTripleChecker+Invalid, 385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2024-11-13 15:39:26,099 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 928 Invalid, 385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 371 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2024-11-13 15:39:26,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2024-11-13 15:39:26,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 174. [2024-11-13 15:39:26,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 130 states have (on average 1.1) internal successors, (143), 134 states have internal predecessors, (143), 26 states have call successors, (26), 12 states have call predecessors, (26), 17 states have return successors, (53), 27 states have call predecessors, (53), 25 states have call successors, (53) [2024-11-13 15:39:26,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 222 transitions. [2024-11-13 15:39:26,137 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 222 transitions. Word has length 78 [2024-11-13 15:39:26,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:39:26,137 INFO L471 AbstractCegarLoop]: Abstraction has 174 states and 222 transitions. [2024-11-13 15:39:26,137 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 26 states have internal predecessors, (60), 9 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (12), 9 states have call predecessors, (12), 8 states have call successors, (12) [2024-11-13 15:39:26,137 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 222 transitions. [2024-11-13 15:39:26,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2024-11-13 15:39:26,138 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:39:26,138 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:39:26,153 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2024-11-13 15:39:26,338 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:39:26,339 INFO L396 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:39:26,339 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:39:26,339 INFO L85 PathProgramCache]: Analyzing trace with hash 1733171417, now seen corresponding path program 2 times [2024-11-13 15:39:26,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:39:26,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1340697619] [2024-11-13 15:39:26,339 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 15:39:26,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:39:26,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:39:26,341 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:39:26,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2024-11-13 15:39:26,522 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 15:39:26,522 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 15:39:26,525 INFO L255 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-11-13 15:39:26,527 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:39:30,992 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2024-11-13 15:39:30,992 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:39:45,873 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-13 15:39:45,873 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:39:45,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340697619] [2024-11-13 15:39:45,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340697619] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:39:45,874 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 15:39:45,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 26] total 47 [2024-11-13 15:39:45,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69093800] [2024-11-13 15:39:45,874 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 15:39:45,874 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-11-13 15:39:45,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:39:45,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-11-13 15:39:45,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=1917, Unknown=0, NotChecked=0, Total=2162 [2024-11-13 15:39:45,875 INFO L87 Difference]: Start difference. First operand 174 states and 222 transitions. Second operand has 47 states, 45 states have (on average 1.711111111111111) internal successors, (77), 43 states have internal predecessors, (77), 10 states have call successors, (13), 2 states have call predecessors, (13), 6 states have return successors, (13), 11 states have call predecessors, (13), 9 states have call successors, (13) [2024-11-13 15:40:10,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:40:10,333 INFO L93 Difference]: Finished difference Result 215 states and 268 transitions. [2024-11-13 15:40:10,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2024-11-13 15:40:10,335 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 45 states have (on average 1.711111111111111) internal successors, (77), 43 states have internal predecessors, (77), 10 states have call successors, (13), 2 states have call predecessors, (13), 6 states have return successors, (13), 11 states have call predecessors, (13), 9 states have call successors, (13) Word has length 81 [2024-11-13 15:40:10,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:40:10,336 INFO L225 Difference]: With dead ends: 215 [2024-11-13 15:40:10,336 INFO L226 Difference]: Without dead ends: 167 [2024-11-13 15:40:10,337 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 682 ImplicationChecksByTransitivity, 28.5s TimeCoverageRelationStatistics Valid=573, Invalid=4683, Unknown=0, NotChecked=0, Total=5256 [2024-11-13 15:40:10,337 INFO L432 NwaCegarLoop]: 50 mSDtfsCounter, 61 mSDsluCounter, 1316 mSDsCounter, 0 mSdLazyCounter, 1804 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 1366 SdHoareTripleChecker+Invalid, 1848 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1804 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.4s IncrementalHoareTripleChecker+Time [2024-11-13 15:40:10,337 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 1366 Invalid, 1848 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1804 Invalid, 0 Unknown, 0 Unchecked, 11.4s Time] [2024-11-13 15:40:10,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2024-11-13 15:40:10,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 148. [2024-11-13 15:40:10,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 111 states have (on average 1.1261261261261262) internal successors, (125), 114 states have internal predecessors, (125), 22 states have call successors, (22), 10 states have call predecessors, (22), 14 states have return successors, (47), 23 states have call predecessors, (47), 21 states have call successors, (47) [2024-11-13 15:40:10,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 194 transitions. [2024-11-13 15:40:10,372 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 194 transitions. Word has length 81 [2024-11-13 15:40:10,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:40:10,372 INFO L471 AbstractCegarLoop]: Abstraction has 148 states and 194 transitions. [2024-11-13 15:40:10,373 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 45 states have (on average 1.711111111111111) internal successors, (77), 43 states have internal predecessors, (77), 10 states have call successors, (13), 2 states have call predecessors, (13), 6 states have return successors, (13), 11 states have call predecessors, (13), 9 states have call successors, (13) [2024-11-13 15:40:10,373 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 194 transitions. [2024-11-13 15:40:10,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2024-11-13 15:40:10,373 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:40:10,373 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:40:10,388 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2024-11-13 15:40:10,574 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:40:10,574 INFO L396 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:40:10,574 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:40:10,574 INFO L85 PathProgramCache]: Analyzing trace with hash -433301397, now seen corresponding path program 1 times [2024-11-13 15:40:10,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:40:10,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [712263354] [2024-11-13 15:40:10,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:40:10,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:40:10,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:40:10,576 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:40:10,577 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2024-11-13 15:40:10,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:40:10,663 INFO L255 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-13 15:40:10,664 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:40:11,115 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 21 proven. 3 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-13 15:40:11,115 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:40:12,036 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 21 proven. 3 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-13 15:40:12,036 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:40:12,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712263354] [2024-11-13 15:40:12,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712263354] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:40:12,036 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 15:40:12,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2024-11-13 15:40:12,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799393721] [2024-11-13 15:40:12,036 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 15:40:12,037 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-13 15:40:12,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:40:12,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-13 15:40:12,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2024-11-13 15:40:12,038 INFO L87 Difference]: Start difference. First operand 148 states and 194 transitions. Second operand has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 15 states have internal predecessors, (67), 7 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (13), 9 states have call predecessors, (13), 6 states have call successors, (13) [2024-11-13 15:40:12,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:40:12,959 INFO L93 Difference]: Finished difference Result 159 states and 206 transitions. [2024-11-13 15:40:12,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-13 15:40:12,960 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 15 states have internal predecessors, (67), 7 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (13), 9 states have call predecessors, (13), 6 states have call successors, (13) Word has length 82 [2024-11-13 15:40:12,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:40:12,961 INFO L225 Difference]: With dead ends: 159 [2024-11-13 15:40:12,961 INFO L226 Difference]: Without dead ends: 127 [2024-11-13 15:40:12,961 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2024-11-13 15:40:12,962 INFO L432 NwaCegarLoop]: 69 mSDtfsCounter, 31 mSDsluCounter, 572 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 641 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-13 15:40:12,962 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 641 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-13 15:40:12,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2024-11-13 15:40:12,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 124. [2024-11-13 15:40:12,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 93 states have (on average 1.1505376344086022) internal successors, (107), 95 states have internal predecessors, (107), 19 states have call successors, (19), 8 states have call predecessors, (19), 11 states have return successors, (42), 20 states have call predecessors, (42), 18 states have call successors, (42) [2024-11-13 15:40:12,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 168 transitions. [2024-11-13 15:40:12,989 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 168 transitions. Word has length 82 [2024-11-13 15:40:12,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:40:12,989 INFO L471 AbstractCegarLoop]: Abstraction has 124 states and 168 transitions. [2024-11-13 15:40:12,990 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 15 states have internal predecessors, (67), 7 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (13), 9 states have call predecessors, (13), 6 states have call successors, (13) [2024-11-13 15:40:12,990 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 168 transitions. [2024-11-13 15:40:12,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2024-11-13 15:40:12,990 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:40:12,991 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:40:13,006 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2024-11-13 15:40:13,191 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:40:13,191 INFO L396 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:40:13,191 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:40:13,192 INFO L85 PathProgramCache]: Analyzing trace with hash 1167144879, now seen corresponding path program 1 times [2024-11-13 15:40:13,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:40:13,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1031777765] [2024-11-13 15:40:13,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:40:13,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:40:13,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:40:13,197 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:40:13,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2024-11-13 15:40:13,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:40:13,282 INFO L255 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-13 15:40:13,283 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:40:13,743 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-13 15:40:13,743 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:40:14,781 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-13 15:40:14,781 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:40:14,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031777765] [2024-11-13 15:40:14,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031777765] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:40:14,781 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 15:40:14,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2024-11-13 15:40:14,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241972902] [2024-11-13 15:40:14,781 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 15:40:14,782 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-13 15:40:14,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:40:14,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-13 15:40:14,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2024-11-13 15:40:14,783 INFO L87 Difference]: Start difference. First operand 124 states and 168 transitions. Second operand has 15 states, 15 states have (on average 4.4) internal successors, (66), 15 states have internal predecessors, (66), 8 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2024-11-13 15:40:16,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:40:16,109 INFO L93 Difference]: Finished difference Result 133 states and 176 transitions. [2024-11-13 15:40:16,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-13 15:40:16,110 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.4) internal successors, (66), 15 states have internal predecessors, (66), 8 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) Word has length 82 [2024-11-13 15:40:16,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:40:16,111 INFO L225 Difference]: With dead ends: 133 [2024-11-13 15:40:16,111 INFO L226 Difference]: Without dead ends: 113 [2024-11-13 15:40:16,112 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2024-11-13 15:40:16,112 INFO L432 NwaCegarLoop]: 78 mSDtfsCounter, 61 mSDsluCounter, 572 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 650 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-13 15:40:16,112 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 650 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-13 15:40:16,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2024-11-13 15:40:16,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2024-11-13 15:40:16,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 84 states have (on average 1.1547619047619047) internal successors, (97), 87 states have internal predecessors, (97), 17 states have call successors, (17), 7 states have call predecessors, (17), 11 states have return successors, (38), 18 states have call predecessors, (38), 16 states have call successors, (38) [2024-11-13 15:40:16,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 152 transitions. [2024-11-13 15:40:16,144 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 152 transitions. Word has length 82 [2024-11-13 15:40:16,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:40:16,144 INFO L471 AbstractCegarLoop]: Abstraction has 113 states and 152 transitions. [2024-11-13 15:40:16,144 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.4) internal successors, (66), 15 states have internal predecessors, (66), 8 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2024-11-13 15:40:16,145 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 152 transitions. [2024-11-13 15:40:16,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2024-11-13 15:40:16,146 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:40:16,146 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:40:16,164 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2024-11-13 15:40:16,346 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:40:16,346 INFO L396 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:40:16,346 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:40:16,347 INFO L85 PathProgramCache]: Analyzing trace with hash 2066309629, now seen corresponding path program 1 times [2024-11-13 15:40:16,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:40:16,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [651810467] [2024-11-13 15:40:16,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:40:16,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:40:16,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:40:16,349 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:40:16,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2024-11-13 15:40:16,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:40:16,436 INFO L255 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-13 15:40:16,437 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:40:33,728 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-13 15:40:33,728 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:40:38,387 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-13 15:40:38,387 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:40:38,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651810467] [2024-11-13 15:40:38,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651810467] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:40:38,388 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 15:40:38,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2024-11-13 15:40:38,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545914551] [2024-11-13 15:40:38,388 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 15:40:38,388 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-13 15:40:38,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:40:38,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-13 15:40:38,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=512, Unknown=1, NotChecked=0, Total=600 [2024-11-13 15:40:38,389 INFO L87 Difference]: Start difference. First operand 113 states and 152 transitions. Second operand has 25 states, 25 states have (on average 2.64) internal successors, (66), 25 states have internal predecessors, (66), 10 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (13), 10 states have call predecessors, (13), 9 states have call successors, (13) [2024-11-13 15:41:04,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:41:04,914 INFO L93 Difference]: Finished difference Result 127 states and 166 transitions. [2024-11-13 15:41:04,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-13 15:41:04,915 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.64) internal successors, (66), 25 states have internal predecessors, (66), 10 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (13), 10 states have call predecessors, (13), 9 states have call successors, (13) Word has length 79 [2024-11-13 15:41:04,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:41:04,916 INFO L225 Difference]: With dead ends: 127 [2024-11-13 15:41:04,916 INFO L226 Difference]: Without dead ends: 120 [2024-11-13 15:41:04,917 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 133 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 44.1s TimeCoverageRelationStatistics Valid=189, Invalid=998, Unknown=3, NotChecked=0, Total=1190 [2024-11-13 15:41:04,917 INFO L432 NwaCegarLoop]: 63 mSDtfsCounter, 37 mSDsluCounter, 819 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 882 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2024-11-13 15:41:04,917 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 882 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 343 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2024-11-13 15:41:04,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2024-11-13 15:41:04,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 113. [2024-11-13 15:41:04,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 84 states have (on average 1.1547619047619047) internal successors, (97), 87 states have internal predecessors, (97), 17 states have call successors, (17), 7 states have call predecessors, (17), 11 states have return successors, (37), 18 states have call predecessors, (37), 16 states have call successors, (37) [2024-11-13 15:41:04,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 151 transitions. [2024-11-13 15:41:04,946 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 151 transitions. Word has length 79 [2024-11-13 15:41:04,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:41:04,946 INFO L471 AbstractCegarLoop]: Abstraction has 113 states and 151 transitions. [2024-11-13 15:41:04,946 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.64) internal successors, (66), 25 states have internal predecessors, (66), 10 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (13), 10 states have call predecessors, (13), 9 states have call successors, (13) [2024-11-13 15:41:04,946 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 151 transitions. [2024-11-13 15:41:04,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2024-11-13 15:41:04,947 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:41:04,948 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:41:04,976 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2024-11-13 15:41:05,148 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:41:05,148 INFO L396 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:41:05,149 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:41:05,149 INFO L85 PathProgramCache]: Analyzing trace with hash 1847454911, now seen corresponding path program 1 times [2024-11-13 15:41:05,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:41:05,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1181558795] [2024-11-13 15:41:05,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:41:05,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:41:05,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:41:05,151 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:41:05,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2024-11-13 15:41:05,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:41:05,373 INFO L255 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-11-13 15:41:05,376 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:41:09,668 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-13 15:41:09,668 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:41:21,008 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-13 15:41:21,008 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:41:21,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181558795] [2024-11-13 15:41:21,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181558795] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:41:21,009 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 15:41:21,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23] total 43 [2024-11-13 15:41:21,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102557677] [2024-11-13 15:41:21,009 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 15:41:21,009 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-11-13 15:41:21,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:41:21,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-11-13 15:41:21,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1626, Unknown=0, NotChecked=0, Total=1806 [2024-11-13 15:41:21,010 INFO L87 Difference]: Start difference. First operand 113 states and 151 transitions. Second operand has 43 states, 41 states have (on average 1.6829268292682926) internal successors, (69), 40 states have internal predecessors, (69), 10 states have call successors, (13), 2 states have call predecessors, (13), 5 states have return successors, (13), 11 states have call predecessors, (13), 9 states have call successors, (13) [2024-11-13 15:41:47,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:41:47,715 INFO L93 Difference]: Finished difference Result 156 states and 202 transitions. [2024-11-13 15:41:47,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2024-11-13 15:41:47,717 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 41 states have (on average 1.6829268292682926) internal successors, (69), 40 states have internal predecessors, (69), 10 states have call successors, (13), 2 states have call predecessors, (13), 5 states have return successors, (13), 11 states have call predecessors, (13), 9 states have call successors, (13) Word has length 79 [2024-11-13 15:41:47,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:41:47,717 INFO L225 Difference]: With dead ends: 156 [2024-11-13 15:41:47,718 INFO L226 Difference]: Without dead ends: 145 [2024-11-13 15:41:47,719 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 28.3s TimeCoverageRelationStatistics Valid=481, Invalid=4921, Unknown=0, NotChecked=0, Total=5402 [2024-11-13 15:41:47,719 INFO L432 NwaCegarLoop]: 57 mSDtfsCounter, 44 mSDsluCounter, 1156 mSDsCounter, 0 mSdLazyCounter, 1611 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 1213 SdHoareTripleChecker+Invalid, 1668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.3s IncrementalHoareTripleChecker+Time [2024-11-13 15:41:47,719 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 1213 Invalid, 1668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1611 Invalid, 0 Unknown, 0 Unchecked, 10.3s Time] [2024-11-13 15:41:47,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2024-11-13 15:41:47,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 131. [2024-11-13 15:41:47,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 100 states have (on average 1.16) internal successors, (116), 102 states have internal predecessors, (116), 19 states have call successors, (19), 8 states have call predecessors, (19), 11 states have return successors, (37), 20 states have call predecessors, (37), 18 states have call successors, (37) [2024-11-13 15:41:47,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 172 transitions. [2024-11-13 15:41:47,755 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 172 transitions. Word has length 79 [2024-11-13 15:41:47,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:41:47,756 INFO L471 AbstractCegarLoop]: Abstraction has 131 states and 172 transitions. [2024-11-13 15:41:47,756 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 41 states have (on average 1.6829268292682926) internal successors, (69), 40 states have internal predecessors, (69), 10 states have call successors, (13), 2 states have call predecessors, (13), 5 states have return successors, (13), 11 states have call predecessors, (13), 9 states have call successors, (13) [2024-11-13 15:41:47,756 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 172 transitions. [2024-11-13 15:41:47,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2024-11-13 15:41:47,757 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:41:47,757 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:41:47,772 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2024-11-13 15:41:47,957 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:41:47,957 INFO L396 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:41:47,957 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:41:47,958 INFO L85 PathProgramCache]: Analyzing trace with hash 1205295851, now seen corresponding path program 2 times [2024-11-13 15:41:47,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:41:47,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1165436106] [2024-11-13 15:41:47,958 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 15:41:47,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:41:47,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:41:47,960 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:41:47,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2024-11-13 15:41:48,058 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 15:41:48,058 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 15:41:48,060 INFO L255 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-13 15:41:48,062 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:41:48,558 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-13 15:41:48,558 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:41:49,599 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-13 15:41:49,599 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:41:49,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165436106] [2024-11-13 15:41:49,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165436106] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:41:49,600 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 15:41:49,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2024-11-13 15:41:49,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892907717] [2024-11-13 15:41:49,600 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 15:41:49,600 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-13 15:41:49,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:41:49,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-13 15:41:49,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2024-11-13 15:41:49,601 INFO L87 Difference]: Start difference. First operand 131 states and 172 transitions. Second operand has 15 states, 15 states have (on average 4.4) internal successors, (66), 15 states have internal predecessors, (66), 8 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2024-11-13 15:41:50,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:41:50,877 INFO L93 Difference]: Finished difference Result 138 states and 178 transitions. [2024-11-13 15:41:50,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-13 15:41:50,878 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.4) internal successors, (66), 15 states have internal predecessors, (66), 8 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) Word has length 82 [2024-11-13 15:41:50,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:41:50,879 INFO L225 Difference]: With dead ends: 138 [2024-11-13 15:41:50,879 INFO L226 Difference]: Without dead ends: 115 [2024-11-13 15:41:50,879 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2024-11-13 15:41:50,879 INFO L432 NwaCegarLoop]: 76 mSDtfsCounter, 63 mSDsluCounter, 491 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 567 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-13 15:41:50,880 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 567 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-13 15:41:50,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2024-11-13 15:41:50,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 107. [2024-11-13 15:41:50,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 80 states have (on average 1.1625) internal successors, (93), 83 states have internal predecessors, (93), 16 states have call successors, (16), 7 states have call predecessors, (16), 10 states have return successors, (32), 16 states have call predecessors, (32), 15 states have call successors, (32) [2024-11-13 15:41:50,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 141 transitions. [2024-11-13 15:41:50,922 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 141 transitions. Word has length 82 [2024-11-13 15:41:50,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:41:50,922 INFO L471 AbstractCegarLoop]: Abstraction has 107 states and 141 transitions. [2024-11-13 15:41:50,923 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.4) internal successors, (66), 15 states have internal predecessors, (66), 8 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2024-11-13 15:41:50,923 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 141 transitions. [2024-11-13 15:41:50,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2024-11-13 15:41:50,923 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:41:50,923 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:41:50,942 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2024-11-13 15:41:51,124 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:41:51,124 INFO L396 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:41:51,124 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:41:51,124 INFO L85 PathProgramCache]: Analyzing trace with hash 138036927, now seen corresponding path program 2 times [2024-11-13 15:41:51,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:41:51,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [980703237] [2024-11-13 15:41:51,125 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 15:41:51,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:41:51,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:41:51,127 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:41:51,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2024-11-13 15:41:51,317 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 15:41:51,317 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 15:41:51,320 INFO L255 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-11-13 15:41:51,321 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:41:55,422 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-13 15:41:55,422 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:42:08,316 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-13 15:42:08,316 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:42:08,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980703237] [2024-11-13 15:42:08,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980703237] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:42:08,317 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 15:42:08,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 24] total 44 [2024-11-13 15:42:08,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527016356] [2024-11-13 15:42:08,317 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 15:42:08,318 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-11-13 15:42:08,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:42:08,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-11-13 15:42:08,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=1700, Unknown=0, NotChecked=0, Total=1892 [2024-11-13 15:42:08,319 INFO L87 Difference]: Start difference. First operand 107 states and 141 transitions. Second operand has 44 states, 42 states have (on average 1.6428571428571428) internal successors, (69), 41 states have internal predecessors, (69), 10 states have call successors, (13), 2 states have call predecessors, (13), 5 states have return successors, (13), 11 states have call predecessors, (13), 9 states have call successors, (13) [2024-11-13 15:42:38,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:42:38,516 INFO L93 Difference]: Finished difference Result 147 states and 188 transitions. [2024-11-13 15:42:38,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-11-13 15:42:38,517 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 42 states have (on average 1.6428571428571428) internal successors, (69), 41 states have internal predecessors, (69), 10 states have call successors, (13), 2 states have call predecessors, (13), 5 states have return successors, (13), 11 states have call predecessors, (13), 9 states have call successors, (13) Word has length 79 [2024-11-13 15:42:38,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:42:38,518 INFO L225 Difference]: With dead ends: 147 [2024-11-13 15:42:38,518 INFO L226 Difference]: Without dead ends: 134 [2024-11-13 15:42:38,519 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 830 ImplicationChecksByTransitivity, 33.0s TimeCoverageRelationStatistics Valid=501, Invalid=5199, Unknown=0, NotChecked=0, Total=5700 [2024-11-13 15:42:38,519 INFO L432 NwaCegarLoop]: 56 mSDtfsCounter, 56 mSDsluCounter, 1305 mSDsCounter, 0 mSdLazyCounter, 1641 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 1361 SdHoareTripleChecker+Invalid, 1706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1641 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.6s IncrementalHoareTripleChecker+Time [2024-11-13 15:42:38,519 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 1361 Invalid, 1706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1641 Invalid, 0 Unknown, 0 Unchecked, 10.6s Time] [2024-11-13 15:42:38,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2024-11-13 15:42:38,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 86. [2024-11-13 15:42:38,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 64 states have (on average 1.15625) internal successors, (74), 66 states have internal predecessors, (74), 13 states have call successors, (13), 6 states have call predecessors, (13), 8 states have return successors, (19), 13 states have call predecessors, (19), 12 states have call successors, (19) [2024-11-13 15:42:38,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 106 transitions. [2024-11-13 15:42:38,555 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 106 transitions. Word has length 79 [2024-11-13 15:42:38,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:42:38,555 INFO L471 AbstractCegarLoop]: Abstraction has 86 states and 106 transitions. [2024-11-13 15:42:38,555 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 42 states have (on average 1.6428571428571428) internal successors, (69), 41 states have internal predecessors, (69), 10 states have call successors, (13), 2 states have call predecessors, (13), 5 states have return successors, (13), 11 states have call predecessors, (13), 9 states have call successors, (13) [2024-11-13 15:42:38,555 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 106 transitions. [2024-11-13 15:42:38,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2024-11-13 15:42:38,556 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:42:38,556 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:42:38,576 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2024-11-13 15:42:38,756 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:42:38,756 INFO L396 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:42:38,757 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:42:38,757 INFO L85 PathProgramCache]: Analyzing trace with hash -13463194, now seen corresponding path program 1 times [2024-11-13 15:42:38,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:42:38,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [65155054] [2024-11-13 15:42:38,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:42:38,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:42:38,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:42:38,759 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:42:38,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2024-11-13 15:42:39,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:42:39,498 INFO L255 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-11-13 15:42:39,501 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:42:44,590 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-13 15:42:44,590 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:42:59,815 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-11-13 15:42:59,815 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:42:59,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65155054] [2024-11-13 15:42:59,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65155054] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:42:59,815 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 15:42:59,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 45 [2024-11-13 15:42:59,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409330259] [2024-11-13 15:42:59,815 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 15:42:59,815 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-11-13 15:42:59,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:42:59,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-11-13 15:42:59,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1798, Unknown=0, NotChecked=0, Total=1980 [2024-11-13 15:42:59,816 INFO L87 Difference]: Start difference. First operand 86 states and 106 transitions. Second operand has 45 states, 43 states have (on average 1.6046511627906976) internal successors, (69), 41 states have internal predecessors, (69), 12 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) [2024-11-13 15:43:22,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:43:22,949 INFO L93 Difference]: Finished difference Result 116 states and 142 transitions. [2024-11-13 15:43:22,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2024-11-13 15:43:22,950 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 43 states have (on average 1.6046511627906976) internal successors, (69), 41 states have internal predecessors, (69), 12 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) Word has length 84 [2024-11-13 15:43:22,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:43:22,951 INFO L225 Difference]: With dead ends: 116 [2024-11-13 15:43:22,951 INFO L226 Difference]: Without dead ends: 106 [2024-11-13 15:43:22,951 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 635 ImplicationChecksByTransitivity, 29.6s TimeCoverageRelationStatistics Valid=381, Invalid=4041, Unknown=0, NotChecked=0, Total=4422 [2024-11-13 15:43:22,952 INFO L432 NwaCegarLoop]: 58 mSDtfsCounter, 48 mSDsluCounter, 1088 mSDsCounter, 0 mSdLazyCounter, 1328 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 1146 SdHoareTripleChecker+Invalid, 1386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 1328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.5s IncrementalHoareTripleChecker+Time [2024-11-13 15:43:22,952 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 1146 Invalid, 1386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 1328 Invalid, 0 Unknown, 0 Unchecked, 9.5s Time] [2024-11-13 15:43:22,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2024-11-13 15:43:22,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 97. [2024-11-13 15:43:22,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 74 states have (on average 1.1486486486486487) internal successors, (85), 74 states have internal predecessors, (85), 14 states have call successors, (14), 7 states have call predecessors, (14), 8 states have return successors, (19), 15 states have call predecessors, (19), 13 states have call successors, (19) [2024-11-13 15:43:22,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 118 transitions. [2024-11-13 15:43:22,978 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 118 transitions. Word has length 84 [2024-11-13 15:43:22,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:43:22,978 INFO L471 AbstractCegarLoop]: Abstraction has 97 states and 118 transitions. [2024-11-13 15:43:22,978 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 43 states have (on average 1.6046511627906976) internal successors, (69), 41 states have internal predecessors, (69), 12 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) [2024-11-13 15:43:22,979 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 118 transitions. [2024-11-13 15:43:22,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2024-11-13 15:43:22,979 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:43:22,979 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:43:22,996 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2024-11-13 15:43:23,179 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:43:23,180 INFO L396 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:43:23,180 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:43:23,180 INFO L85 PathProgramCache]: Analyzing trace with hash -356616346, now seen corresponding path program 2 times [2024-11-13 15:43:23,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:43:23,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1035548742] [2024-11-13 15:43:23,180 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 15:43:23,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:43:23,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:43:23,183 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:43:23,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2024-11-13 15:43:23,992 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 15:43:23,992 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 15:43:23,995 INFO L255 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-11-13 15:43:23,998 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:43:29,817 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 11 proven. 18 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-13 15:43:29,817 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:43:46,473 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-13 15:43:46,473 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:43:46,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035548742] [2024-11-13 15:43:46,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035548742] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:43:46,473 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 15:43:46,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 48 [2024-11-13 15:43:46,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593735511] [2024-11-13 15:43:46,473 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 15:43:46,474 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-11-13 15:43:46,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:43:46,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-11-13 15:43:46,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=2059, Unknown=0, NotChecked=0, Total=2256 [2024-11-13 15:43:46,475 INFO L87 Difference]: Start difference. First operand 97 states and 118 transitions. Second operand has 48 states, 46 states have (on average 1.608695652173913) internal successors, (74), 43 states have internal predecessors, (74), 12 states have call successors, (15), 2 states have call predecessors, (15), 6 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) [2024-11-13 15:44:24,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:44:24,809 INFO L93 Difference]: Finished difference Result 123 states and 149 transitions. [2024-11-13 15:44:24,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2024-11-13 15:44:24,810 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 46 states have (on average 1.608695652173913) internal successors, (74), 43 states have internal predecessors, (74), 12 states have call successors, (15), 2 states have call predecessors, (15), 6 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) Word has length 84 [2024-11-13 15:44:24,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:44:24,810 INFO L225 Difference]: With dead ends: 123 [2024-11-13 15:44:24,811 INFO L226 Difference]: Without dead ends: 113 [2024-11-13 15:44:24,812 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 120 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 982 ImplicationChecksByTransitivity, 43.4s TimeCoverageRelationStatistics Valid=495, Invalid=5985, Unknown=0, NotChecked=0, Total=6480 [2024-11-13 15:44:24,812 INFO L432 NwaCegarLoop]: 50 mSDtfsCounter, 60 mSDsluCounter, 1106 mSDsCounter, 0 mSdLazyCounter, 1476 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 1156 SdHoareTripleChecker+Invalid, 1532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.9s IncrementalHoareTripleChecker+Time [2024-11-13 15:44:24,812 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 1156 Invalid, 1532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1476 Invalid, 0 Unknown, 0 Unchecked, 12.9s Time] [2024-11-13 15:44:24,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2024-11-13 15:44:24,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 97. [2024-11-13 15:44:24,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 74 states have (on average 1.162162162162162) internal successors, (86), 74 states have internal predecessors, (86), 14 states have call successors, (14), 8 states have call predecessors, (14), 8 states have return successors, (18), 14 states have call predecessors, (18), 13 states have call successors, (18) [2024-11-13 15:44:24,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 118 transitions. [2024-11-13 15:44:24,851 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 118 transitions. Word has length 84 [2024-11-13 15:44:24,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:44:24,851 INFO L471 AbstractCegarLoop]: Abstraction has 97 states and 118 transitions. [2024-11-13 15:44:24,851 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 46 states have (on average 1.608695652173913) internal successors, (74), 43 states have internal predecessors, (74), 12 states have call successors, (15), 2 states have call predecessors, (15), 6 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) [2024-11-13 15:44:24,851 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 118 transitions. [2024-11-13 15:44:24,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2024-11-13 15:44:24,852 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:44:24,852 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:44:24,877 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2024-11-13 15:44:25,053 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:44:25,053 INFO L396 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:44:25,053 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:44:25,053 INFO L85 PathProgramCache]: Analyzing trace with hash 1080109810, now seen corresponding path program 1 times [2024-11-13 15:44:25,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:44:25,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [272937965] [2024-11-13 15:44:25,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:44:25,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:44:25,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:44:25,056 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:44:25,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2024-11-13 15:44:25,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:44:25,306 INFO L255 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-13 15:44:25,308 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:44:27,385 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-13 15:44:27,385 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:44:32,814 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-11-13 15:44:32,814 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:44:32,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272937965] [2024-11-13 15:44:32,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272937965] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:44:32,814 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 15:44:32,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 29 [2024-11-13 15:44:32,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052292148] [2024-11-13 15:44:32,815 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 15:44:32,815 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-13 15:44:32,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:44:32,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-13 15:44:32,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2024-11-13 15:44:32,816 INFO L87 Difference]: Start difference. First operand 97 states and 118 transitions. Second operand has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 29 states have internal predecessors, (65), 11 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (14), 11 states have call predecessors, (14), 10 states have call successors, (14) [2024-11-13 15:44:41,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:44:41,193 INFO L93 Difference]: Finished difference Result 149 states and 177 transitions. [2024-11-13 15:44:41,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-13 15:44:41,195 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 29 states have internal predecessors, (65), 11 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (14), 11 states have call predecessors, (14), 10 states have call successors, (14) Word has length 85 [2024-11-13 15:44:41,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:44:41,196 INFO L225 Difference]: With dead ends: 149 [2024-11-13 15:44:41,196 INFO L226 Difference]: Without dead ends: 99 [2024-11-13 15:44:41,197 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=283, Invalid=1609, Unknown=0, NotChecked=0, Total=1892 [2024-11-13 15:44:41,197 INFO L432 NwaCegarLoop]: 69 mSDtfsCounter, 44 mSDsluCounter, 904 mSDsCounter, 0 mSdLazyCounter, 785 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 973 SdHoareTripleChecker+Invalid, 823 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 785 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2024-11-13 15:44:41,197 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 973 Invalid, 823 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 785 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2024-11-13 15:44:41,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2024-11-13 15:44:41,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 92. [2024-11-13 15:44:41,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 69 states have (on average 1.144927536231884) internal successors, (79), 71 states have internal predecessors, (79), 13 states have call successors, (13), 7 states have call predecessors, (13), 9 states have return successors, (18), 13 states have call predecessors, (18), 12 states have call successors, (18) [2024-11-13 15:44:41,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 110 transitions. [2024-11-13 15:44:41,244 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 110 transitions. Word has length 85 [2024-11-13 15:44:41,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:44:41,244 INFO L471 AbstractCegarLoop]: Abstraction has 92 states and 110 transitions. [2024-11-13 15:44:41,244 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 29 states have internal predecessors, (65), 11 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (14), 11 states have call predecessors, (14), 10 states have call successors, (14) [2024-11-13 15:44:41,244 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 110 transitions. [2024-11-13 15:44:41,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2024-11-13 15:44:41,245 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:44:41,245 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:44:41,269 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2024-11-13 15:44:41,445 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:44:41,446 INFO L396 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:44:41,446 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:44:41,446 INFO L85 PathProgramCache]: Analyzing trace with hash -967703310, now seen corresponding path program 2 times [2024-11-13 15:44:41,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:44:41,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1070854368] [2024-11-13 15:44:41,447 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 15:44:41,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:44:41,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:44:41,448 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:44:41,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2024-11-13 15:44:41,758 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 15:44:41,758 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 15:44:41,761 INFO L255 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-13 15:44:41,764 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:44:44,395 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 11 proven. 18 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-13 15:44:44,395 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:44:50,636 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-13 15:44:50,636 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:44:50,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070854368] [2024-11-13 15:44:50,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070854368] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:44:50,636 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 15:44:50,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 33 [2024-11-13 15:44:50,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925953184] [2024-11-13 15:44:50,637 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 15:44:50,637 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-13 15:44:50,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:44:50,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-13 15:44:50,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=929, Unknown=0, NotChecked=0, Total=1056 [2024-11-13 15:44:50,638 INFO L87 Difference]: Start difference. First operand 92 states and 110 transitions. Second operand has 33 states, 32 states have (on average 2.1875) internal successors, (70), 33 states have internal predecessors, (70), 11 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (14), 11 states have call predecessors, (14), 10 states have call successors, (14) [2024-11-13 15:44:57,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:44:57,303 INFO L93 Difference]: Finished difference Result 121 states and 141 transitions. [2024-11-13 15:44:57,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-11-13 15:44:57,305 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.1875) internal successors, (70), 33 states have internal predecessors, (70), 11 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (14), 11 states have call predecessors, (14), 10 states have call successors, (14) Word has length 85 [2024-11-13 15:44:57,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:44:57,306 INFO L225 Difference]: With dead ends: 121 [2024-11-13 15:44:57,306 INFO L226 Difference]: Without dead ends: 95 [2024-11-13 15:44:57,306 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=236, Invalid=1486, Unknown=0, NotChecked=0, Total=1722 [2024-11-13 15:44:57,307 INFO L432 NwaCegarLoop]: 62 mSDtfsCounter, 30 mSDsluCounter, 905 mSDsCounter, 0 mSdLazyCounter, 859 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 967 SdHoareTripleChecker+Invalid, 881 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 859 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2024-11-13 15:44:57,307 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 967 Invalid, 881 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 859 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2024-11-13 15:44:57,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2024-11-13 15:44:57,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 70. [2024-11-13 15:44:57,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 53 states have (on average 1.169811320754717) internal successors, (62), 54 states have internal predecessors, (62), 9 states have call successors, (9), 6 states have call predecessors, (9), 7 states have return successors, (10), 9 states have call predecessors, (10), 8 states have call successors, (10) [2024-11-13 15:44:57,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 81 transitions. [2024-11-13 15:44:57,324 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 81 transitions. Word has length 85 [2024-11-13 15:44:57,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:44:57,325 INFO L471 AbstractCegarLoop]: Abstraction has 70 states and 81 transitions. [2024-11-13 15:44:57,325 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.1875) internal successors, (70), 33 states have internal predecessors, (70), 11 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (14), 11 states have call predecessors, (14), 10 states have call successors, (14) [2024-11-13 15:44:57,325 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 81 transitions. [2024-11-13 15:44:57,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2024-11-13 15:44:57,325 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:44:57,326 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:44:57,342 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2024-11-13 15:44:57,526 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:44:57,526 INFO L396 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:44:57,526 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:44:57,527 INFO L85 PathProgramCache]: Analyzing trace with hash 826266100, now seen corresponding path program 1 times [2024-11-13 15:44:57,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:44:57,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1302312486] [2024-11-13 15:44:57,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:44:57,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:44:57,527 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:44:57,529 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:44:57,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2024-11-13 15:44:57,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:44:57,750 INFO L255 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-11-13 15:44:57,752 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:45:03,181 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-11-13 15:45:03,181 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:45:22,891 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 8 proven. 23 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-13 15:45:22,891 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:45:22,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302312486] [2024-11-13 15:45:22,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302312486] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:45:22,891 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 15:45:22,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 29] total 48 [2024-11-13 15:45:22,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150182127] [2024-11-13 15:45:22,891 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 15:45:22,892 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-11-13 15:45:22,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:45:22,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-11-13 15:45:22,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=2080, Unknown=0, NotChecked=0, Total=2256 [2024-11-13 15:45:22,893 INFO L87 Difference]: Start difference. First operand 70 states and 81 transitions. Second operand has 48 states, 45 states have (on average 1.5777777777777777) internal successors, (71), 43 states have internal predecessors, (71), 11 states have call successors, (14), 2 states have call predecessors, (14), 6 states have return successors, (15), 12 states have call predecessors, (15), 10 states have call successors, (15) [2024-11-13 15:45:42,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:45:42,707 INFO L93 Difference]: Finished difference Result 110 states and 132 transitions. [2024-11-13 15:45:42,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-11-13 15:45:42,708 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 45 states have (on average 1.5777777777777777) internal successors, (71), 43 states have internal predecessors, (71), 11 states have call successors, (14), 2 states have call predecessors, (14), 6 states have return successors, (15), 12 states have call predecessors, (15), 10 states have call successors, (15) Word has length 86 [2024-11-13 15:45:42,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:45:42,709 INFO L225 Difference]: With dead ends: 110 [2024-11-13 15:45:42,709 INFO L226 Difference]: Without dead ends: 101 [2024-11-13 15:45:42,710 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 623 ImplicationChecksByTransitivity, 30.8s TimeCoverageRelationStatistics Valid=296, Invalid=3486, Unknown=0, NotChecked=0, Total=3782 [2024-11-13 15:45:42,710 INFO L432 NwaCegarLoop]: 45 mSDtfsCounter, 19 mSDsluCounter, 1120 mSDsCounter, 0 mSdLazyCounter, 1092 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 1165 SdHoareTripleChecker+Invalid, 1122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1092 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.7s IncrementalHoareTripleChecker+Time [2024-11-13 15:45:42,710 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 1165 Invalid, 1122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1092 Invalid, 0 Unknown, 0 Unchecked, 8.7s Time] [2024-11-13 15:45:42,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2024-11-13 15:45:42,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 85. [2024-11-13 15:45:42,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 64 states have (on average 1.15625) internal successors, (74), 66 states have internal predecessors, (74), 12 states have call successors, (12), 6 states have call predecessors, (12), 8 states have return successors, (16), 12 states have call predecessors, (16), 11 states have call successors, (16) [2024-11-13 15:45:42,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 102 transitions. [2024-11-13 15:45:42,737 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 102 transitions. Word has length 86 [2024-11-13 15:45:42,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:45:42,737 INFO L471 AbstractCegarLoop]: Abstraction has 85 states and 102 transitions. [2024-11-13 15:45:42,737 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 45 states have (on average 1.5777777777777777) internal successors, (71), 43 states have internal predecessors, (71), 11 states have call successors, (14), 2 states have call predecessors, (14), 6 states have return successors, (15), 12 states have call predecessors, (15), 10 states have call successors, (15) [2024-11-13 15:45:42,737 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 102 transitions. [2024-11-13 15:45:42,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2024-11-13 15:45:42,738 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:45:42,738 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:45:42,751 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2024-11-13 15:45:42,938 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:45:42,939 INFO L396 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:45:42,939 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:45:42,939 INFO L85 PathProgramCache]: Analyzing trace with hash 1335739190, now seen corresponding path program 1 times [2024-11-13 15:45:42,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:45:42,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [689438705] [2024-11-13 15:45:42,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:45:42,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:45:42,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:45:42,941 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:45:42,941 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2024-11-13 15:45:43,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:45:43,670 INFO L255 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 54 conjuncts are in the unsatisfiable core [2024-11-13 15:45:43,673 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:45:50,603 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-13 15:45:50,603 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:46:12,912 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 8 proven. 23 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-13 15:46:12,912 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:46:12,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689438705] [2024-11-13 15:46:12,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689438705] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:46:12,912 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 15:46:12,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 55 [2024-11-13 15:46:12,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268874714] [2024-11-13 15:46:12,912 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 15:46:12,913 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2024-11-13 15:46:12,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:46:12,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2024-11-13 15:46:12,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=2684, Unknown=0, NotChecked=0, Total=2970 [2024-11-13 15:46:12,913 INFO L87 Difference]: Start difference. First operand 85 states and 102 transitions. Second operand has 55 states, 52 states have (on average 1.5) internal successors, (78), 50 states have internal predecessors, (78), 12 states have call successors, (15), 2 states have call predecessors, (15), 6 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) [2024-11-13 15:46:38,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:46:38,276 INFO L93 Difference]: Finished difference Result 117 states and 139 transitions. [2024-11-13 15:46:38,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2024-11-13 15:46:38,277 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 52 states have (on average 1.5) internal successors, (78), 50 states have internal predecessors, (78), 12 states have call successors, (15), 2 states have call predecessors, (15), 6 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) Word has length 86 [2024-11-13 15:46:38,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:46:38,278 INFO L225 Difference]: With dead ends: 117 [2024-11-13 15:46:38,278 INFO L226 Difference]: Without dead ends: 104 [2024-11-13 15:46:38,278 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 773 ImplicationChecksByTransitivity, 36.9s TimeCoverageRelationStatistics Valid=475, Invalid=5225, Unknown=0, NotChecked=0, Total=5700 [2024-11-13 15:46:38,279 INFO L432 NwaCegarLoop]: 52 mSDtfsCounter, 41 mSDsluCounter, 1516 mSDsCounter, 0 mSdLazyCounter, 1950 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 1568 SdHoareTripleChecker+Invalid, 2002 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1950 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.0s IncrementalHoareTripleChecker+Time [2024-11-13 15:46:38,279 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 1568 Invalid, 2002 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1950 Invalid, 0 Unknown, 0 Unchecked, 12.0s Time] [2024-11-13 15:46:38,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2024-11-13 15:46:38,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 92. [2024-11-13 15:46:38,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 70 states have (on average 1.1428571428571428) internal successors, (80), 72 states have internal predecessors, (80), 13 states have call successors, (13), 7 states have call predecessors, (13), 8 states have return successors, (16), 12 states have call predecessors, (16), 12 states have call successors, (16) [2024-11-13 15:46:38,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 109 transitions. [2024-11-13 15:46:38,321 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 109 transitions. Word has length 86 [2024-11-13 15:46:38,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:46:38,322 INFO L471 AbstractCegarLoop]: Abstraction has 92 states and 109 transitions. [2024-11-13 15:46:38,322 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 52 states have (on average 1.5) internal successors, (78), 50 states have internal predecessors, (78), 12 states have call successors, (15), 2 states have call predecessors, (15), 6 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) [2024-11-13 15:46:38,322 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 109 transitions. [2024-11-13 15:46:38,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2024-11-13 15:46:38,323 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:46:38,323 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:46:38,344 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2024-11-13 15:46:38,523 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:46:38,523 INFO L396 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:46:38,523 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:46:38,524 INFO L85 PathProgramCache]: Analyzing trace with hash -1106917880, now seen corresponding path program 1 times [2024-11-13 15:46:38,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:46:38,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1957216565] [2024-11-13 15:46:38,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:46:38,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:46:38,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:46:38,525 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:46:38,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2024-11-13 15:46:38,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:46:38,757 INFO L255 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-13 15:46:38,758 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:46:40,725 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-13 15:46:40,726 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:46:46,131 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 13 proven. 8 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-11-13 15:46:46,131 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:46:46,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957216565] [2024-11-13 15:46:46,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957216565] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:46:46,131 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 15:46:46,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 29 [2024-11-13 15:46:46,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168643530] [2024-11-13 15:46:46,132 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 15:46:46,132 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-13 15:46:46,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:46:46,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-13 15:46:46,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=687, Unknown=0, NotChecked=0, Total=812 [2024-11-13 15:46:46,133 INFO L87 Difference]: Start difference. First operand 92 states and 109 transitions. Second operand has 29 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 29 states have internal predecessors, (68), 11 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (14), 11 states have call predecessors, (14), 10 states have call successors, (14) [2024-11-13 15:46:51,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:46:51,705 INFO L93 Difference]: Finished difference Result 115 states and 132 transitions. [2024-11-13 15:46:51,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-13 15:46:51,707 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 29 states have internal predecessors, (68), 11 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (14), 11 states have call predecessors, (14), 10 states have call successors, (14) Word has length 87 [2024-11-13 15:46:51,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:46:51,708 INFO L225 Difference]: With dead ends: 115 [2024-11-13 15:46:51,708 INFO L226 Difference]: Without dead ends: 81 [2024-11-13 15:46:51,708 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=229, Invalid=1177, Unknown=0, NotChecked=0, Total=1406 [2024-11-13 15:46:51,709 INFO L432 NwaCegarLoop]: 63 mSDtfsCounter, 31 mSDsluCounter, 819 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 882 SdHoareTripleChecker+Invalid, 639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2024-11-13 15:46:51,709 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 882 Invalid, 639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 610 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2024-11-13 15:46:51,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2024-11-13 15:46:51,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 77. [2024-11-13 15:46:51,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 58 states have (on average 1.1379310344827587) internal successors, (66), 61 states have internal predecessors, (66), 11 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (12), 9 states have call predecessors, (12), 10 states have call successors, (12) [2024-11-13 15:46:51,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 89 transitions. [2024-11-13 15:46:51,740 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 89 transitions. Word has length 87 [2024-11-13 15:46:51,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:46:51,740 INFO L471 AbstractCegarLoop]: Abstraction has 77 states and 89 transitions. [2024-11-13 15:46:51,740 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 29 states have internal predecessors, (68), 11 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (14), 11 states have call predecessors, (14), 10 states have call successors, (14) [2024-11-13 15:46:51,740 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 89 transitions. [2024-11-13 15:46:51,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2024-11-13 15:46:51,741 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:46:51,741 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:46:51,754 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2024-11-13 15:46:51,941 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:46:51,941 INFO L396 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:46:51,942 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:46:51,942 INFO L85 PathProgramCache]: Analyzing trace with hash -596733492, now seen corresponding path program 2 times [2024-11-13 15:46:51,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:46:51,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1832348959] [2024-11-13 15:46:51,942 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 15:46:51,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:46:51,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:46:51,944 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:46:51,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2024-11-13 15:46:52,171 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 15:46:52,171 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 15:46:52,174 INFO L255 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-13 15:46:52,175 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:46:54,132 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-13 15:46:54,132 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:46:59,636 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 13 proven. 8 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-11-13 15:46:59,636 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:46:59,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832348959] [2024-11-13 15:46:59,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832348959] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:46:59,636 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 15:46:59,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 29 [2024-11-13 15:46:59,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036760945] [2024-11-13 15:46:59,637 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 15:46:59,637 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-13 15:46:59,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:46:59,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-13 15:46:59,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=681, Unknown=0, NotChecked=0, Total=812 [2024-11-13 15:46:59,638 INFO L87 Difference]: Start difference. First operand 77 states and 89 transitions. Second operand has 29 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 29 states have internal predecessors, (68), 11 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (14), 11 states have call predecessors, (14), 10 states have call successors, (14) [2024-11-13 15:47:04,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:47:04,500 INFO L93 Difference]: Finished difference Result 99 states and 112 transitions. [2024-11-13 15:47:04,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-13 15:47:04,501 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 29 states have internal predecessors, (68), 11 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (14), 11 states have call predecessors, (14), 10 states have call successors, (14) Word has length 87 [2024-11-13 15:47:04,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:47:04,502 INFO L225 Difference]: With dead ends: 99 [2024-11-13 15:47:04,502 INFO L226 Difference]: Without dead ends: 81 [2024-11-13 15:47:04,502 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=241, Invalid=1165, Unknown=0, NotChecked=0, Total=1406 [2024-11-13 15:47:04,503 INFO L432 NwaCegarLoop]: 58 mSDtfsCounter, 22 mSDsluCounter, 774 mSDsCounter, 0 mSdLazyCounter, 498 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 832 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2024-11-13 15:47:04,503 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 832 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 498 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2024-11-13 15:47:04,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2024-11-13 15:47:04,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 72. [2024-11-13 15:47:04,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 55 states have (on average 1.1272727272727272) internal successors, (62), 57 states have internal predecessors, (62), 10 states have call successors, (10), 5 states have call predecessors, (10), 6 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) [2024-11-13 15:47:04,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 83 transitions. [2024-11-13 15:47:04,524 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 83 transitions. Word has length 87 [2024-11-13 15:47:04,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:47:04,524 INFO L471 AbstractCegarLoop]: Abstraction has 72 states and 83 transitions. [2024-11-13 15:47:04,524 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 29 states have internal predecessors, (68), 11 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (14), 11 states have call predecessors, (14), 10 states have call successors, (14) [2024-11-13 15:47:04,524 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 83 transitions. [2024-11-13 15:47:04,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2024-11-13 15:47:04,524 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:47:04,525 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:47:04,539 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2024-11-13 15:47:04,725 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:47:04,725 INFO L396 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:47:04,725 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:47:04,725 INFO L85 PathProgramCache]: Analyzing trace with hash 1992687704, now seen corresponding path program 1 times [2024-11-13 15:47:04,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:47:04,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1211238269] [2024-11-13 15:47:04,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:47:04,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:47:04,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:47:04,727 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:47:04,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2024-11-13 15:47:05,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:47:05,501 INFO L255 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 53 conjuncts are in the unsatisfiable core [2024-11-13 15:47:05,503 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:47:10,689 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-13 15:47:10,689 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:47:26,077 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-11-13 15:47:26,078 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:47:26,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211238269] [2024-11-13 15:47:26,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211238269] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:47:26,078 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 15:47:26,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 49 [2024-11-13 15:47:26,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861102020] [2024-11-13 15:47:26,078 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 15:47:26,079 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-11-13 15:47:26,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:47:26,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-11-13 15:47:26,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=2164, Unknown=0, NotChecked=0, Total=2352 [2024-11-13 15:47:26,079 INFO L87 Difference]: Start difference. First operand 72 states and 83 transitions. Second operand has 49 states, 47 states have (on average 1.6170212765957446) internal successors, (76), 45 states have internal predecessors, (76), 12 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) [2024-11-13 15:47:33,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:47:33,444 INFO L93 Difference]: Finished difference Result 75 states and 86 transitions. [2024-11-13 15:47:33,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-13 15:47:33,446 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 47 states have (on average 1.6170212765957446) internal successors, (76), 45 states have internal predecessors, (76), 12 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) Word has length 88 [2024-11-13 15:47:33,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:47:33,446 INFO L225 Difference]: With dead ends: 75 [2024-11-13 15:47:33,446 INFO L226 Difference]: Without dead ends: 0 [2024-11-13 15:47:33,447 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 18.0s TimeCoverageRelationStatistics Valid=212, Invalid=2544, Unknown=0, NotChecked=0, Total=2756 [2024-11-13 15:47:33,447 INFO L432 NwaCegarLoop]: 45 mSDtfsCounter, 4 mSDsluCounter, 1205 mSDsCounter, 0 mSdLazyCounter, 982 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 1250 SdHoareTripleChecker+Invalid, 983 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 982 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2024-11-13 15:47:33,447 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 1250 Invalid, 983 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 982 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2024-11-13 15:47:33,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-11-13 15:47:33,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-11-13 15:47:33,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:47:33,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-11-13 15:47:33,448 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 88 [2024-11-13 15:47:33,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:47:33,448 INFO L471 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-11-13 15:47:33,448 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 47 states have (on average 1.6170212765957446) internal successors, (76), 45 states have internal predecessors, (76), 12 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) [2024-11-13 15:47:33,448 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-11-13 15:47:33,448 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-11-13 15:47:33,451 INFO L782 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-11-13 15:47:33,472 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2024-11-13 15:47:33,652 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23498b9a-7e35-4dcc-9f1b-e2881d99462b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:47:33,654 INFO L407 BasicCegarLoop]: Path program histogram: [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:47:33,656 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2024-11-13 15:47:45,106 WARN L286 SmtUtils]: Spent 10.66s on a formula simplification. DAG size of input: 488 DAG size of output: 564 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.proofs.floydhoare.HoareAnnotationComposer.or) [2024-11-13 15:47:54,052 WARN L286 SmtUtils]: Spent 8.94s on a formula simplification. DAG size of input: 401 DAG size of output: 405 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.proofs.floydhoare.HoareAnnotationComposer.or) [2024-11-13 15:48:10,812 WARN L286 SmtUtils]: Spent 12.75s on a formula simplification. DAG size of input: 492 DAG size of output: 574 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.proofs.floydhoare.HoareAnnotationComposer.or)