./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/verifythis/prefixsum_rec.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 826ab2ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/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_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/verifythis/prefixsum_rec.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 81bdf17d0130e934dcb31a2f76f595e947b99d6273334b7f05365a624466aeab --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-13 16:07:53,337 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-13 16:07:53,423 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-13 16:07:53,434 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-13 16:07:53,435 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-13 16:07:53,474 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-13 16:07:53,475 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-13 16:07:53,475 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-13 16:07:53,475 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-13 16:07:53,475 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-13 16:07:53,477 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-13 16:07:53,477 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-13 16:07:53,478 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-13 16:07:53,478 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-13 16:07:53,479 INFO L153 SettingsManager]: * Use SBE=true [2024-11-13 16:07:53,479 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-13 16:07:53,480 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-13 16:07:53,480 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-13 16:07:53,480 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-13 16:07:53,480 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-13 16:07:53,480 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-13 16:07:53,481 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-13 16:07:53,481 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-13 16:07:53,481 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-13 16:07:53,481 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-13 16:07:53,481 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-13 16:07:53,481 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-13 16:07:53,481 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-13 16:07:53,482 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-13 16:07:53,482 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-13 16:07:53,482 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-13 16:07:53,482 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-13 16:07:53,483 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-13 16:07:53,483 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-13 16:07:53,483 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-13 16:07:53,483 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-13 16:07:53,483 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-13 16:07:53,484 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-13 16:07:53,484 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-13 16:07:53,484 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-13 16:07:53,484 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-13 16:07:53,485 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-13 16:07:53,485 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_c248d061-6f15-444d-91f6-16fb11eb4d54/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 valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) 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 -> 81bdf17d0130e934dcb31a2f76f595e947b99d6273334b7f05365a624466aeab [2024-11-13 16:07:53,863 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-13 16:07:53,875 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-13 16:07:53,879 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-13 16:07:53,881 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-13 16:07:53,881 INFO L274 PluginConnector]: CDTParser initialized [2024-11-13 16:07:53,884 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/../../sv-benchmarks/c/verifythis/prefixsum_rec.c Unable to find full path for "g++" [2024-11-13 16:07:55,779 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-13 16:07:56,029 INFO L384 CDTParser]: Found 1 translation units. [2024-11-13 16:07:56,030 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/sv-benchmarks/c/verifythis/prefixsum_rec.c [2024-11-13 16:07:56,044 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/data/c9b4e55e3/96b60d0430ca43b7970fa292c48c33ca/FLAGfbfc41c7c [2024-11-13 16:07:56,059 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/data/c9b4e55e3/96b60d0430ca43b7970fa292c48c33ca [2024-11-13 16:07:56,061 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-13 16:07:56,063 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-13 16:07:56,064 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-13 16:07:56,065 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-13 16:07:56,069 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-13 16:07:56,070 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 04:07:56" (1/1) ... [2024-11-13 16:07:56,071 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@476e0ad6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:07:56, skipping insertion in model container [2024-11-13 16:07:56,071 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 04:07:56" (1/1) ... [2024-11-13 16:07:56,087 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-13 16:07:56,288 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 16:07:56,303 INFO L200 MainTranslator]: Completed pre-run [2024-11-13 16:07:56,329 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 16:07:56,344 INFO L204 MainTranslator]: Completed translation [2024-11-13 16:07:56,345 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:07:56 WrapperNode [2024-11-13 16:07:56,345 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-13 16:07:56,346 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-13 16:07:56,347 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-13 16:07:56,347 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-13 16:07:56,354 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:07:56" (1/1) ... [2024-11-13 16:07:56,363 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:07:56" (1/1) ... [2024-11-13 16:07:56,384 INFO L138 Inliner]: procedures = 22, calls = 38, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 80 [2024-11-13 16:07:56,386 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-13 16:07:56,387 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-13 16:07:56,387 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-13 16:07:56,387 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-13 16:07:56,399 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:07:56" (1/1) ... [2024-11-13 16:07:56,399 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:07:56" (1/1) ... [2024-11-13 16:07:56,406 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:07:56" (1/1) ... [2024-11-13 16:07:56,437 INFO L175 MemorySlicer]: Split 16 memory accesses to 2 slices as follows [2, 14]. 88 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 6 writes are split as follows [0, 6]. [2024-11-13 16:07:56,441 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:07:56" (1/1) ... [2024-11-13 16:07:56,441 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:07:56" (1/1) ... [2024-11-13 16:07:56,454 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:07:56" (1/1) ... [2024-11-13 16:07:56,461 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:07:56" (1/1) ... [2024-11-13 16:07:56,462 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:07:56" (1/1) ... [2024-11-13 16:07:56,468 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:07:56" (1/1) ... [2024-11-13 16:07:56,472 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-13 16:07:56,472 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-13 16:07:56,473 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-13 16:07:56,473 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-13 16:07:56,478 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:07:56" (1/1) ... [2024-11-13 16:07:56,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-13 16:07:56,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:07:56,511 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-13 16:07:56,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-13 16:07:56,550 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-13 16:07:56,550 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-13 16:07:56,550 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-13 16:07:56,550 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-13 16:07:56,550 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-13 16:07:56,550 INFO L130 BoogieDeclarations]: Found specification of procedure downsweep [2024-11-13 16:07:56,551 INFO L138 BoogieDeclarations]: Found implementation of procedure downsweep [2024-11-13 16:07:56,551 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-13 16:07:56,551 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-13 16:07:56,551 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-13 16:07:56,551 INFO L130 BoogieDeclarations]: Found specification of procedure upsweep [2024-11-13 16:07:56,551 INFO L138 BoogieDeclarations]: Found implementation of procedure upsweep [2024-11-13 16:07:56,551 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-13 16:07:56,551 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-13 16:07:56,552 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-13 16:07:56,552 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-13 16:07:56,552 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2024-11-13 16:07:56,552 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2024-11-13 16:07:56,552 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-13 16:07:56,658 INFO L238 CfgBuilder]: Building ICFG [2024-11-13 16:07:56,659 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-13 16:07:57,185 INFO L? ?]: Removed 103 outVars from TransFormulas that were not future-live. [2024-11-13 16:07:57,185 INFO L287 CfgBuilder]: Performing block encoding [2024-11-13 16:07:57,200 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-13 16:07:57,201 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-13 16:07:57,201 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 04:07:57 BoogieIcfgContainer [2024-11-13 16:07:57,201 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-13 16:07:57,204 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-13 16:07:57,205 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-13 16:07:57,211 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-13 16:07:57,211 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 04:07:56" (1/3) ... [2024-11-13 16:07:57,212 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6967db97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 04:07:57, skipping insertion in model container [2024-11-13 16:07:57,212 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:07:56" (2/3) ... [2024-11-13 16:07:57,212 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6967db97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 04:07:57, skipping insertion in model container [2024-11-13 16:07:57,212 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 04:07:57" (3/3) ... [2024-11-13 16:07:57,214 INFO L112 eAbstractionObserver]: Analyzing ICFG prefixsum_rec.c [2024-11-13 16:07:57,230 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-13 16:07:57,232 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG prefixsum_rec.c that has 5 procedures, 106 locations, 1 initial locations, 3 loop locations, and 34 error locations. [2024-11-13 16:07:57,275 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-13 16:07:57,290 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=None, 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;@7e68a8ba, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-13 16:07:57,291 INFO L334 AbstractCegarLoop]: Starting to check reachability of 34 error locations. [2024-11-13 16:07:57,294 INFO L276 IsEmpty]: Start isEmpty. Operand has 106 states, 57 states have (on average 1.7719298245614035) internal successors, (101), 91 states have internal predecessors, (101), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-13 16:07:57,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-13 16:07:57,301 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:07:57,302 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:07:57,303 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-13 16:07:57,307 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:07:57,308 INFO L85 PathProgramCache]: Analyzing trace with hash 479200434, now seen corresponding path program 1 times [2024-11-13 16:07:57,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:07:57,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540780820] [2024-11-13 16:07:57,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:07:57,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:07:57,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:07:57,509 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 16:07:57,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:07:57,525 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-11-13 16:07:57,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:07:57,550 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-11-13 16:07:57,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:07:57,568 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-11-13 16:07:57,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:07:57,594 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-13 16:07:57,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:07:57,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540780820] [2024-11-13 16:07:57,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540780820] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 16:07:57,595 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 16:07:57,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 16:07:57,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326902104] [2024-11-13 16:07:57,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 16:07:57,610 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 16:07:57,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:07:57,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 16:07:57,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 16:07:57,639 INFO L87 Difference]: Start difference. First operand has 106 states, 57 states have (on average 1.7719298245614035) internal successors, (101), 91 states have internal predecessors, (101), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-13 16:07:57,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:07:57,805 INFO L93 Difference]: Finished difference Result 114 states and 124 transitions. [2024-11-13 16:07:57,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 16:07:57,808 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2024-11-13 16:07:57,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:07:57,814 INFO L225 Difference]: With dead ends: 114 [2024-11-13 16:07:57,815 INFO L226 Difference]: Without dead ends: 112 [2024-11-13 16:07:57,816 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 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 16:07:57,821 INFO L432 NwaCegarLoop]: 104 mSDtfsCounter, 27 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 16:07:57,821 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 176 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 16:07:57,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2024-11-13 16:07:57,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 103. [2024-11-13 16:07:57,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 55 states have (on average 1.690909090909091) internal successors, (93), 88 states have internal predecessors, (93), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-13 16:07:57,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 113 transitions. [2024-11-13 16:07:57,859 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 113 transitions. Word has length 29 [2024-11-13 16:07:57,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:07:57,859 INFO L471 AbstractCegarLoop]: Abstraction has 103 states and 113 transitions. [2024-11-13 16:07:57,859 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-13 16:07:57,860 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 113 transitions. [2024-11-13 16:07:57,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-13 16:07:57,861 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:07:57,861 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:07:57,861 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-13 16:07:57,862 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-13 16:07:57,862 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:07:57,862 INFO L85 PathProgramCache]: Analyzing trace with hash -401319310, now seen corresponding path program 1 times [2024-11-13 16:07:57,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:07:57,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52174885] [2024-11-13 16:07:57,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:07:57,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:07:57,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:07:58,292 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 16:07:58,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:07:58,301 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-11-13 16:07:58,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:07:58,323 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-11-13 16:07:58,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:07:58,343 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-11-13 16:07:58,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:07:58,358 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-13 16:07:58,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:07:58,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52174885] [2024-11-13 16:07:58,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52174885] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 16:07:58,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 16:07:58,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-13 16:07:58,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435739057] [2024-11-13 16:07:58,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 16:07:58,361 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 16:07:58,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:07:58,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 16:07:58,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-13 16:07:58,363 INFO L87 Difference]: Start difference. First operand 103 states and 113 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-13 16:07:58,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:07:58,630 INFO L93 Difference]: Finished difference Result 109 states and 119 transitions. [2024-11-13 16:07:58,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 16:07:58,631 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 29 [2024-11-13 16:07:58,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:07:58,632 INFO L225 Difference]: With dead ends: 109 [2024-11-13 16:07:58,632 INFO L226 Difference]: Without dead ends: 109 [2024-11-13 16:07:58,633 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-13 16:07:58,634 INFO L432 NwaCegarLoop]: 84 mSDtfsCounter, 53 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-13 16:07:58,634 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 241 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-13 16:07:58,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2024-11-13 16:07:58,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 100. [2024-11-13 16:07:58,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 55 states have (on average 1.6363636363636365) internal successors, (90), 85 states have internal predecessors, (90), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-13 16:07:58,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 110 transitions. [2024-11-13 16:07:58,658 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 110 transitions. Word has length 29 [2024-11-13 16:07:58,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:07:58,660 INFO L471 AbstractCegarLoop]: Abstraction has 100 states and 110 transitions. [2024-11-13 16:07:58,661 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-13 16:07:58,661 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 110 transitions. [2024-11-13 16:07:58,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-13 16:07:58,662 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:07:58,662 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:07:58,662 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-13 16:07:58,662 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-13 16:07:58,664 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:07:58,664 INFO L85 PathProgramCache]: Analyzing trace with hash -401319309, now seen corresponding path program 1 times [2024-11-13 16:07:58,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:07:58,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890366350] [2024-11-13 16:07:58,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:07:58,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:07:58,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:07:59,690 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 16:07:59,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:07:59,701 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-11-13 16:07:59,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:07:59,725 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-11-13 16:07:59,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:07:59,746 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-11-13 16:07:59,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:07:59,763 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-13 16:07:59,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:07:59,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890366350] [2024-11-13 16:07:59,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890366350] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 16:07:59,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 16:07:59,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-11-13 16:07:59,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240277023] [2024-11-13 16:07:59,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 16:07:59,764 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-13 16:07:59,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:07:59,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-13 16:07:59,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-11-13 16:07:59,768 INFO L87 Difference]: Start difference. First operand 100 states and 110 transitions. Second operand has 11 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-13 16:08:00,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:08:00,678 INFO L93 Difference]: Finished difference Result 134 states and 154 transitions. [2024-11-13 16:08:00,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-13 16:08:00,682 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 29 [2024-11-13 16:08:00,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:08:00,683 INFO L225 Difference]: With dead ends: 134 [2024-11-13 16:08:00,683 INFO L226 Difference]: Without dead ends: 134 [2024-11-13 16:08:00,684 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2024-11-13 16:08:00,685 INFO L432 NwaCegarLoop]: 87 mSDtfsCounter, 95 mSDsluCounter, 522 mSDsCounter, 0 mSdLazyCounter, 383 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 609 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-13 16:08:00,685 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 609 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 383 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-13 16:08:00,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2024-11-13 16:08:00,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 111. [2024-11-13 16:08:00,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 63 states have (on average 1.5873015873015872) internal successors, (100), 93 states have internal predecessors, (100), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-11-13 16:08:00,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 126 transitions. [2024-11-13 16:08:00,702 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 126 transitions. Word has length 29 [2024-11-13 16:08:00,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:08:00,703 INFO L471 AbstractCegarLoop]: Abstraction has 111 states and 126 transitions. [2024-11-13 16:08:00,703 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-13 16:08:00,703 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 126 transitions. [2024-11-13 16:08:00,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-13 16:08:00,704 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:08:00,704 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:08:00,704 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-13 16:08:00,704 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-13 16:08:00,705 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:08:00,705 INFO L85 PathProgramCache]: Analyzing trace with hash 444003341, now seen corresponding path program 1 times [2024-11-13 16:08:00,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:08:00,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746977939] [2024-11-13 16:08:00,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:08:00,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:08:00,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:08:00,790 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 16:08:00,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:08:00,793 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-11-13 16:08:00,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:08:00,802 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-11-13 16:08:00,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:08:00,805 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-11-13 16:08:00,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:08:00,810 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-13 16:08:00,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:08:00,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746977939] [2024-11-13 16:08:00,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746977939] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 16:08:00,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 16:08:00,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-13 16:08:00,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363255520] [2024-11-13 16:08:00,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 16:08:00,812 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 16:08:00,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:08:00,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 16:08:00,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-13 16:08:00,812 INFO L87 Difference]: Start difference. First operand 111 states and 126 transitions. Second operand has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-13 16:08:00,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:08:00,972 INFO L93 Difference]: Finished difference Result 119 states and 134 transitions. [2024-11-13 16:08:00,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 16:08:00,973 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2024-11-13 16:08:00,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:08:00,974 INFO L225 Difference]: With dead ends: 119 [2024-11-13 16:08:00,974 INFO L226 Difference]: Without dead ends: 119 [2024-11-13 16:08:00,974 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-13 16:08:00,975 INFO L432 NwaCegarLoop]: 87 mSDtfsCounter, 53 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 16:08:00,975 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 251 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 16:08:00,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2024-11-13 16:08:00,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 110. [2024-11-13 16:08:00,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 63 states have (on average 1.5714285714285714) internal successors, (99), 92 states have internal predecessors, (99), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-11-13 16:08:00,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 125 transitions. [2024-11-13 16:08:00,991 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 125 transitions. Word has length 30 [2024-11-13 16:08:00,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:08:00,992 INFO L471 AbstractCegarLoop]: Abstraction has 110 states and 125 transitions. [2024-11-13 16:08:00,992 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-13 16:08:00,992 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 125 transitions. [2024-11-13 16:08:00,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-13 16:08:00,996 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:08:00,996 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:08:00,996 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-13 16:08:00,997 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-13 16:08:00,997 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:08:00,997 INFO L85 PathProgramCache]: Analyzing trace with hash 444003342, now seen corresponding path program 1 times [2024-11-13 16:08:00,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:08:00,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927365573] [2024-11-13 16:08:00,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:08:00,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:08:01,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:08:01,385 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 16:08:01,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:08:01,389 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-11-13 16:08:01,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:08:01,405 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-11-13 16:08:01,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:08:01,416 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-11-13 16:08:01,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:08:01,427 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-13 16:08:01,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:08:01,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927365573] [2024-11-13 16:08:01,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927365573] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 16:08:01,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 16:08:01,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-13 16:08:01,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912621369] [2024-11-13 16:08:01,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 16:08:01,428 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-13 16:08:01,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:08:01,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-13 16:08:01,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-11-13 16:08:01,430 INFO L87 Difference]: Start difference. First operand 110 states and 125 transitions. Second operand has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-13 16:08:01,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:08:01,798 INFO L93 Difference]: Finished difference Result 123 states and 140 transitions. [2024-11-13 16:08:01,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-13 16:08:01,798 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 30 [2024-11-13 16:08:01,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:08:01,800 INFO L225 Difference]: With dead ends: 123 [2024-11-13 16:08:01,800 INFO L226 Difference]: Without dead ends: 123 [2024-11-13 16:08:01,800 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-11-13 16:08:01,801 INFO L432 NwaCegarLoop]: 90 mSDtfsCounter, 33 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-13 16:08:01,801 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 368 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-13 16:08:01,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2024-11-13 16:08:01,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 113. [2024-11-13 16:08:01,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 66 states have (on average 1.5757575757575757) internal successors, (104), 95 states have internal predecessors, (104), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-11-13 16:08:01,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 130 transitions. [2024-11-13 16:08:01,810 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 130 transitions. Word has length 30 [2024-11-13 16:08:01,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:08:01,811 INFO L471 AbstractCegarLoop]: Abstraction has 113 states and 130 transitions. [2024-11-13 16:08:01,811 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-13 16:08:01,811 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 130 transitions. [2024-11-13 16:08:01,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-13 16:08:01,812 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:08:01,812 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:08:01,812 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-13 16:08:01,813 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-13 16:08:01,813 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:08:01,813 INFO L85 PathProgramCache]: Analyzing trace with hash -998453660, now seen corresponding path program 1 times [2024-11-13 16:08:01,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:08:01,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851173972] [2024-11-13 16:08:01,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:08:01,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:08:01,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:08:02,723 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 16:08:02,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:08:02,732 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-11-13 16:08:02,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:08:02,755 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-13 16:08:02,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:08:02,768 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-11-13 16:08:02,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:08:02,776 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-13 16:08:02,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:08:02,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851173972] [2024-11-13 16:08:02,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851173972] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:08:02,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094484296] [2024-11-13 16:08:02,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:08:02,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:08:02,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:08:02,782 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:08:02,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-13 16:08:02,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:08:02,877 INFO L255 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-13 16:08:02,890 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:08:03,053 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-13 16:08:03,066 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-11-13 16:08:03,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 16:08:03,481 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 32 [2024-11-13 16:08:03,493 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-13 16:08:03,493 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-13 16:08:03,927 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-13 16:08:03,927 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:08:04,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094484296] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:08:04,197 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 16:08:04,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 19 [2024-11-13 16:08:04,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114615946] [2024-11-13 16:08:04,197 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 16:08:04,198 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-13 16:08:04,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:08:04,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-13 16:08:04,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2024-11-13 16:08:04,201 INFO L87 Difference]: Start difference. First operand 113 states and 130 transitions. Second operand has 20 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-13 16:08:05,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:08:05,944 INFO L93 Difference]: Finished difference Result 122 states and 136 transitions. [2024-11-13 16:08:05,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-13 16:08:05,945 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) Word has length 30 [2024-11-13 16:08:05,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:08:05,946 INFO L225 Difference]: With dead ends: 122 [2024-11-13 16:08:05,946 INFO L226 Difference]: Without dead ends: 122 [2024-11-13 16:08:05,947 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=177, Invalid=945, Unknown=0, NotChecked=0, Total=1122 [2024-11-13 16:08:05,948 INFO L432 NwaCegarLoop]: 48 mSDtfsCounter, 264 mSDsluCounter, 498 mSDsCounter, 0 mSdLazyCounter, 810 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 546 SdHoareTripleChecker+Invalid, 857 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 810 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-13 16:08:05,950 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [264 Valid, 546 Invalid, 857 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 810 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-13 16:08:05,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2024-11-13 16:08:05,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 101. [2024-11-13 16:08:05,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 58 states have (on average 1.5689655172413792) internal successors, (91), 86 states have internal predecessors, (91), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-13 16:08:05,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 111 transitions. [2024-11-13 16:08:05,960 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 111 transitions. Word has length 30 [2024-11-13 16:08:05,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:08:05,961 INFO L471 AbstractCegarLoop]: Abstraction has 101 states and 111 transitions. [2024-11-13 16:08:05,961 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-13 16:08:05,961 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 111 transitions. [2024-11-13 16:08:05,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-13 16:08:05,962 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:08:05,962 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:08:05,983 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-13 16:08:06,166 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-13 16:08:06,166 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-13 16:08:06,167 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:08:06,167 INFO L85 PathProgramCache]: Analyzing trace with hash -1195674633, now seen corresponding path program 1 times [2024-11-13 16:08:06,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:08:06,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930057778] [2024-11-13 16:08:06,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:08:06,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:08:06,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:08:06,410 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 16:08:06,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:08:06,414 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-11-13 16:08:06,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:08:06,457 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-11-13 16:08:06,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:08:06,461 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-11-13 16:08:06,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:08:06,467 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-13 16:08:06,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:08:06,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930057778] [2024-11-13 16:08:06,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930057778] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:08:06,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886218764] [2024-11-13 16:08:06,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:08:06,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:08:06,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:08:06,470 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:08:06,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-13 16:08:06,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:08:06,563 INFO L255 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-13 16:08:06,566 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:08:06,629 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-13 16:08:06,643 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-13 16:08:06,893 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-13 16:08:06,893 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2024-11-13 16:08:06,910 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-13 16:08:06,910 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-13 16:08:07,307 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 16:08:07,307 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:08:07,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886218764] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:08:07,789 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 16:08:07,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2024-11-13 16:08:07,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647591747] [2024-11-13 16:08:07,789 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 16:08:07,790 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-13 16:08:07,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:08:07,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-13 16:08:07,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2024-11-13 16:08:07,791 INFO L87 Difference]: Start difference. First operand 101 states and 111 transitions. Second operand has 20 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 7 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 5 states have call predecessors, (8), 7 states have call successors, (8) [2024-11-13 16:08:09,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:08:09,090 INFO L93 Difference]: Finished difference Result 119 states and 131 transitions. [2024-11-13 16:08:09,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-13 16:08:09,091 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 7 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 5 states have call predecessors, (8), 7 states have call successors, (8) Word has length 33 [2024-11-13 16:08:09,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:08:09,092 INFO L225 Difference]: With dead ends: 119 [2024-11-13 16:08:09,092 INFO L226 Difference]: Without dead ends: 116 [2024-11-13 16:08:09,093 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=198, Invalid=1134, Unknown=0, NotChecked=0, Total=1332 [2024-11-13 16:08:09,094 INFO L432 NwaCegarLoop]: 47 mSDtfsCounter, 253 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 791 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 515 SdHoareTripleChecker+Invalid, 835 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 791 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-13 16:08:09,094 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [253 Valid, 515 Invalid, 835 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 791 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-13 16:08:09,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2024-11-13 16:08:09,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 105. [2024-11-13 16:08:09,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 62 states have (on average 1.532258064516129) internal successors, (95), 90 states have internal predecessors, (95), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-13 16:08:09,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 115 transitions. [2024-11-13 16:08:09,102 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 115 transitions. Word has length 33 [2024-11-13 16:08:09,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:08:09,102 INFO L471 AbstractCegarLoop]: Abstraction has 105 states and 115 transitions. [2024-11-13 16:08:09,102 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 7 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 5 states have call predecessors, (8), 7 states have call successors, (8) [2024-11-13 16:08:09,103 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 115 transitions. [2024-11-13 16:08:09,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-13 16:08:09,103 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:08:09,104 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:08:09,128 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-13 16:08:09,308 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:08:09,308 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-13 16:08:09,308 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:08:09,309 INFO L85 PathProgramCache]: Analyzing trace with hash -606444103, now seen corresponding path program 1 times [2024-11-13 16:08:09,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:08:09,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396149251] [2024-11-13 16:08:09,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:08:09,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:08:09,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:08:09,693 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 16:08:09,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:08:09,696 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-11-13 16:08:09,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:08:09,711 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-13 16:08:09,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:08:09,717 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-11-13 16:08:09,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:08:09,726 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-13 16:08:09,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:08:09,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396149251] [2024-11-13 16:08:09,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396149251] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:08:09,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934954666] [2024-11-13 16:08:09,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:08:09,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:08:09,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:08:09,729 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:08:09,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-13 16:08:09,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:08:09,813 INFO L255 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-13 16:08:09,815 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:08:09,821 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-13 16:08:09,972 INFO L349 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2024-11-13 16:08:09,972 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2024-11-13 16:08:10,471 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-13 16:08:10,471 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:08:10,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934954666] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:08:10,868 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 16:08:10,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2024-11-13 16:08:10,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678787643] [2024-11-13 16:08:10,869 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 16:08:10,869 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-13 16:08:10,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:08:10,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-13 16:08:10,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2024-11-13 16:08:10,870 INFO L87 Difference]: Start difference. First operand 105 states and 115 transitions. Second operand has 15 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 5 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-13 16:08:11,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:08:11,823 INFO L93 Difference]: Finished difference Result 113 states and 123 transitions. [2024-11-13 16:08:11,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-13 16:08:11,824 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 5 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 35 [2024-11-13 16:08:11,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:08:11,825 INFO L225 Difference]: With dead ends: 113 [2024-11-13 16:08:11,825 INFO L226 Difference]: Without dead ends: 113 [2024-11-13 16:08:11,826 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2024-11-13 16:08:11,826 INFO L432 NwaCegarLoop]: 69 mSDtfsCounter, 130 mSDsluCounter, 464 mSDsCounter, 0 mSdLazyCounter, 737 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 533 SdHoareTripleChecker+Invalid, 748 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 737 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-13 16:08:11,827 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 533 Invalid, 748 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 737 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-13 16:08:11,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2024-11-13 16:08:11,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 104. [2024-11-13 16:08:11,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 62 states have (on average 1.5161290322580645) internal successors, (94), 89 states have internal predecessors, (94), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-13 16:08:11,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 114 transitions. [2024-11-13 16:08:11,833 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 114 transitions. Word has length 35 [2024-11-13 16:08:11,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:08:11,833 INFO L471 AbstractCegarLoop]: Abstraction has 104 states and 114 transitions. [2024-11-13 16:08:11,834 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 5 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-13 16:08:11,834 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 114 transitions. [2024-11-13 16:08:11,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-11-13 16:08:11,835 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:08:11,835 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-13 16:08:11,856 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-13 16:08:12,039 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:08:12,039 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-13 16:08:12,039 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:08:12,039 INFO L85 PathProgramCache]: Analyzing trace with hash -1943789972, now seen corresponding path program 1 times [2024-11-13 16:08:12,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:08:12,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758403826] [2024-11-13 16:08:12,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:08:12,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:08:12,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:08:12,431 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 16:08:12,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:08:12,436 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-11-13 16:08:12,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:08:12,491 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-13 16:08:12,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:08:12,496 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-11-13 16:08:12,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:08:12,500 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-13 16:08:12,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:08:12,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758403826] [2024-11-13 16:08:12,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758403826] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:08:12,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109997864] [2024-11-13 16:08:12,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:08:12,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:08:12,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:08:12,503 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:08:12,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-13 16:08:12,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:08:12,663 INFO L255 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-11-13 16:08:12,666 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:08:13,003 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 3 [2024-11-13 16:08:13,225 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-13 16:08:13,225 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:08:13,640 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-13 16:08:13,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109997864] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:08:13,641 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:08:13,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 15] total 30 [2024-11-13 16:08:13,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429678842] [2024-11-13 16:08:13,641 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:08:13,642 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-13 16:08:13,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:08:13,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-13 16:08:13,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=712, Unknown=0, NotChecked=0, Total=870 [2024-11-13 16:08:13,643 INFO L87 Difference]: Start difference. First operand 104 states and 114 transitions. Second operand has 30 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 states have internal predecessors, (59), 7 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 6 states have call predecessors, (10), 7 states have call successors, (10) [2024-11-13 16:08:14,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:08:14,281 INFO L93 Difference]: Finished difference Result 135 states and 152 transitions. [2024-11-13 16:08:14,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-13 16:08:14,282 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 states have internal predecessors, (59), 7 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 6 states have call predecessors, (10), 7 states have call successors, (10) Word has length 38 [2024-11-13 16:08:14,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:08:14,283 INFO L225 Difference]: With dead ends: 135 [2024-11-13 16:08:14,283 INFO L226 Difference]: Without dead ends: 135 [2024-11-13 16:08:14,283 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 65 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=203, Invalid=987, Unknown=0, NotChecked=0, Total=1190 [2024-11-13 16:08:14,284 INFO L432 NwaCegarLoop]: 80 mSDtfsCounter, 69 mSDsluCounter, 839 mSDsCounter, 0 mSdLazyCounter, 534 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 919 SdHoareTripleChecker+Invalid, 562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-13 16:08:14,284 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 919 Invalid, 562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 534 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-13 16:08:14,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2024-11-13 16:08:14,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 122. [2024-11-13 16:08:14,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 77 states have (on average 1.4285714285714286) internal successors, (110), 104 states have internal predecessors, (110), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-11-13 16:08:14,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 136 transitions. [2024-11-13 16:08:14,291 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 136 transitions. Word has length 38 [2024-11-13 16:08:14,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:08:14,292 INFO L471 AbstractCegarLoop]: Abstraction has 122 states and 136 transitions. [2024-11-13 16:08:14,292 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 states have internal predecessors, (59), 7 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 6 states have call predecessors, (10), 7 states have call successors, (10) [2024-11-13 16:08:14,292 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 136 transitions. [2024-11-13 16:08:14,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-13 16:08:14,293 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:08:14,293 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:08:14,315 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-13 16:08:14,493 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:08:14,494 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-13 16:08:14,494 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:08:14,494 INFO L85 PathProgramCache]: Analyzing trace with hash 464554395, now seen corresponding path program 2 times [2024-11-13 16:08:14,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:08:14,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781736110] [2024-11-13 16:08:14,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:08:14,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:08:14,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:08:15,059 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 16:08:15,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:08:15,062 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-11-13 16:08:15,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:08:15,081 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-11-13 16:08:15,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:08:15,089 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-11-13 16:08:15,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:08:15,096 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-13 16:08:15,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:08:15,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781736110] [2024-11-13 16:08:15,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781736110] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:08:15,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966052621] [2024-11-13 16:08:15,097 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 16:08:15,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:08:15,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:08:15,099 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:08:15,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-13 16:08:15,249 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 16:08:15,249 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 16:08:15,251 INFO L255 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-13 16:08:15,253 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:08:15,350 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-13 16:08:15,576 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-11-13 16:08:15,576 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 20 [2024-11-13 16:08:16,196 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-13 16:08:16,196 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:08:16,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966052621] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:08:16,678 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 16:08:16,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 22 [2024-11-13 16:08:16,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907457167] [2024-11-13 16:08:16,678 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 16:08:16,678 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-13 16:08:16,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:08:16,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-13 16:08:16,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=717, Unknown=0, NotChecked=0, Total=812 [2024-11-13 16:08:16,680 INFO L87 Difference]: Start difference. First operand 122 states and 136 transitions. Second operand has 23 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2024-11-13 16:08:18,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:08:18,778 INFO L93 Difference]: Finished difference Result 156 states and 174 transitions. [2024-11-13 16:08:18,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-13 16:08:18,779 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 39 [2024-11-13 16:08:18,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:08:18,780 INFO L225 Difference]: With dead ends: 156 [2024-11-13 16:08:18,780 INFO L226 Difference]: Without dead ends: 156 [2024-11-13 16:08:18,781 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=269, Invalid=1801, Unknown=0, NotChecked=0, Total=2070 [2024-11-13 16:08:18,782 INFO L432 NwaCegarLoop]: 76 mSDtfsCounter, 200 mSDsluCounter, 861 mSDsCounter, 0 mSdLazyCounter, 1301 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 937 SdHoareTripleChecker+Invalid, 1333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-13 16:08:18,782 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 937 Invalid, 1333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 1301 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-13 16:08:18,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2024-11-13 16:08:18,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 128. [2024-11-13 16:08:18,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 84 states have (on average 1.380952380952381) internal successors, (116), 110 states have internal predecessors, (116), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-11-13 16:08:18,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 142 transitions. [2024-11-13 16:08:18,789 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 142 transitions. Word has length 39 [2024-11-13 16:08:18,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:08:18,789 INFO L471 AbstractCegarLoop]: Abstraction has 128 states and 142 transitions. [2024-11-13 16:08:18,789 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2024-11-13 16:08:18,789 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 142 transitions. [2024-11-13 16:08:18,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-13 16:08:18,790 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:08:18,790 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-13 16:08:18,813 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-13 16:08:18,991 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-13 16:08:18,991 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting upsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-13 16:08:18,992 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:08:18,992 INFO L85 PathProgramCache]: Analyzing trace with hash 1597538571, now seen corresponding path program 1 times [2024-11-13 16:08:18,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:08:18,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067981643] [2024-11-13 16:08:18,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:08:18,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:08:19,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:08:19,345 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 16:08:19,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:08:19,347 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-11-13 16:08:19,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:08:19,369 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-13 16:08:19,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:08:19,373 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-11-13 16:08:19,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:08:19,377 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-13 16:08:19,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:08:19,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067981643] [2024-11-13 16:08:19,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067981643] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:08:19,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560802082] [2024-11-13 16:08:19,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:08:19,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:08:19,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:08:19,381 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:08:19,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-13 16:08:19,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:08:19,487 INFO L255 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-13 16:08:19,490 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:08:19,873 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-13 16:08:19,873 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:08:20,507 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 65 [2024-11-13 16:08:20,929 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-13 16:08:20,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560802082] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:08:20,930 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:08:20,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 35 [2024-11-13 16:08:20,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831589325] [2024-11-13 16:08:20,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:08:20,931 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-11-13 16:08:20,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:08:20,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-11-13 16:08:20,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1087, Unknown=0, NotChecked=0, Total=1260 [2024-11-13 16:08:20,932 INFO L87 Difference]: Start difference. First operand 128 states and 142 transitions. Second operand has 36 states, 32 states have (on average 1.8125) internal successors, (58), 32 states have internal predecessors, (58), 10 states have call successors, (11), 5 states have call predecessors, (11), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2024-11-13 16:08:22,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:08:22,213 INFO L93 Difference]: Finished difference Result 191 states and 211 transitions. [2024-11-13 16:08:22,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-13 16:08:22,214 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 32 states have (on average 1.8125) internal successors, (58), 32 states have internal predecessors, (58), 10 states have call successors, (11), 5 states have call predecessors, (11), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 41 [2024-11-13 16:08:22,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:08:22,215 INFO L225 Difference]: With dead ends: 191 [2024-11-13 16:08:22,215 INFO L226 Difference]: Without dead ends: 191 [2024-11-13 16:08:22,216 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 717 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=406, Invalid=2564, Unknown=0, NotChecked=0, Total=2970 [2024-11-13 16:08:22,217 INFO L432 NwaCegarLoop]: 78 mSDtfsCounter, 164 mSDsluCounter, 949 mSDsCounter, 0 mSdLazyCounter, 863 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 1027 SdHoareTripleChecker+Invalid, 914 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 863 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-13 16:08:22,217 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 1027 Invalid, 914 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 863 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-13 16:08:22,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2024-11-13 16:08:22,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 154. [2024-11-13 16:08:22,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 103 states have (on average 1.4660194174757282) internal successors, (151), 129 states have internal predecessors, (151), 18 states have call successors, (18), 6 states have call predecessors, (18), 6 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2024-11-13 16:08:22,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 187 transitions. [2024-11-13 16:08:22,227 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 187 transitions. Word has length 41 [2024-11-13 16:08:22,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:08:22,227 INFO L471 AbstractCegarLoop]: Abstraction has 154 states and 187 transitions. [2024-11-13 16:08:22,228 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 32 states have (on average 1.8125) internal successors, (58), 32 states have internal predecessors, (58), 10 states have call successors, (11), 5 states have call predecessors, (11), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2024-11-13 16:08:22,228 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 187 transitions. [2024-11-13 16:08:22,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-13 16:08:22,230 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:08:22,230 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-13 16:08:22,253 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-13 16:08:22,430 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-13 16:08:22,431 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting upsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-13 16:08:22,431 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:08:22,431 INFO L85 PathProgramCache]: Analyzing trace with hash 1597538570, now seen corresponding path program 1 times [2024-11-13 16:08:22,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:08:22,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671255641] [2024-11-13 16:08:22,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:08:22,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:08:22,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:08:22,509 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 16:08:22,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:08:22,511 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-11-13 16:08:22,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:08:22,519 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-13 16:08:22,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:08:22,522 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-11-13 16:08:22,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:08:22,524 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-13 16:08:22,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:08:22,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671255641] [2024-11-13 16:08:22,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671255641] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 16:08:22,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 16:08:22,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-13 16:08:22,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961152222] [2024-11-13 16:08:22,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 16:08:22,525 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-13 16:08:22,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:08:22,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-13 16:08:22,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-13 16:08:22,526 INFO L87 Difference]: Start difference. First operand 154 states and 187 transitions. Second operand has 6 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-13 16:08:22,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:08:22,722 INFO L93 Difference]: Finished difference Result 161 states and 190 transitions. [2024-11-13 16:08:22,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-13 16:08:22,722 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 41 [2024-11-13 16:08:22,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:08:22,724 INFO L225 Difference]: With dead ends: 161 [2024-11-13 16:08:22,724 INFO L226 Difference]: Without dead ends: 161 [2024-11-13 16:08:22,724 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-11-13 16:08:22,725 INFO L432 NwaCegarLoop]: 75 mSDtfsCounter, 67 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-13 16:08:22,725 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 263 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-13 16:08:22,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2024-11-13 16:08:22,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 151. [2024-11-13 16:08:22,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 103 states have (on average 1.3592233009708738) internal successors, (140), 126 states have internal predecessors, (140), 18 states have call successors, (18), 6 states have call predecessors, (18), 6 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2024-11-13 16:08:22,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 176 transitions. [2024-11-13 16:08:22,732 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 176 transitions. Word has length 41 [2024-11-13 16:08:22,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:08:22,732 INFO L471 AbstractCegarLoop]: Abstraction has 151 states and 176 transitions. [2024-11-13 16:08:22,732 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-13 16:08:22,732 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 176 transitions. [2024-11-13 16:08:22,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-13 16:08:22,733 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:08:22,733 INFO L215 NwaCegarLoop]: trace histogram [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 16:08:22,733 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-13 16:08:22,733 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting upsweepErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-13 16:08:22,734 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:08:22,734 INFO L85 PathProgramCache]: Analyzing trace with hash -2015911862, now seen corresponding path program 1 times [2024-11-13 16:08:22,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:08:22,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369457067] [2024-11-13 16:08:22,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:08:22,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:08:22,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:08:23,031 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 16:08:23,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:08:23,033 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-11-13 16:08:23,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:08:23,046 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-13 16:08:23,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:08:23,049 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-11-13 16:08:23,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:08:23,053 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-13 16:08:23,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:08:23,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369457067] [2024-11-13 16:08:23,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369457067] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:08:23,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038405879] [2024-11-13 16:08:23,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:08:23,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:08:23,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:08:23,056 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:08:23,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-13 16:08:23,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:08:23,148 INFO L255 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-13 16:08:23,150 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:08:23,485 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-13 16:08:23,485 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:08:23,702 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2024-11-13 16:08:23,849 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-13 16:08:23,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038405879] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:08:23,850 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:08:23,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 32 [2024-11-13 16:08:23,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524797138] [2024-11-13 16:08:23,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:08:23,851 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-13 16:08:23,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:08:23,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-13 16:08:23,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=897, Unknown=0, NotChecked=0, Total=1056 [2024-11-13 16:08:23,852 INFO L87 Difference]: Start difference. First operand 151 states and 176 transitions. Second operand has 33 states, 29 states have (on average 2.103448275862069) internal successors, (61), 29 states have internal predecessors, (61), 10 states have call successors, (11), 5 states have call predecessors, (11), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2024-11-13 16:08:24,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:08:24,711 INFO L93 Difference]: Finished difference Result 174 states and 197 transitions. [2024-11-13 16:08:24,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-13 16:08:24,712 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 29 states have (on average 2.103448275862069) internal successors, (61), 29 states have internal predecessors, (61), 10 states have call successors, (11), 5 states have call predecessors, (11), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 42 [2024-11-13 16:08:24,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:08:24,714 INFO L225 Difference]: With dead ends: 174 [2024-11-13 16:08:24,714 INFO L226 Difference]: Without dead ends: 174 [2024-11-13 16:08:24,714 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 514 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=298, Invalid=1594, Unknown=0, NotChecked=0, Total=1892 [2024-11-13 16:08:24,715 INFO L432 NwaCegarLoop]: 76 mSDtfsCounter, 118 mSDsluCounter, 866 mSDsCounter, 0 mSdLazyCounter, 646 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 942 SdHoareTripleChecker+Invalid, 682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-13 16:08:24,715 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 942 Invalid, 682 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 646 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-13 16:08:24,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2024-11-13 16:08:24,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 146. [2024-11-13 16:08:24,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 101 states have (on average 1.306930693069307) internal successors, (132), 122 states have internal predecessors, (132), 17 states have call successors, (17), 6 states have call predecessors, (17), 6 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2024-11-13 16:08:24,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 166 transitions. [2024-11-13 16:08:24,730 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 166 transitions. Word has length 42 [2024-11-13 16:08:24,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:08:24,731 INFO L471 AbstractCegarLoop]: Abstraction has 146 states and 166 transitions. [2024-11-13 16:08:24,731 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 29 states have (on average 2.103448275862069) internal successors, (61), 29 states have internal predecessors, (61), 10 states have call successors, (11), 5 states have call predecessors, (11), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2024-11-13 16:08:24,731 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 166 transitions. [2024-11-13 16:08:24,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-13 16:08:24,732 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:08:24,732 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:08:24,753 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-13 16:08:24,932 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-13 16:08:24,933 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting upsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-13 16:08:24,933 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:08:24,933 INFO L85 PathProgramCache]: Analyzing trace with hash -262313111, now seen corresponding path program 1 times [2024-11-13 16:08:24,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:08:24,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946509675] [2024-11-13 16:08:24,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:08:24,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:08:24,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:08:25,068 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 16:08:25,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:08:25,070 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-11-13 16:08:25,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:08:25,081 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-13 16:08:25,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:08:25,085 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-11-13 16:08:25,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:08:25,088 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-13 16:08:25,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:08:25,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946509675] [2024-11-13 16:08:25,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946509675] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:08:25,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863861944] [2024-11-13 16:08:25,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:08:25,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:08:25,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:08:25,091 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:08:25,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-13 16:08:25,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:08:25,207 INFO L255 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-13 16:08:25,209 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:08:25,322 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-13 16:08:25,322 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:08:25,448 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-13 16:08:25,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863861944] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:08:25,448 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:08:25,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2024-11-13 16:08:25,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649573896] [2024-11-13 16:08:25,448 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:08:25,449 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-13 16:08:25,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:08:25,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-13 16:08:25,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2024-11-13 16:08:25,450 INFO L87 Difference]: Start difference. First operand 146 states and 166 transitions. Second operand has 18 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 4 states have call successors, (9), 5 states have call predecessors, (9), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-13 16:08:25,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:08:25,784 INFO L93 Difference]: Finished difference Result 168 states and 190 transitions. [2024-11-13 16:08:25,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-13 16:08:25,785 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 4 states have call successors, (9), 5 states have call predecessors, (9), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 44 [2024-11-13 16:08:25,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:08:25,786 INFO L225 Difference]: With dead ends: 168 [2024-11-13 16:08:25,786 INFO L226 Difference]: Without dead ends: 168 [2024-11-13 16:08:25,786 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 83 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2024-11-13 16:08:25,787 INFO L432 NwaCegarLoop]: 79 mSDtfsCounter, 44 mSDsluCounter, 723 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 802 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-13 16:08:25,787 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 802 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 324 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-13 16:08:25,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2024-11-13 16:08:25,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 155. [2024-11-13 16:08:25,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 108 states have (on average 1.287037037037037) internal successors, (139), 130 states have internal predecessors, (139), 18 states have call successors, (18), 7 states have call predecessors, (18), 7 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2024-11-13 16:08:25,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 175 transitions. [2024-11-13 16:08:25,795 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 175 transitions. Word has length 44 [2024-11-13 16:08:25,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:08:25,796 INFO L471 AbstractCegarLoop]: Abstraction has 155 states and 175 transitions. [2024-11-13 16:08:25,796 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 4 states have call successors, (9), 5 states have call predecessors, (9), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-13 16:08:25,796 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 175 transitions. [2024-11-13 16:08:25,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-13 16:08:25,797 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:08:25,797 INFO L215 NwaCegarLoop]: trace histogram [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 16:08:25,823 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-13 16:08:25,997 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-13 16:08:25,998 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-13 16:08:25,998 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:08:25,998 INFO L85 PathProgramCache]: Analyzing trace with hash 434262505, now seen corresponding path program 1 times [2024-11-13 16:08:25,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:08:25,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224814354] [2024-11-13 16:08:25,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:08:25,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:08:26,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:08:26,075 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 16:08:26,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:08:26,077 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-11-13 16:08:26,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:08:26,085 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-13 16:08:26,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:08:26,087 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-11-13 16:08:26,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:08:26,090 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-11-13 16:08:26,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:08:26,103 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-13 16:08:26,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:08:26,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224814354] [2024-11-13 16:08:26,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224814354] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 16:08:26,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 16:08:26,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-13 16:08:26,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351718877] [2024-11-13 16:08:26,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 16:08:26,104 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-13 16:08:26,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:08:26,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-13 16:08:26,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-13 16:08:26,105 INFO L87 Difference]: Start difference. First operand 155 states and 175 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-13 16:08:26,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:08:26,317 INFO L93 Difference]: Finished difference Result 160 states and 181 transitions. [2024-11-13 16:08:26,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-13 16:08:26,318 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 50 [2024-11-13 16:08:26,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:08:26,320 INFO L225 Difference]: With dead ends: 160 [2024-11-13 16:08:26,321 INFO L226 Difference]: Without dead ends: 160 [2024-11-13 16:08:26,321 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-11-13 16:08:26,324 INFO L432 NwaCegarLoop]: 66 mSDtfsCounter, 65 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-13 16:08:26,324 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 240 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-13 16:08:26,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2024-11-13 16:08:26,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 150. [2024-11-13 16:08:26,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 108 states have (on average 1.2407407407407407) internal successors, (134), 125 states have internal predecessors, (134), 18 states have call successors, (18), 7 states have call predecessors, (18), 7 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2024-11-13 16:08:26,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 170 transitions. [2024-11-13 16:08:26,338 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 170 transitions. Word has length 50 [2024-11-13 16:08:26,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:08:26,338 INFO L471 AbstractCegarLoop]: Abstraction has 150 states and 170 transitions. [2024-11-13 16:08:26,339 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-13 16:08:26,339 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 170 transitions. [2024-11-13 16:08:26,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-13 16:08:26,340 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:08:26,340 INFO L215 NwaCegarLoop]: trace histogram [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 16:08:26,341 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-13 16:08:26,341 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-13 16:08:26,341 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:08:26,341 INFO L85 PathProgramCache]: Analyzing trace with hash 434262506, now seen corresponding path program 1 times [2024-11-13 16:08:26,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:08:26,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427147270] [2024-11-13 16:08:26,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:08:26,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:08:26,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:08:26,641 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 16:08:26,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:08:26,644 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-11-13 16:08:26,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:08:26,657 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-13 16:08:26,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:08:26,660 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-11-13 16:08:26,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:08:26,664 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-11-13 16:08:26,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:08:26,771 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-13 16:08:26,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:08:26,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427147270] [2024-11-13 16:08:26,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427147270] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:08:26,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133280643] [2024-11-13 16:08:26,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:08:26,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:08:26,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:08:26,774 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:08:26,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-13 16:08:26,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:08:26,885 INFO L255 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-13 16:08:26,887 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:08:27,177 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-13 16:08:27,177 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:08:27,358 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2024-11-13 16:08:27,441 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 16:08:27,442 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2024-11-13 16:08:27,629 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-13 16:08:27,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133280643] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:08:27,629 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:08:27,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 32 [2024-11-13 16:08:27,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642016279] [2024-11-13 16:08:27,629 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:08:27,630 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-13 16:08:27,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:08:27,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-13 16:08:27,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=927, Unknown=0, NotChecked=0, Total=1056 [2024-11-13 16:08:27,631 INFO L87 Difference]: Start difference. First operand 150 states and 170 transitions. Second operand has 33 states, 32 states have (on average 2.40625) internal successors, (77), 29 states have internal predecessors, (77), 13 states have call successors, (14), 5 states have call predecessors, (14), 3 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2024-11-13 16:08:28,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:08:28,834 INFO L93 Difference]: Finished difference Result 196 states and 225 transitions. [2024-11-13 16:08:28,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-13 16:08:28,835 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.40625) internal successors, (77), 29 states have internal predecessors, (77), 13 states have call successors, (14), 5 states have call predecessors, (14), 3 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) Word has length 50 [2024-11-13 16:08:28,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:08:28,836 INFO L225 Difference]: With dead ends: 196 [2024-11-13 16:08:28,837 INFO L226 Difference]: Without dead ends: 196 [2024-11-13 16:08:28,837 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=238, Invalid=1832, Unknown=0, NotChecked=0, Total=2070 [2024-11-13 16:08:28,838 INFO L432 NwaCegarLoop]: 62 mSDtfsCounter, 129 mSDsluCounter, 799 mSDsCounter, 0 mSdLazyCounter, 973 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 861 SdHoareTripleChecker+Invalid, 1004 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 973 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-13 16:08:28,838 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 861 Invalid, 1004 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 973 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-13 16:08:28,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2024-11-13 16:08:28,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 176. [2024-11-13 16:08:28,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 130 states have (on average 1.2307692307692308) internal successors, (160), 145 states have internal predecessors, (160), 22 states have call successors, (22), 9 states have call predecessors, (22), 9 states have return successors, (22), 21 states have call predecessors, (22), 22 states have call successors, (22) [2024-11-13 16:08:28,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 204 transitions. [2024-11-13 16:08:28,849 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 204 transitions. Word has length 50 [2024-11-13 16:08:28,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:08:28,849 INFO L471 AbstractCegarLoop]: Abstraction has 176 states and 204 transitions. [2024-11-13 16:08:28,849 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.40625) internal successors, (77), 29 states have internal predecessors, (77), 13 states have call successors, (14), 5 states have call predecessors, (14), 3 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2024-11-13 16:08:28,849 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 204 transitions. [2024-11-13 16:08:28,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-13 16:08:28,850 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:08:28,850 INFO L215 NwaCegarLoop]: trace histogram [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 16:08:28,873 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-13 16:08:29,050 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-13 16:08:29,051 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting downsweepErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-13 16:08:29,051 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:08:29,051 INFO L85 PathProgramCache]: Analyzing trace with hash 672773065, now seen corresponding path program 1 times [2024-11-13 16:08:29,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:08:29,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550417936] [2024-11-13 16:08:29,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:08:29,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:08:29,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:08:29,358 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 16:08:29,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:08:29,360 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-11-13 16:08:29,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:08:29,374 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-13 16:08:29,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:08:29,377 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-11-13 16:08:29,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:08:29,380 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-11-13 16:08:29,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:08:29,388 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-13 16:08:29,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:08:29,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550417936] [2024-11-13 16:08:29,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550417936] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:08:29,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717317137] [2024-11-13 16:08:29,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:08:29,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:08:29,389 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:08:29,391 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:08:29,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-13 16:08:29,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:08:29,525 INFO L255 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-13 16:08:29,527 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:08:29,840 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-13 16:08:29,841 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:08:29,890 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2024-11-13 16:08:30,648 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-13 16:08:30,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717317137] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:08:30,649 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:08:30,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 30 [2024-11-13 16:08:30,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511589535] [2024-11-13 16:08:30,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:08:30,650 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-13 16:08:30,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:08:30,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-13 16:08:30,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2024-11-13 16:08:30,651 INFO L87 Difference]: Start difference. First operand 176 states and 204 transitions. Second operand has 31 states, 30 states have (on average 2.8666666666666667) internal successors, (86), 27 states have internal predecessors, (86), 10 states have call successors, (12), 5 states have call predecessors, (12), 3 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2024-11-13 16:08:31,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:08:31,623 INFO L93 Difference]: Finished difference Result 235 states and 278 transitions. [2024-11-13 16:08:31,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-13 16:08:31,624 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.8666666666666667) internal successors, (86), 27 states have internal predecessors, (86), 10 states have call successors, (12), 5 states have call predecessors, (12), 3 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) Word has length 53 [2024-11-13 16:08:31,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:08:31,626 INFO L225 Difference]: With dead ends: 235 [2024-11-13 16:08:31,626 INFO L226 Difference]: Without dead ends: 235 [2024-11-13 16:08:31,626 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 94 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=249, Invalid=1913, Unknown=0, NotChecked=0, Total=2162 [2024-11-13 16:08:31,627 INFO L432 NwaCegarLoop]: 64 mSDtfsCounter, 203 mSDsluCounter, 767 mSDsCounter, 0 mSdLazyCounter, 731 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 831 SdHoareTripleChecker+Invalid, 782 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 731 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-13 16:08:31,627 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [206 Valid, 831 Invalid, 782 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 731 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-13 16:08:31,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2024-11-13 16:08:31,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 189. [2024-11-13 16:08:31,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 141 states have (on average 1.198581560283688) internal successors, (169), 155 states have internal predecessors, (169), 24 states have call successors, (24), 10 states have call predecessors, (24), 10 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2024-11-13 16:08:31,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 217 transitions. [2024-11-13 16:08:31,648 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 217 transitions. Word has length 53 [2024-11-13 16:08:31,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:08:31,649 INFO L471 AbstractCegarLoop]: Abstraction has 189 states and 217 transitions. [2024-11-13 16:08:31,649 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.8666666666666667) internal successors, (86), 27 states have internal predecessors, (86), 10 states have call successors, (12), 5 states have call predecessors, (12), 3 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2024-11-13 16:08:31,649 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 217 transitions. [2024-11-13 16:08:31,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-13 16:08:31,650 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:08:31,650 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 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] [2024-11-13 16:08:31,668 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-13 16:08:31,851 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-13 16:08:31,851 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting upsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-13 16:08:31,851 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:08:31,851 INFO L85 PathProgramCache]: Analyzing trace with hash -955139488, now seen corresponding path program 2 times [2024-11-13 16:08:31,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:08:31,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518580734] [2024-11-13 16:08:31,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:08:31,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:08:31,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:08:32,446 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 16:08:32,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:08:32,448 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-11-13 16:08:32,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:08:32,468 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-11-13 16:08:32,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:08:32,471 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-11-13 16:08:32,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:08:32,474 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-13 16:08:32,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:08:32,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518580734] [2024-11-13 16:08:32,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518580734] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:08:32,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920093130] [2024-11-13 16:08:32,474 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 16:08:32,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:08:32,474 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:08:32,476 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:08:32,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-13 16:08:32,597 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 16:08:32,598 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 16:08:32,600 INFO L255 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 53 conjuncts are in the unsatisfiable core [2024-11-13 16:08:32,603 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:08:33,426 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-13 16:08:33,426 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:08:34,851 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 161 treesize of output 151 [2024-11-13 16:08:35,738 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-13 16:08:35,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920093130] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:08:35,738 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:08:35,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 17] total 52 [2024-11-13 16:08:35,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972737991] [2024-11-13 16:08:35,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:08:35,739 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2024-11-13 16:08:35,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:08:35,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2024-11-13 16:08:35,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=2489, Unknown=0, NotChecked=0, Total=2756 [2024-11-13 16:08:35,741 INFO L87 Difference]: Start difference. First operand 189 states and 217 transitions. Second operand has 53 states, 46 states have (on average 2.0434782608695654) internal successors, (94), 46 states have internal predecessors, (94), 14 states have call successors, (15), 8 states have call predecessors, (15), 1 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2024-11-13 16:08:39,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:08:39,775 INFO L93 Difference]: Finished difference Result 259 states and 296 transitions. [2024-11-13 16:08:39,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2024-11-13 16:08:39,776 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 46 states have (on average 2.0434782608695654) internal successors, (94), 46 states have internal predecessors, (94), 14 states have call successors, (15), 8 states have call predecessors, (15), 1 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) Word has length 53 [2024-11-13 16:08:39,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:08:39,778 INFO L225 Difference]: With dead ends: 259 [2024-11-13 16:08:39,778 INFO L226 Difference]: Without dead ends: 259 [2024-11-13 16:08:39,781 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2077 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=855, Invalid=7887, Unknown=0, NotChecked=0, Total=8742 [2024-11-13 16:08:39,783 INFO L432 NwaCegarLoop]: 86 mSDtfsCounter, 250 mSDsluCounter, 1513 mSDsCounter, 0 mSdLazyCounter, 2042 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 1599 SdHoareTripleChecker+Invalid, 2153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 2042 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-11-13 16:08:39,786 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [251 Valid, 1599 Invalid, 2153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 2042 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-11-13 16:08:39,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2024-11-13 16:08:39,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 229. [2024-11-13 16:08:39,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 171 states have (on average 1.2046783625730995) internal successors, (206), 186 states have internal predecessors, (206), 31 states have call successors, (31), 13 states have call predecessors, (31), 13 states have return successors, (31), 29 states have call predecessors, (31), 31 states have call successors, (31) [2024-11-13 16:08:39,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 268 transitions. [2024-11-13 16:08:39,803 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 268 transitions. Word has length 53 [2024-11-13 16:08:39,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:08:39,804 INFO L471 AbstractCegarLoop]: Abstraction has 229 states and 268 transitions. [2024-11-13 16:08:39,804 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 46 states have (on average 2.0434782608695654) internal successors, (94), 46 states have internal predecessors, (94), 14 states have call successors, (15), 8 states have call predecessors, (15), 1 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2024-11-13 16:08:39,804 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 268 transitions. [2024-11-13 16:08:39,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-13 16:08:39,805 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:08:39,805 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 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 16:08:39,827 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-13 16:08:40,009 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-13 16:08:40,009 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting upsweepErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-13 16:08:40,009 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:08:40,009 INFO L85 PathProgramCache]: Analyzing trace with hash 455446933, now seen corresponding path program 1 times [2024-11-13 16:08:40,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:08:40,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115275140] [2024-11-13 16:08:40,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:08:40,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:08:40,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:08:40,633 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 16:08:40,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:08:40,635 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-11-13 16:08:40,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:08:40,654 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-11-13 16:08:40,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:08:40,657 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-11-13 16:08:40,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:08:40,661 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-13 16:08:40,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:08:40,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115275140] [2024-11-13 16:08:40,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115275140] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:08:40,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778973873] [2024-11-13 16:08:40,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:08:40,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:08:40,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:08:40,664 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:08:40,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-13 16:08:40,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:08:40,806 INFO L255 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-11-13 16:08:40,810 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:08:41,662 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-13 16:08:41,663 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:08:42,155 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 73 [2024-11-13 16:08:42,782 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-13 16:08:42,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778973873] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:08:42,783 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:08:42,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 15] total 48 [2024-11-13 16:08:42,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504857453] [2024-11-13 16:08:42,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:08:42,783 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-11-13 16:08:42,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:08:42,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-11-13 16:08:42,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=2101, Unknown=0, NotChecked=0, Total=2352 [2024-11-13 16:08:42,785 INFO L87 Difference]: Start difference. First operand 229 states and 268 transitions. Second operand has 49 states, 44 states have (on average 2.2045454545454546) internal successors, (97), 42 states have internal predecessors, (97), 14 states have call successors, (15), 8 states have call predecessors, (15), 1 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2024-11-13 16:08:46,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:08:46,933 INFO L93 Difference]: Finished difference Result 315 states and 362 transitions. [2024-11-13 16:08:46,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2024-11-13 16:08:46,934 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 44 states have (on average 2.2045454545454546) internal successors, (97), 42 states have internal predecessors, (97), 14 states have call successors, (15), 8 states have call predecessors, (15), 1 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) Word has length 54 [2024-11-13 16:08:46,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:08:46,935 INFO L225 Difference]: With dead ends: 315 [2024-11-13 16:08:46,936 INFO L226 Difference]: Without dead ends: 315 [2024-11-13 16:08:46,939 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3748 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1149, Invalid=11283, Unknown=0, NotChecked=0, Total=12432 [2024-11-13 16:08:46,940 INFO L432 NwaCegarLoop]: 79 mSDtfsCounter, 288 mSDsluCounter, 1408 mSDsCounter, 0 mSdLazyCounter, 2108 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 1487 SdHoareTripleChecker+Invalid, 2245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 2108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-11-13 16:08:46,940 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [288 Valid, 1487 Invalid, 2245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 2108 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-11-13 16:08:46,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2024-11-13 16:08:46,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 273. [2024-11-13 16:08:46,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 203 states have (on average 1.1970443349753694) internal successors, (243), 218 states have internal predecessors, (243), 39 states have call successors, (39), 17 states have call predecessors, (39), 17 states have return successors, (39), 37 states have call predecessors, (39), 39 states have call successors, (39) [2024-11-13 16:08:46,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 321 transitions. [2024-11-13 16:08:46,954 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 321 transitions. Word has length 54 [2024-11-13 16:08:46,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:08:46,955 INFO L471 AbstractCegarLoop]: Abstraction has 273 states and 321 transitions. [2024-11-13 16:08:46,955 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 44 states have (on average 2.2045454545454546) internal successors, (97), 42 states have internal predecessors, (97), 14 states have call successors, (15), 8 states have call predecessors, (15), 1 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2024-11-13 16:08:46,955 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 321 transitions. [2024-11-13 16:08:46,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-11-13 16:08:46,956 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:08:46,956 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 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] [2024-11-13 16:08:46,978 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-13 16:08:47,160 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:08:47,160 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting upsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-13 16:08:47,160 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:08:47,160 INFO L85 PathProgramCache]: Analyzing trace with hash -403425804, now seen corresponding path program 3 times [2024-11-13 16:08:47,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:08:47,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849406307] [2024-11-13 16:08:47,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:08:47,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:08:47,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:08:47,421 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 16:08:47,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:08:47,423 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-11-13 16:08:47,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:08:47,438 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-11-13 16:08:47,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:08:47,440 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-11-13 16:08:47,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:08:47,443 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 7 proven. 28 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-13 16:08:47,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:08:47,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849406307] [2024-11-13 16:08:47,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849406307] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:08:47,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998570458] [2024-11-13 16:08:47,444 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 16:08:47,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:08:47,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:08:47,446 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:08:47,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-13 16:08:47,575 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-13 16:08:47,575 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 16:08:47,577 INFO L255 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 65 conjuncts are in the unsatisfiable core [2024-11-13 16:08:47,579 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:08:50,652 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-13 16:08:50,652 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:08:51,654 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 71 [2024-11-13 16:08:52,231 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 17 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-13 16:08:52,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998570458] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:08:52,231 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:08:52,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 18, 17] total 47 [2024-11-13 16:08:52,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210224443] [2024-11-13 16:08:52,231 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:08:52,232 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-11-13 16:08:52,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:08:52,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-11-13 16:08:52,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=1954, Unknown=0, NotChecked=0, Total=2162 [2024-11-13 16:08:52,233 INFO L87 Difference]: Start difference. First operand 273 states and 321 transitions. Second operand has 47 states, 39 states have (on average 2.3076923076923075) internal successors, (90), 38 states have internal predecessors, (90), 16 states have call successors, (19), 11 states have call predecessors, (19), 1 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2024-11-13 16:09:00,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:09:00,490 INFO L93 Difference]: Finished difference Result 381 states and 435 transitions. [2024-11-13 16:09:00,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2024-11-13 16:09:00,491 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 39 states have (on average 2.3076923076923075) internal successors, (90), 38 states have internal predecessors, (90), 16 states have call successors, (19), 11 states have call predecessors, (19), 1 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) Word has length 56 [2024-11-13 16:09:00,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:09:00,493 INFO L225 Difference]: With dead ends: 381 [2024-11-13 16:09:00,493 INFO L226 Difference]: Without dead ends: 381 [2024-11-13 16:09:00,496 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3279 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=1444, Invalid=10988, Unknown=0, NotChecked=0, Total=12432 [2024-11-13 16:09:00,497 INFO L432 NwaCegarLoop]: 76 mSDtfsCounter, 356 mSDsluCounter, 1050 mSDsCounter, 0 mSdLazyCounter, 1225 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 358 SdHoareTripleChecker+Valid, 1126 SdHoareTripleChecker+Invalid, 1384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 1225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-11-13 16:09:00,497 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [358 Valid, 1126 Invalid, 1384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 1225 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-11-13 16:09:00,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2024-11-13 16:09:00,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 330. [2024-11-13 16:09:00,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 246 states have (on average 1.170731707317073) internal successors, (288), 261 states have internal predecessors, (288), 47 states have call successors, (47), 23 states have call predecessors, (47), 23 states have return successors, (47), 45 states have call predecessors, (47), 47 states have call successors, (47) [2024-11-13 16:09:00,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 382 transitions. [2024-11-13 16:09:00,509 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 382 transitions. Word has length 56 [2024-11-13 16:09:00,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:09:00,510 INFO L471 AbstractCegarLoop]: Abstraction has 330 states and 382 transitions. [2024-11-13 16:09:00,510 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 39 states have (on average 2.3076923076923075) internal successors, (90), 38 states have internal predecessors, (90), 16 states have call successors, (19), 11 states have call predecessors, (19), 1 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2024-11-13 16:09:00,510 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 382 transitions. [2024-11-13 16:09:00,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-11-13 16:09:00,511 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:09:00,511 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:09:00,536 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-13 16:09:00,712 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:09:00,712 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-13 16:09:00,712 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:09:00,712 INFO L85 PathProgramCache]: Analyzing trace with hash -2145062993, now seen corresponding path program 1 times [2024-11-13 16:09:00,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:09:00,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123823792] [2024-11-13 16:09:00,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:09:00,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:09:00,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:09:00,930 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 16:09:00,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:09:00,932 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-11-13 16:09:00,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:09:00,947 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-13 16:09:00,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:09:00,951 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-11-13 16:09:00,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:09:00,957 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-11-13 16:09:00,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:09:00,966 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-13 16:09:00,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:09:00,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123823792] [2024-11-13 16:09:00,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123823792] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:09:00,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999362070] [2024-11-13 16:09:00,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:09:00,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:09:00,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:09:00,971 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:09:00,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-13 16:09:01,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:09:01,118 INFO L255 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-13 16:09:01,119 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:09:01,337 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-13 16:09:01,337 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:09:01,597 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-13 16:09:01,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999362070] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:09:01,598 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:09:01,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 30 [2024-11-13 16:09:01,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940049385] [2024-11-13 16:09:01,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:09:01,599 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-13 16:09:01,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:09:01,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-13 16:09:01,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=749, Unknown=0, NotChecked=0, Total=870 [2024-11-13 16:09:01,602 INFO L87 Difference]: Start difference. First operand 330 states and 382 transitions. Second operand has 30 states, 30 states have (on average 2.966666666666667) internal successors, (89), 26 states have internal predecessors, (89), 11 states have call successors, (15), 6 states have call predecessors, (15), 1 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2024-11-13 16:09:02,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:09:02,012 INFO L93 Difference]: Finished difference Result 385 states and 442 transitions. [2024-11-13 16:09:02,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-13 16:09:02,012 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.966666666666667) internal successors, (89), 26 states have internal predecessors, (89), 11 states have call successors, (15), 6 states have call predecessors, (15), 1 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) Word has length 60 [2024-11-13 16:09:02,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:09:02,015 INFO L225 Difference]: With dead ends: 385 [2024-11-13 16:09:02,015 INFO L226 Difference]: Without dead ends: 385 [2024-11-13 16:09:02,015 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=163, Invalid=959, Unknown=0, NotChecked=0, Total=1122 [2024-11-13 16:09:02,016 INFO L432 NwaCegarLoop]: 69 mSDtfsCounter, 127 mSDsluCounter, 785 mSDsCounter, 0 mSdLazyCounter, 385 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 854 SdHoareTripleChecker+Invalid, 400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-13 16:09:02,016 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 854 Invalid, 400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 385 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-13 16:09:02,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2024-11-13 16:09:02,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 343. [2024-11-13 16:09:02,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 257 states have (on average 1.1634241245136188) internal successors, (299), 272 states have internal predecessors, (299), 48 states have call successors, (48), 24 states have call predecessors, (48), 24 states have return successors, (48), 46 states have call predecessors, (48), 48 states have call successors, (48) [2024-11-13 16:09:02,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 395 transitions. [2024-11-13 16:09:02,029 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 395 transitions. Word has length 60 [2024-11-13 16:09:02,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:09:02,029 INFO L471 AbstractCegarLoop]: Abstraction has 343 states and 395 transitions. [2024-11-13 16:09:02,029 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.966666666666667) internal successors, (89), 26 states have internal predecessors, (89), 11 states have call successors, (15), 6 states have call predecessors, (15), 1 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2024-11-13 16:09:02,030 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 395 transitions. [2024-11-13 16:09:02,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-11-13 16:09:02,030 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:09:02,030 INFO L215 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2024-11-13 16:09:02,053 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-13 16:09:02,235 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-11-13 16:09:02,235 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-13 16:09:02,235 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:09:02,236 INFO L85 PathProgramCache]: Analyzing trace with hash 216128300, now seen corresponding path program 1 times [2024-11-13 16:09:02,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:09:02,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921467270] [2024-11-13 16:09:02,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:09:02,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:09:02,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:09:02,313 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 16:09:02,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:09:02,315 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-11-13 16:09:02,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:09:02,322 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-13 16:09:02,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:09:02,324 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-11-13 16:09:02,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:09:02,332 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-11-13 16:09:02,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:09:02,344 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-11-13 16:09:02,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:09:02,352 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-13 16:09:02,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:09:02,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921467270] [2024-11-13 16:09:02,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921467270] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 16:09:02,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 16:09:02,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-13 16:09:02,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395914494] [2024-11-13 16:09:02,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 16:09:02,354 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 16:09:02,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:09:02,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 16:09:02,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-13 16:09:02,355 INFO L87 Difference]: Start difference. First operand 343 states and 395 transitions. Second operand has 5 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-13 16:09:02,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:09:02,486 INFO L93 Difference]: Finished difference Result 383 states and 440 transitions. [2024-11-13 16:09:02,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 16:09:02,487 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 62 [2024-11-13 16:09:02,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:09:02,489 INFO L225 Difference]: With dead ends: 383 [2024-11-13 16:09:02,489 INFO L226 Difference]: Without dead ends: 383 [2024-11-13 16:09:02,489 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 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 16:09:02,491 INFO L432 NwaCegarLoop]: 72 mSDtfsCounter, 45 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 212 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 16:09:02,491 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 212 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 16:09:02,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2024-11-13 16:09:02,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 342. [2024-11-13 16:09:02,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 257 states have (on average 1.1595330739299612) internal successors, (298), 271 states have internal predecessors, (298), 48 states have call successors, (48), 24 states have call predecessors, (48), 24 states have return successors, (48), 46 states have call predecessors, (48), 48 states have call successors, (48) [2024-11-13 16:09:02,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 394 transitions. [2024-11-13 16:09:02,508 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 394 transitions. Word has length 62 [2024-11-13 16:09:02,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:09:02,508 INFO L471 AbstractCegarLoop]: Abstraction has 342 states and 394 transitions. [2024-11-13 16:09:02,508 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-13 16:09:02,508 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 394 transitions. [2024-11-13 16:09:02,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-11-13 16:09:02,509 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:09:02,509 INFO L215 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2024-11-13 16:09:02,509 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-11-13 16:09:02,510 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-13 16:09:02,510 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:09:02,513 INFO L85 PathProgramCache]: Analyzing trace with hash 216128301, now seen corresponding path program 1 times [2024-11-13 16:09:02,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:09:02,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128087781] [2024-11-13 16:09:02,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:09:02,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:09:02,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:09:02,764 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 16:09:02,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:09:02,766 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-11-13 16:09:02,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:09:02,777 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-13 16:09:02,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:09:02,780 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-11-13 16:09:02,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:09:02,785 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-11-13 16:09:02,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:09:02,918 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-11-13 16:09:02,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:09:02,928 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-13 16:09:02,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:09:02,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128087781] [2024-11-13 16:09:02,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128087781] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:09:02,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461714892] [2024-11-13 16:09:02,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:09:02,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:09:02,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:09:02,931 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:09:02,933 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-13 16:09:03,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:09:03,088 INFO L255 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-13 16:09:03,090 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:09:03,359 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-13 16:09:03,360 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:09:03,463 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2024-11-13 16:09:03,571 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 16:09:03,571 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2024-11-13 16:09:03,718 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-13 16:09:03,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461714892] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:09:03,719 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:09:03,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 28 [2024-11-13 16:09:03,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455316678] [2024-11-13 16:09:03,719 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:09:03,719 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-13 16:09:03,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:09:03,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-13 16:09:03,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=720, Unknown=0, NotChecked=0, Total=812 [2024-11-13 16:09:03,720 INFO L87 Difference]: Start difference. First operand 342 states and 394 transitions. Second operand has 29 states, 28 states have (on average 3.6785714285714284) internal successors, (103), 26 states have internal predecessors, (103), 9 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (12), 10 states have call predecessors, (12), 9 states have call successors, (12) [2024-11-13 16:09:04,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:09:04,765 INFO L93 Difference]: Finished difference Result 403 states and 468 transitions. [2024-11-13 16:09:04,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-13 16:09:04,766 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 3.6785714285714284) internal successors, (103), 26 states have internal predecessors, (103), 9 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (12), 10 states have call predecessors, (12), 9 states have call successors, (12) Word has length 62 [2024-11-13 16:09:04,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:09:04,768 INFO L225 Difference]: With dead ends: 403 [2024-11-13 16:09:04,768 INFO L226 Difference]: Without dead ends: 403 [2024-11-13 16:09:04,769 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 118 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=241, Invalid=1921, Unknown=0, NotChecked=0, Total=2162 [2024-11-13 16:09:04,769 INFO L432 NwaCegarLoop]: 50 mSDtfsCounter, 212 mSDsluCounter, 692 mSDsCounter, 0 mSdLazyCounter, 1011 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 742 SdHoareTripleChecker+Invalid, 1033 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1011 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-13 16:09:04,770 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 742 Invalid, 1033 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1011 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-13 16:09:04,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2024-11-13 16:09:04,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 351. [2024-11-13 16:09:04,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 266 states have (on average 1.1729323308270676) internal successors, (312), 280 states have internal predecessors, (312), 48 states have call successors, (48), 24 states have call predecessors, (48), 24 states have return successors, (48), 46 states have call predecessors, (48), 48 states have call successors, (48) [2024-11-13 16:09:04,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 408 transitions. [2024-11-13 16:09:04,782 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 408 transitions. Word has length 62 [2024-11-13 16:09:04,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:09:04,782 INFO L471 AbstractCegarLoop]: Abstraction has 351 states and 408 transitions. [2024-11-13 16:09:04,783 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 3.6785714285714284) internal successors, (103), 26 states have internal predecessors, (103), 9 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (12), 10 states have call predecessors, (12), 9 states have call successors, (12) [2024-11-13 16:09:04,783 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 408 transitions. [2024-11-13 16:09:04,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-11-13 16:09:04,783 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:09:04,784 INFO L215 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:09:04,804 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-13 16:09:04,984 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:09:04,984 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-13 16:09:04,984 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:09:04,985 INFO L85 PathProgramCache]: Analyzing trace with hash 1540831108, now seen corresponding path program 1 times [2024-11-13 16:09:04,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:09:04,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099813471] [2024-11-13 16:09:04,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:09:04,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:09:05,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:09:05,092 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 16:09:05,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:09:05,094 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-11-13 16:09:05,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:09:05,102 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-13 16:09:05,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:09:05,104 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-11-13 16:09:05,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:09:05,106 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-11-13 16:09:05,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:09:05,113 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-11-13 16:09:05,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:09:05,120 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-13 16:09:05,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:09:05,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099813471] [2024-11-13 16:09:05,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099813471] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:09:05,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194048396] [2024-11-13 16:09:05,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:09:05,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:09:05,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:09:05,124 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:09:05,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-13 16:09:05,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:09:05,274 INFO L255 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-13 16:09:05,276 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:09:05,337 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-13 16:09:05,338 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:09:05,423 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-13 16:09:05,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194048396] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:09:05,424 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:09:05,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 13 [2024-11-13 16:09:05,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435035090] [2024-11-13 16:09:05,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:09:05,424 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-13 16:09:05,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:09:05,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-13 16:09:05,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2024-11-13 16:09:05,425 INFO L87 Difference]: Start difference. First operand 351 states and 408 transitions. Second operand has 13 states, 13 states have (on average 5.461538461538462) internal successors, (71), 12 states have internal predecessors, (71), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2024-11-13 16:09:05,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:09:05,628 INFO L93 Difference]: Finished difference Result 395 states and 453 transitions. [2024-11-13 16:09:05,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-13 16:09:05,629 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.461538461538462) internal successors, (71), 12 states have internal predecessors, (71), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 64 [2024-11-13 16:09:05,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:09:05,631 INFO L225 Difference]: With dead ends: 395 [2024-11-13 16:09:05,631 INFO L226 Difference]: Without dead ends: 395 [2024-11-13 16:09:05,632 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 131 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2024-11-13 16:09:05,632 INFO L432 NwaCegarLoop]: 68 mSDtfsCounter, 47 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-13 16:09:05,632 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 431 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-13 16:09:05,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2024-11-13 16:09:05,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 351. [2024-11-13 16:09:05,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 266 states have (on average 1.1654135338345866) internal successors, (310), 280 states have internal predecessors, (310), 48 states have call successors, (48), 24 states have call predecessors, (48), 24 states have return successors, (48), 46 states have call predecessors, (48), 48 states have call successors, (48) [2024-11-13 16:09:05,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 406 transitions. [2024-11-13 16:09:05,646 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 406 transitions. Word has length 64 [2024-11-13 16:09:05,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:09:05,646 INFO L471 AbstractCegarLoop]: Abstraction has 351 states and 406 transitions. [2024-11-13 16:09:05,646 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.461538461538462) internal successors, (71), 12 states have internal predecessors, (71), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2024-11-13 16:09:05,646 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 406 transitions. [2024-11-13 16:09:05,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-11-13 16:09:05,648 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:09:05,648 INFO L215 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:09:05,670 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-13 16:09:05,849 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:09:05,849 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-13 16:09:05,849 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:09:05,849 INFO L85 PathProgramCache]: Analyzing trace with hash 522295083, now seen corresponding path program 1 times [2024-11-13 16:09:05,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:09:05,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635394097] [2024-11-13 16:09:05,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:09:05,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:09:05,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:09:07,168 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 16:09:07,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:09:07,170 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-11-13 16:09:07,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:09:07,191 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-13 16:09:07,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:09:07,223 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-11-13 16:09:07,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:09:07,260 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-11-13 16:09:07,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:09:07,552 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-11-13 16:09:07,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:09:08,802 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-13 16:09:08,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:09:08,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635394097] [2024-11-13 16:09:08,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635394097] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:09:08,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778335390] [2024-11-13 16:09:08,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:09:08,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:09:08,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:09:08,804 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:09:08,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-13 16:09:08,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:09:08,947 INFO L255 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 61 conjuncts are in the unsatisfiable core [2024-11-13 16:09:08,950 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:09:09,238 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-13 16:09:09,516 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-11-13 16:09:09,580 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2024-11-13 16:09:09,831 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-13 16:09:09,831 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:09:10,101 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2024-11-13 16:09:10,111 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 25 [2024-11-13 16:09:10,288 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2024-11-13 16:09:11,029 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-13 16:09:11,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778335390] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:09:11,029 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:09:11,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 19, 17] total 56 [2024-11-13 16:09:11,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471106350] [2024-11-13 16:09:11,029 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:09:11,030 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2024-11-13 16:09:11,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:09:11,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2024-11-13 16:09:11,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=2857, Unknown=0, NotChecked=0, Total=3080 [2024-11-13 16:09:11,031 INFO L87 Difference]: Start difference. First operand 351 states and 406 transitions. Second operand has 56 states, 52 states have (on average 2.2884615384615383) internal successors, (119), 49 states have internal predecessors, (119), 10 states have call successors, (15), 3 states have call predecessors, (15), 7 states have return successors, (15), 10 states have call predecessors, (15), 10 states have call successors, (15) [2024-11-13 16:09:14,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:09:14,147 INFO L93 Difference]: Finished difference Result 488 states and 597 transitions. [2024-11-13 16:09:14,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-11-13 16:09:14,149 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 52 states have (on average 2.2884615384615383) internal successors, (119), 49 states have internal predecessors, (119), 10 states have call successors, (15), 3 states have call predecessors, (15), 7 states have return successors, (15), 10 states have call predecessors, (15), 10 states have call successors, (15) Word has length 65 [2024-11-13 16:09:14,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:09:14,151 INFO L225 Difference]: With dead ends: 488 [2024-11-13 16:09:14,151 INFO L226 Difference]: Without dead ends: 488 [2024-11-13 16:09:14,152 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1673 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=548, Invalid=6424, Unknown=0, NotChecked=0, Total=6972 [2024-11-13 16:09:14,153 INFO L432 NwaCegarLoop]: 46 mSDtfsCounter, 134 mSDsluCounter, 1156 mSDsCounter, 0 mSdLazyCounter, 1993 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 1202 SdHoareTripleChecker+Invalid, 2047 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1993 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-11-13 16:09:14,153 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 1202 Invalid, 2047 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1993 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2024-11-13 16:09:14,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2024-11-13 16:09:14,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 366. [2024-11-13 16:09:14,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 278 states have (on average 1.158273381294964) internal successors, (322), 293 states have internal predecessors, (322), 49 states have call successors, (49), 24 states have call predecessors, (49), 26 states have return successors, (52), 48 states have call predecessors, (52), 49 states have call successors, (52) [2024-11-13 16:09:14,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 423 transitions. [2024-11-13 16:09:14,167 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 423 transitions. Word has length 65 [2024-11-13 16:09:14,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:09:14,168 INFO L471 AbstractCegarLoop]: Abstraction has 366 states and 423 transitions. [2024-11-13 16:09:14,168 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 52 states have (on average 2.2884615384615383) internal successors, (119), 49 states have internal predecessors, (119), 10 states have call successors, (15), 3 states have call predecessors, (15), 7 states have return successors, (15), 10 states have call predecessors, (15), 10 states have call successors, (15) [2024-11-13 16:09:14,168 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 423 transitions. [2024-11-13 16:09:14,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2024-11-13 16:09:14,169 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:09:14,169 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 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] [2024-11-13 16:09:14,190 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-13 16:09:14,370 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-11-13 16:09:14,370 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting upsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-13 16:09:14,370 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:09:14,370 INFO L85 PathProgramCache]: Analyzing trace with hash 1390186980, now seen corresponding path program 4 times [2024-11-13 16:09:14,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:09:14,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070210132] [2024-11-13 16:09:14,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:09:14,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:09:14,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:09:14,723 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 16:09:14,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:09:14,725 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-11-13 16:09:14,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:09:14,741 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-11-13 16:09:14,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:09:14,743 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-11-13 16:09:14,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:09:14,746 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 22 proven. 45 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-13 16:09:14,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:09:14,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070210132] [2024-11-13 16:09:14,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070210132] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:09:14,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487483606] [2024-11-13 16:09:14,746 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-13 16:09:14,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:09:14,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:09:14,749 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:09:14,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-13 16:09:14,910 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-13 16:09:14,910 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 16:09:14,912 INFO L255 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-13 16:09:14,914 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:09:15,235 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 20 proven. 47 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-13 16:09:15,235 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:09:15,481 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 22 proven. 45 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-13 16:09:15,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487483606] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:09:15,481 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:09:15,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 31 [2024-11-13 16:09:15,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206958947] [2024-11-13 16:09:15,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:09:15,482 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-13 16:09:15,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:09:15,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-13 16:09:15,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=792, Unknown=0, NotChecked=0, Total=930 [2024-11-13 16:09:15,484 INFO L87 Difference]: Start difference. First operand 366 states and 423 transitions. Second operand has 31 states, 25 states have (on average 2.96) internal successors, (74), 26 states have internal predecessors, (74), 8 states have call successors, (13), 7 states have call predecessors, (13), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-13 16:09:16,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:09:16,289 INFO L93 Difference]: Finished difference Result 488 states and 565 transitions. [2024-11-13 16:09:16,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-11-13 16:09:16,290 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 25 states have (on average 2.96) internal successors, (74), 26 states have internal predecessors, (74), 8 states have call successors, (13), 7 states have call predecessors, (13), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 69 [2024-11-13 16:09:16,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:09:16,292 INFO L225 Difference]: With dead ends: 488 [2024-11-13 16:09:16,292 INFO L226 Difference]: Without dead ends: 488 [2024-11-13 16:09:16,292 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 121 SyntacticMatches, 8 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 683 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=302, Invalid=1954, Unknown=0, NotChecked=0, Total=2256 [2024-11-13 16:09:16,293 INFO L432 NwaCegarLoop]: 79 mSDtfsCounter, 78 mSDsluCounter, 771 mSDsCounter, 0 mSdLazyCounter, 898 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 850 SdHoareTripleChecker+Invalid, 936 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 898 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-13 16:09:16,293 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 850 Invalid, 936 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 898 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-13 16:09:16,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2024-11-13 16:09:16,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 408. [2024-11-13 16:09:16,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 313 states have (on average 1.1501597444089458) internal successors, (360), 330 states have internal predecessors, (360), 52 states have call successors, (52), 27 states have call predecessors, (52), 30 states have return successors, (56), 50 states have call predecessors, (56), 52 states have call successors, (56) [2024-11-13 16:09:16,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 468 transitions. [2024-11-13 16:09:16,307 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 468 transitions. Word has length 69 [2024-11-13 16:09:16,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:09:16,308 INFO L471 AbstractCegarLoop]: Abstraction has 408 states and 468 transitions. [2024-11-13 16:09:16,308 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 25 states have (on average 2.96) internal successors, (74), 26 states have internal predecessors, (74), 8 states have call successors, (13), 7 states have call predecessors, (13), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-13 16:09:16,308 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 468 transitions. [2024-11-13 16:09:16,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-11-13 16:09:16,309 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:09:16,309 INFO L215 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:09:16,331 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-11-13 16:09:16,513 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-11-13 16:09:16,513 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-13 16:09:16,513 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:09:16,513 INFO L85 PathProgramCache]: Analyzing trace with hash -988715498, now seen corresponding path program 1 times [2024-11-13 16:09:16,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:09:16,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324568356] [2024-11-13 16:09:16,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:09:16,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:09:16,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:09:16,613 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 16:09:16,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:09:16,615 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-11-13 16:09:16,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:09:16,624 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-13 16:09:16,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:09:16,627 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-11-13 16:09:16,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:09:16,630 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-11-13 16:09:16,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:09:16,638 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-11-13 16:09:16,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:09:16,646 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-13 16:09:16,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:09:16,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324568356] [2024-11-13 16:09:16,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324568356] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 16:09:16,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 16:09:16,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-13 16:09:16,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201023948] [2024-11-13 16:09:16,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 16:09:16,650 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-13 16:09:16,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:09:16,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-13 16:09:16,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-13 16:09:16,651 INFO L87 Difference]: Start difference. First operand 408 states and 468 transitions. Second operand has 6 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-13 16:09:16,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:09:16,794 INFO L93 Difference]: Finished difference Result 445 states and 509 transitions. [2024-11-13 16:09:16,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-13 16:09:16,795 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 66 [2024-11-13 16:09:16,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:09:16,797 INFO L225 Difference]: With dead ends: 445 [2024-11-13 16:09:16,797 INFO L226 Difference]: Without dead ends: 445 [2024-11-13 16:09:16,797 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 16:09:16,798 INFO L432 NwaCegarLoop]: 71 mSDtfsCounter, 40 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 16:09:16,798 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 258 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 16:09:16,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2024-11-13 16:09:16,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 407. [2024-11-13 16:09:16,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 313 states have (on average 1.1437699680511182) internal successors, (358), 329 states have internal predecessors, (358), 52 states have call successors, (52), 27 states have call predecessors, (52), 30 states have return successors, (56), 50 states have call predecessors, (56), 52 states have call successors, (56) [2024-11-13 16:09:16,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 466 transitions. [2024-11-13 16:09:16,811 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 466 transitions. Word has length 66 [2024-11-13 16:09:16,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:09:16,811 INFO L471 AbstractCegarLoop]: Abstraction has 407 states and 466 transitions. [2024-11-13 16:09:16,811 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-13 16:09:16,811 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 466 transitions. [2024-11-13 16:09:16,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-11-13 16:09:16,829 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:09:16,829 INFO L215 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:09:16,829 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-11-13 16:09:16,829 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-13 16:09:16,829 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:09:16,829 INFO L85 PathProgramCache]: Analyzing trace with hash -988715497, now seen corresponding path program 1 times [2024-11-13 16:09:16,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:09:16,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147270529] [2024-11-13 16:09:16,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:09:16,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:09:16,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:09:17,207 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 16:09:17,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:09:17,210 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-11-13 16:09:17,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:09:17,219 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-13 16:09:17,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:09:17,221 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-11-13 16:09:17,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:09:17,224 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-11-13 16:09:17,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:09:17,231 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-11-13 16:09:17,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:09:17,239 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-13 16:09:17,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:09:17,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147270529] [2024-11-13 16:09:17,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147270529] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:09:17,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253976203] [2024-11-13 16:09:17,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:09:17,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:09:17,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:09:17,242 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:09:17,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-13 16:09:17,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:09:17,408 INFO L255 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-13 16:09:17,410 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:09:17,671 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-13 16:09:17,671 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:09:17,767 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2024-11-13 16:09:17,845 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-13 16:09:17,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253976203] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:09:17,845 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:09:17,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 16 [2024-11-13 16:09:17,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143979812] [2024-11-13 16:09:17,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:09:17,846 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-13 16:09:17,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:09:17,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-13 16:09:17,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2024-11-13 16:09:17,847 INFO L87 Difference]: Start difference. First operand 407 states and 466 transitions. Second operand has 17 states, 16 states have (on average 6.5) internal successors, (104), 16 states have internal predecessors, (104), 6 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2024-11-13 16:09:18,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:09:18,215 INFO L93 Difference]: Finished difference Result 452 states and 514 transitions. [2024-11-13 16:09:18,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-13 16:09:18,216 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 6.5) internal successors, (104), 16 states have internal predecessors, (104), 6 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) Word has length 66 [2024-11-13 16:09:18,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:09:18,218 INFO L225 Difference]: With dead ends: 452 [2024-11-13 16:09:18,218 INFO L226 Difference]: Without dead ends: 452 [2024-11-13 16:09:18,218 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 130 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2024-11-13 16:09:18,219 INFO L432 NwaCegarLoop]: 57 mSDtfsCounter, 160 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-13 16:09:18,220 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 409 Invalid, 419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 407 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-13 16:09:18,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2024-11-13 16:09:18,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 410. [2024-11-13 16:09:18,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 317 states have (on average 1.138801261829653) internal successors, (361), 332 states have internal predecessors, (361), 52 states have call successors, (52), 27 states have call predecessors, (52), 30 states have return successors, (56), 50 states have call predecessors, (56), 52 states have call successors, (56) [2024-11-13 16:09:18,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 469 transitions. [2024-11-13 16:09:18,235 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 469 transitions. Word has length 66 [2024-11-13 16:09:18,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:09:18,235 INFO L471 AbstractCegarLoop]: Abstraction has 410 states and 469 transitions. [2024-11-13 16:09:18,236 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 6.5) internal successors, (104), 16 states have internal predecessors, (104), 6 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2024-11-13 16:09:18,236 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 469 transitions. [2024-11-13 16:09:18,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-11-13 16:09:18,237 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:09:18,237 INFO L215 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:09:18,258 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-13 16:09:18,437 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-13 16:09:18,437 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-13 16:09:18,438 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:09:18,438 INFO L85 PathProgramCache]: Analyzing trace with hash -293770042, now seen corresponding path program 1 times [2024-11-13 16:09:18,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:09:18,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326918711] [2024-11-13 16:09:18,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:09:18,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:09:18,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:09:20,472 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 16:09:20,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:09:20,474 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-11-13 16:09:20,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:09:20,494 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-13 16:09:20,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:09:20,521 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-11-13 16:09:20,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:09:20,560 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-11-13 16:09:20,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:09:20,836 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-11-13 16:09:20,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:09:22,124 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-13 16:09:22,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:09:22,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326918711] [2024-11-13 16:09:22,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326918711] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:09:22,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537834817] [2024-11-13 16:09:22,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:09:22,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:09:22,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:09:22,126 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:09:22,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-13 16:09:22,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:09:22,294 INFO L255 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 110 conjuncts are in the unsatisfiable core [2024-11-13 16:09:22,300 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:09:22,303 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-13 16:09:22,389 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2024-11-13 16:09:22,525 INFO L349 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2024-11-13 16:09:22,526 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 16 treesize of output 18 [2024-11-13 16:09:22,580 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 10 [2024-11-13 16:09:22,708 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2024-11-13 16:09:22,712 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 10 [2024-11-13 16:09:22,919 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 34 [2024-11-13 16:09:22,925 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 14 [2024-11-13 16:09:23,149 WARN L873 $PredicateComparison]: unable to prove that (exists ((v_upsweep_~a.offset_52 Int) (v_upsweep_~right_50 Int)) (and (<= |c_upsweep_#in~right| v_upsweep_~right_50) (<= |c_upsweep_#in~a.offset| v_upsweep_~a.offset_52) (= |c_#memory_int#1| (store |c_old(#memory_int#1)| |c_upsweep_#in~a.base| (let ((.cse0 (+ v_upsweep_~a.offset_52 (* v_upsweep_~right_50 4)))) (store (select |c_old(#memory_int#1)| |c_upsweep_#in~a.base|) .cse0 (select (select |c_#memory_int#1| |c_upsweep_#in~a.base|) .cse0))))))) is different from true [2024-11-13 16:09:23,177 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 38 [2024-11-13 16:09:23,301 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 41 [2024-11-13 16:09:23,812 WARN L873 $PredicateComparison]: unable to prove that (exists ((downsweep_~left Int)) (and (<= downsweep_~left |c_downsweep_#in~left|) (= |c_#memory_int#1| (store |c_old(#memory_int#1)| |c_downsweep_#in~a.base| (let ((.cse2 (+ |c_downsweep_#in~a.offset| (* downsweep_~left 4)))) (store (let ((.cse1 (+ |c_downsweep_#in~a.offset| (* |c_downsweep_#in~right| 4))) (.cse0 (select |c_old(#memory_int#1)| |c_downsweep_#in~a.base|))) (store .cse0 .cse1 (+ (select .cse0 .cse1) (select .cse0 .cse2)))) .cse2 (select (select |c_#memory_int#1| |c_downsweep_#in~a.base|) .cse2))))))) is different from true [2024-11-13 16:09:23,842 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 90 [2024-11-13 16:09:25,150 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 153 treesize of output 135 [2024-11-13 16:09:25,157 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2024-11-13 16:09:25,365 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 16:09:25,365 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:09:30,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537834817] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:09:30,232 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 16:09:30,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 31] total 59 [2024-11-13 16:09:30,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511480799] [2024-11-13 16:09:30,232 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 16:09:30,233 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2024-11-13 16:09:30,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:09:30,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2024-11-13 16:09:30,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=3662, Unknown=3, NotChecked=246, Total=4160 [2024-11-13 16:09:30,234 INFO L87 Difference]: Start difference. First operand 410 states and 469 transitions. Second operand has 59 states, 54 states have (on average 1.8703703703703705) internal successors, (101), 51 states have internal predecessors, (101), 8 states have call successors, (10), 3 states have call predecessors, (10), 8 states have return successors, (10), 9 states have call predecessors, (10), 8 states have call successors, (10) [2024-11-13 16:09:44,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:09:44,864 INFO L93 Difference]: Finished difference Result 518 states and 602 transitions. [2024-11-13 16:09:44,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-11-13 16:09:44,866 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 54 states have (on average 1.8703703703703705) internal successors, (101), 51 states have internal predecessors, (101), 8 states have call successors, (10), 3 states have call predecessors, (10), 8 states have return successors, (10), 9 states have call predecessors, (10), 8 states have call successors, (10) Word has length 72 [2024-11-13 16:09:44,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:09:44,869 INFO L225 Difference]: With dead ends: 518 [2024-11-13 16:09:44,869 INFO L226 Difference]: Without dead ends: 518 [2024-11-13 16:09:44,870 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 62 SyntacticMatches, 3 SemanticMatches, 93 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 2146 ImplicationChecksByTransitivity, 18.6s TimeCoverageRelationStatistics Valid=552, Invalid=8008, Unknown=4, NotChecked=366, Total=8930 [2024-11-13 16:09:44,871 INFO L432 NwaCegarLoop]: 44 mSDtfsCounter, 199 mSDsluCounter, 925 mSDsCounter, 0 mSdLazyCounter, 2122 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 969 SdHoareTripleChecker+Invalid, 2463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 2122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 294 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2024-11-13 16:09:44,871 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 969 Invalid, 2463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 2122 Invalid, 0 Unknown, 294 Unchecked, 4.0s Time] [2024-11-13 16:09:44,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2024-11-13 16:09:44,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 422. [2024-11-13 16:09:44,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 329 states have (on average 1.1337386018237081) internal successors, (373), 343 states have internal predecessors, (373), 52 states have call successors, (52), 27 states have call predecessors, (52), 30 states have return successors, (56), 51 states have call predecessors, (56), 52 states have call successors, (56) [2024-11-13 16:09:44,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 481 transitions. [2024-11-13 16:09:44,897 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 481 transitions. Word has length 72 [2024-11-13 16:09:44,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:09:44,897 INFO L471 AbstractCegarLoop]: Abstraction has 422 states and 481 transitions. [2024-11-13 16:09:44,898 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 54 states have (on average 1.8703703703703705) internal successors, (101), 51 states have internal predecessors, (101), 8 states have call successors, (10), 3 states have call predecessors, (10), 8 states have return successors, (10), 9 states have call predecessors, (10), 8 states have call successors, (10) [2024-11-13 16:09:44,898 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 481 transitions. [2024-11-13 16:09:44,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-11-13 16:09:44,899 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:09:44,899 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 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 16:09:44,923 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-13 16:09:45,099 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-11-13 16:09:45,100 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-13 16:09:45,101 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:09:45,101 INFO L85 PathProgramCache]: Analyzing trace with hash 676214570, now seen corresponding path program 2 times [2024-11-13 16:09:45,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:09:45,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978079245] [2024-11-13 16:09:45,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:09:45,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:09:45,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:09:45,434 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 16:09:45,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:09:45,436 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-11-13 16:09:45,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:09:45,481 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-11-13 16:09:45,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:09:45,483 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-11-13 16:09:45,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:09:45,486 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-11-13 16:09:45,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:09:45,794 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 15 proven. 30 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-13 16:09:45,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:09:45,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978079245] [2024-11-13 16:09:45,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978079245] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:09:45,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011791442] [2024-11-13 16:09:45,794 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 16:09:45,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:09:45,795 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:09:45,799 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:09:45,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-13 16:09:45,973 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 16:09:45,974 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 16:09:45,976 INFO L255 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-13 16:09:45,977 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:09:46,255 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 28 proven. 17 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-13 16:09:46,255 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:09:47,135 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 28 proven. 17 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-13 16:09:47,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011791442] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:09:47,136 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:09:47,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 20 [2024-11-13 16:09:47,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151150322] [2024-11-13 16:09:47,136 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:09:47,137 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-13 16:09:47,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:09:47,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-13 16:09:47,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2024-11-13 16:09:47,138 INFO L87 Difference]: Start difference. First operand 422 states and 481 transitions. Second operand has 20 states, 20 states have (on average 4.3) internal successors, (86), 19 states have internal predecessors, (86), 4 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-13 16:09:48,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:09:48,716 INFO L93 Difference]: Finished difference Result 492 states and 568 transitions. [2024-11-13 16:09:48,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-13 16:09:48,717 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.3) internal successors, (86), 19 states have internal predecessors, (86), 4 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 73 [2024-11-13 16:09:48,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:09:48,719 INFO L225 Difference]: With dead ends: 492 [2024-11-13 16:09:48,719 INFO L226 Difference]: Without dead ends: 480 [2024-11-13 16:09:48,720 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 144 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=154, Invalid=602, Unknown=0, NotChecked=0, Total=756 [2024-11-13 16:09:48,721 INFO L432 NwaCegarLoop]: 75 mSDtfsCounter, 29 mSDsluCounter, 517 mSDsCounter, 0 mSdLazyCounter, 444 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 592 SdHoareTripleChecker+Invalid, 454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-13 16:09:48,721 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 592 Invalid, 454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 444 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-13 16:09:48,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2024-11-13 16:09:48,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 373. [2024-11-13 16:09:48,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 290 states have (on average 1.1448275862068966) internal successors, (332), 301 states have internal predecessors, (332), 48 states have call successors, (48), 24 states have call predecessors, (48), 24 states have return successors, (48), 47 states have call predecessors, (48), 48 states have call successors, (48) [2024-11-13 16:09:48,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 428 transitions. [2024-11-13 16:09:48,735 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 428 transitions. Word has length 73 [2024-11-13 16:09:48,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:09:48,736 INFO L471 AbstractCegarLoop]: Abstraction has 373 states and 428 transitions. [2024-11-13 16:09:48,736 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.3) internal successors, (86), 19 states have internal predecessors, (86), 4 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-13 16:09:48,736 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 428 transitions. [2024-11-13 16:09:48,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2024-11-13 16:09:48,737 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:09:48,737 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 6, 5, 5, 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] [2024-11-13 16:09:48,760 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-11-13 16:09:48,938 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:09:48,938 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting upsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-13 16:09:48,938 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:09:48,939 INFO L85 PathProgramCache]: Analyzing trace with hash -1700446996, now seen corresponding path program 5 times [2024-11-13 16:09:48,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:09:48,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890356009] [2024-11-13 16:09:48,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:09:48,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:09:48,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:09:50,075 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 16:09:50,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:09:50,076 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-11-13 16:09:50,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:09:50,142 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-11-13 16:09:50,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:09:50,144 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-11-13 16:09:50,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:09:50,146 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 31 proven. 91 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-13 16:09:50,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:09:50,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890356009] [2024-11-13 16:09:50,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890356009] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:09:50,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754002842] [2024-11-13 16:09:50,147 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-13 16:09:50,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:09:50,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:09:50,150 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:09:50,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-13 16:09:50,525 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2024-11-13 16:09:50,525 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 16:09:50,528 INFO L255 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-11-13 16:09:50,530 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:09:52,467 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 24 proven. 98 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-13 16:09:52,467 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:10:01,080 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 40 proven. 91 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-13 16:10:01,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754002842] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:10:01,080 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:10:01,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 26] total 57 [2024-11-13 16:10:01,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558246534] [2024-11-13 16:10:01,081 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:10:01,081 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2024-11-13 16:10:01,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:10:01,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2024-11-13 16:10:01,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=445, Invalid=2747, Unknown=0, NotChecked=0, Total=3192 [2024-11-13 16:10:01,083 INFO L87 Difference]: Start difference. First operand 373 states and 428 transitions. Second operand has 57 states, 46 states have (on average 2.6956521739130435) internal successors, (124), 47 states have internal predecessors, (124), 13 states have call successors, (18), 12 states have call predecessors, (18), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-13 16:10:11,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:10:11,546 INFO L93 Difference]: Finished difference Result 750 states and 858 transitions. [2024-11-13 16:10:11,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2024-11-13 16:10:11,547 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 46 states have (on average 2.6956521739130435) internal successors, (124), 47 states have internal predecessors, (124), 13 states have call successors, (18), 12 states have call predecessors, (18), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 77 [2024-11-13 16:10:11,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:10:11,550 INFO L225 Difference]: With dead ends: 750 [2024-11-13 16:10:11,550 INFO L226 Difference]: Without dead ends: 750 [2024-11-13 16:10:11,552 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 121 SyntacticMatches, 3 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3587 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=1359, Invalid=8943, Unknown=0, NotChecked=0, Total=10302 [2024-11-13 16:10:11,553 INFO L432 NwaCegarLoop]: 84 mSDtfsCounter, 169 mSDsluCounter, 1512 mSDsCounter, 0 mSdLazyCounter, 2060 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 1596 SdHoareTripleChecker+Invalid, 2137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 2060 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2024-11-13 16:10:11,553 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [175 Valid, 1596 Invalid, 2137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 2060 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2024-11-13 16:10:11,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 750 states. [2024-11-13 16:10:11,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 750 to 651. [2024-11-13 16:10:11,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 651 states, 510 states have (on average 1.1549019607843136) internal successors, (589), 523 states have internal predecessors, (589), 82 states have call successors, (82), 48 states have call predecessors, (82), 48 states have return successors, (82), 79 states have call predecessors, (82), 82 states have call successors, (82) [2024-11-13 16:10:11,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 651 states to 651 states and 753 transitions. [2024-11-13 16:10:11,572 INFO L78 Accepts]: Start accepts. Automaton has 651 states and 753 transitions. Word has length 77 [2024-11-13 16:10:11,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:10:11,573 INFO L471 AbstractCegarLoop]: Abstraction has 651 states and 753 transitions. [2024-11-13 16:10:11,573 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 46 states have (on average 2.6956521739130435) internal successors, (124), 47 states have internal predecessors, (124), 13 states have call successors, (18), 12 states have call predecessors, (18), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-13 16:10:11,573 INFO L276 IsEmpty]: Start isEmpty. Operand 651 states and 753 transitions. [2024-11-13 16:10:11,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2024-11-13 16:10:11,574 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:10:11,574 INFO L215 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:10:11,596 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-11-13 16:10:11,774 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2024-11-13 16:10:11,775 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-13 16:10:11,775 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:10:11,775 INFO L85 PathProgramCache]: Analyzing trace with hash 1873408909, now seen corresponding path program 1 times [2024-11-13 16:10:11,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:10:11,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043314428] [2024-11-13 16:10:11,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:10:11,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:10:11,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:10:12,276 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 16:10:12,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:10:12,281 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-11-13 16:10:12,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:10:12,335 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-13 16:10:12,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:10:12,341 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-11-13 16:10:12,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:10:12,343 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-11-13 16:10:12,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:10:12,349 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-11-13 16:10:12,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:10:12,354 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-13 16:10:12,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:10:12,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043314428] [2024-11-13 16:10:12,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043314428] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:10:12,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874077877] [2024-11-13 16:10:12,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:10:12,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:10:12,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:10:12,357 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:10:12,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-13 16:10:12,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:10:12,536 INFO L255 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-13 16:10:12,538 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:10:12,978 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-13 16:10:12,978 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:10:13,379 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-13 16:10:13,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874077877] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:10:13,379 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:10:13,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 16 [2024-11-13 16:10:13,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114045769] [2024-11-13 16:10:13,380 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:10:13,380 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-13 16:10:13,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:10:13,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-13 16:10:13,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2024-11-13 16:10:13,382 INFO L87 Difference]: Start difference. First operand 651 states and 753 transitions. Second operand has 16 states, 16 states have (on average 5.8125) internal successors, (93), 15 states have internal predecessors, (93), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-13 16:10:14,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:10:14,230 INFO L93 Difference]: Finished difference Result 735 states and 850 transitions. [2024-11-13 16:10:14,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-13 16:10:14,231 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.8125) internal successors, (93), 15 states have internal predecessors, (93), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 76 [2024-11-13 16:10:14,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:10:14,234 INFO L225 Difference]: With dead ends: 735 [2024-11-13 16:10:14,234 INFO L226 Difference]: Without dead ends: 735 [2024-11-13 16:10:14,234 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 154 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2024-11-13 16:10:14,234 INFO L432 NwaCegarLoop]: 69 mSDtfsCounter, 20 mSDsluCounter, 603 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 672 SdHoareTripleChecker+Invalid, 355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-13 16:10:14,235 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 672 Invalid, 355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-13 16:10:14,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 735 states. [2024-11-13 16:10:14,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 735 to 655. [2024-11-13 16:10:14,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 655 states, 514 states have (on average 1.1536964980544746) internal successors, (593), 527 states have internal predecessors, (593), 82 states have call successors, (82), 48 states have call predecessors, (82), 48 states have return successors, (82), 79 states have call predecessors, (82), 82 states have call successors, (82) [2024-11-13 16:10:14,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 655 states to 655 states and 757 transitions. [2024-11-13 16:10:14,252 INFO L78 Accepts]: Start accepts. Automaton has 655 states and 757 transitions. Word has length 76 [2024-11-13 16:10:14,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:10:14,253 INFO L471 AbstractCegarLoop]: Abstraction has 655 states and 757 transitions. [2024-11-13 16:10:14,253 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.8125) internal successors, (93), 15 states have internal predecessors, (93), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-13 16:10:14,253 INFO L276 IsEmpty]: Start isEmpty. Operand 655 states and 757 transitions. [2024-11-13 16:10:14,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2024-11-13 16:10:14,254 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:10:14,254 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 4, 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 16:10:14,274 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-11-13 16:10:14,454 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2024-11-13 16:10:14,455 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting upsweepErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-13 16:10:14,455 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:10:14,455 INFO L85 PathProgramCache]: Analyzing trace with hash -972998598, now seen corresponding path program 1 times [2024-11-13 16:10:14,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:10:14,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400738111] [2024-11-13 16:10:14,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:10:14,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:10:14,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:10:14,636 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 16:10:14,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:10:14,638 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-11-13 16:10:14,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:10:14,674 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-11-13 16:10:14,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:10:14,676 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-11-13 16:10:14,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:10:14,678 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-11-13 16:10:14,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:10:14,896 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2024-11-13 16:10:14,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:10:14,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400738111] [2024-11-13 16:10:14,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400738111] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:10:14,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617042546] [2024-11-13 16:10:14,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:10:14,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:10:14,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:10:14,898 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:10:14,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-13 16:10:15,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:10:15,069 INFO L255 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-13 16:10:15,070 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:10:15,325 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2024-11-13 16:10:15,325 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:10:15,717 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2024-11-13 16:10:15,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617042546] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:10:15,717 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:10:15,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 6] total 11 [2024-11-13 16:10:15,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470755751] [2024-11-13 16:10:15,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:10:15,718 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-13 16:10:15,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:10:15,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-13 16:10:15,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-11-13 16:10:15,718 INFO L87 Difference]: Start difference. First operand 655 states and 757 transitions. Second operand has 11 states, 10 states have (on average 4.3) internal successors, (43), 9 states have internal predecessors, (43), 3 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2024-11-13 16:10:16,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:10:16,371 INFO L93 Difference]: Finished difference Result 887 states and 1039 transitions. [2024-11-13 16:10:16,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-13 16:10:16,372 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.3) internal successors, (43), 9 states have internal predecessors, (43), 3 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 78 [2024-11-13 16:10:16,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:10:16,375 INFO L225 Difference]: With dead ends: 887 [2024-11-13 16:10:16,376 INFO L226 Difference]: Without dead ends: 887 [2024-11-13 16:10:16,376 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 160 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2024-11-13 16:10:16,376 INFO L432 NwaCegarLoop]: 72 mSDtfsCounter, 22 mSDsluCounter, 448 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 520 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-13 16:10:16,376 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 520 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-13 16:10:16,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 887 states. [2024-11-13 16:10:16,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 887 to 860. [2024-11-13 16:10:16,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 860 states, 672 states have (on average 1.1398809523809523) internal successors, (766), 697 states have internal predecessors, (766), 103 states have call successors, (103), 62 states have call predecessors, (103), 74 states have return successors, (145), 100 states have call predecessors, (145), 103 states have call successors, (145) [2024-11-13 16:10:16,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 860 states to 860 states and 1014 transitions. [2024-11-13 16:10:16,402 INFO L78 Accepts]: Start accepts. Automaton has 860 states and 1014 transitions. Word has length 78 [2024-11-13 16:10:16,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:10:16,402 INFO L471 AbstractCegarLoop]: Abstraction has 860 states and 1014 transitions. [2024-11-13 16:10:16,402 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.3) internal successors, (43), 9 states have internal predecessors, (43), 3 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2024-11-13 16:10:16,403 INFO L276 IsEmpty]: Start isEmpty. Operand 860 states and 1014 transitions. [2024-11-13 16:10:16,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2024-11-13 16:10:16,404 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:10:16,404 INFO L215 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:10:16,427 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-11-13 16:10:16,605 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:10:16,605 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-13 16:10:16,605 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:10:16,605 INFO L85 PathProgramCache]: Analyzing trace with hash 754628580, now seen corresponding path program 1 times [2024-11-13 16:10:16,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:10:16,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824617663] [2024-11-13 16:10:16,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:10:16,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:10:16,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:10:16,710 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 16:10:16,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:10:16,712 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-11-13 16:10:16,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:10:16,738 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-13 16:10:16,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:10:16,741 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-11-13 16:10:16,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:10:16,743 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-11-13 16:10:16,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:10:16,748 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-11-13 16:10:16,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:10:16,756 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-13 16:10:16,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:10:16,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824617663] [2024-11-13 16:10:16,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824617663] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 16:10:16,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 16:10:16,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-13 16:10:16,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543734378] [2024-11-13 16:10:16,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 16:10:16,757 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 16:10:16,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:10:16,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 16:10:16,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-13 16:10:16,758 INFO L87 Difference]: Start difference. First operand 860 states and 1014 transitions. Second operand has 5 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-13 16:10:17,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:10:17,036 INFO L93 Difference]: Finished difference Result 861 states and 1013 transitions. [2024-11-13 16:10:17,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 16:10:17,037 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 78 [2024-11-13 16:10:17,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:10:17,041 INFO L225 Difference]: With dead ends: 861 [2024-11-13 16:10:17,041 INFO L226 Difference]: Without dead ends: 861 [2024-11-13 16:10:17,041 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-13 16:10:17,042 INFO L432 NwaCegarLoop]: 72 mSDtfsCounter, 22 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-13 16:10:17,042 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 215 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-13 16:10:17,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 861 states. [2024-11-13 16:10:17,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 861 to 859. [2024-11-13 16:10:17,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 859 states, 672 states have (on average 1.1383928571428572) internal successors, (765), 696 states have internal predecessors, (765), 103 states have call successors, (103), 62 states have call predecessors, (103), 74 states have return successors, (145), 100 states have call predecessors, (145), 103 states have call successors, (145) [2024-11-13 16:10:17,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 859 states to 859 states and 1013 transitions. [2024-11-13 16:10:17,067 INFO L78 Accepts]: Start accepts. Automaton has 859 states and 1013 transitions. Word has length 78 [2024-11-13 16:10:17,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:10:17,067 INFO L471 AbstractCegarLoop]: Abstraction has 859 states and 1013 transitions. [2024-11-13 16:10:17,067 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-13 16:10:17,068 INFO L276 IsEmpty]: Start isEmpty. Operand 859 states and 1013 transitions. [2024-11-13 16:10:17,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2024-11-13 16:10:17,069 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:10:17,069 INFO L215 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:10:17,069 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-11-13 16:10:17,070 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-13 16:10:17,070 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:10:17,070 INFO L85 PathProgramCache]: Analyzing trace with hash 1281370378, now seen corresponding path program 1 times [2024-11-13 16:10:17,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:10:17,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620459889] [2024-11-13 16:10:17,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:10:17,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:10:17,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:10:17,180 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 16:10:17,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:10:17,182 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-11-13 16:10:17,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:10:17,211 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-13 16:10:17,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:10:17,213 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-11-13 16:10:17,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:10:17,217 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-11-13 16:10:17,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:10:17,224 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-11-13 16:10:17,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:10:17,231 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-13 16:10:17,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:10:17,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620459889] [2024-11-13 16:10:17,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620459889] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 16:10:17,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 16:10:17,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-13 16:10:17,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720816618] [2024-11-13 16:10:17,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 16:10:17,232 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 16:10:17,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:10:17,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 16:10:17,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-13 16:10:17,232 INFO L87 Difference]: Start difference. First operand 859 states and 1013 transitions. Second operand has 5 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-13 16:10:17,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:10:17,529 INFO L93 Difference]: Finished difference Result 860 states and 1012 transitions. [2024-11-13 16:10:17,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 16:10:17,530 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 81 [2024-11-13 16:10:17,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:10:17,533 INFO L225 Difference]: With dead ends: 860 [2024-11-13 16:10:17,534 INFO L226 Difference]: Without dead ends: 860 [2024-11-13 16:10:17,534 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-13 16:10:17,535 INFO L432 NwaCegarLoop]: 70 mSDtfsCounter, 22 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-13 16:10:17,535 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 210 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-13 16:10:17,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 860 states. [2024-11-13 16:10:17,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 860 to 858. [2024-11-13 16:10:17,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 858 states, 672 states have (on average 1.1369047619047619) internal successors, (764), 695 states have internal predecessors, (764), 103 states have call successors, (103), 62 states have call predecessors, (103), 74 states have return successors, (145), 100 states have call predecessors, (145), 103 states have call successors, (145) [2024-11-13 16:10:17,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 858 states to 858 states and 1012 transitions. [2024-11-13 16:10:17,561 INFO L78 Accepts]: Start accepts. Automaton has 858 states and 1012 transitions. Word has length 81 [2024-11-13 16:10:17,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:10:17,562 INFO L471 AbstractCegarLoop]: Abstraction has 858 states and 1012 transitions. [2024-11-13 16:10:17,562 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-13 16:10:17,562 INFO L276 IsEmpty]: Start isEmpty. Operand 858 states and 1012 transitions. [2024-11-13 16:10:17,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2024-11-13 16:10:17,563 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:10:17,563 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 5, 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] [2024-11-13 16:10:17,563 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-11-13 16:10:17,563 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting upsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-13 16:10:17,563 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:10:17,568 INFO L85 PathProgramCache]: Analyzing trace with hash -121164011, now seen corresponding path program 1 times [2024-11-13 16:10:17,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:10:17,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902978061] [2024-11-13 16:10:17,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:10:17,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:10:17,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:10:18,919 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 16:10:18,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:10:18,921 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-11-13 16:10:18,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:10:18,992 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-11-13 16:10:18,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:10:18,995 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-11-13 16:10:18,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:10:18,999 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2024-11-13 16:10:19,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:10:19,342 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-13 16:10:19,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:10:19,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902978061] [2024-11-13 16:10:19,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902978061] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:10:19,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652874473] [2024-11-13 16:10:19,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:10:19,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:10:19,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:10:19,346 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:10:19,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-13 16:10:19,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:10:19,547 INFO L255 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-11-13 16:10:19,549 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:10:22,832 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 14 proven. 130 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-13 16:10:22,832 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:10:28,112 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 14 proven. 130 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-13 16:10:28,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652874473] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:10:28,112 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:10:28,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 71 [2024-11-13 16:10:28,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349094644] [2024-11-13 16:10:28,112 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:10:28,113 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2024-11-13 16:10:28,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:10:28,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2024-11-13 16:10:28,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=452, Invalid=4518, Unknown=0, NotChecked=0, Total=4970 [2024-11-13 16:10:28,115 INFO L87 Difference]: Start difference. First operand 858 states and 1012 transitions. Second operand has 71 states, 62 states have (on average 2.5806451612903225) internal successors, (160), 61 states have internal predecessors, (160), 20 states have call successors, (21), 12 states have call predecessors, (21), 3 states have return successors, (11), 8 states have call predecessors, (11), 10 states have call successors, (11) [2024-11-13 16:10:43,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:10:43,716 INFO L93 Difference]: Finished difference Result 945 states and 1113 transitions. [2024-11-13 16:10:43,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2024-11-13 16:10:43,717 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 62 states have (on average 2.5806451612903225) internal successors, (160), 61 states have internal predecessors, (160), 20 states have call successors, (21), 12 states have call predecessors, (21), 3 states have return successors, (11), 8 states have call predecessors, (11), 10 states have call successors, (11) Word has length 84 [2024-11-13 16:10:43,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:10:43,721 INFO L225 Difference]: With dead ends: 945 [2024-11-13 16:10:43,721 INFO L226 Difference]: Without dead ends: 927 [2024-11-13 16:10:43,723 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 130 SyntacticMatches, 1 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5188 ImplicationChecksByTransitivity, 14.2s TimeCoverageRelationStatistics Valid=1420, Invalid=14330, Unknown=0, NotChecked=0, Total=15750 [2024-11-13 16:10:43,723 INFO L432 NwaCegarLoop]: 77 mSDtfsCounter, 222 mSDsluCounter, 1990 mSDsCounter, 0 mSdLazyCounter, 3506 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 2067 SdHoareTripleChecker+Invalid, 3587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 3506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.1s IncrementalHoareTripleChecker+Time [2024-11-13 16:10:43,724 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [226 Valid, 2067 Invalid, 3587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 3506 Invalid, 0 Unknown, 0 Unchecked, 9.1s Time] [2024-11-13 16:10:43,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 927 states. [2024-11-13 16:10:43,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 927 to 904. [2024-11-13 16:10:43,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 904 states, 707 states have (on average 1.1315417256011315) internal successors, (800), 732 states have internal predecessors, (800), 109 states have call successors, (109), 66 states have call predecessors, (109), 79 states have return successors, (153), 105 states have call predecessors, (153), 109 states have call successors, (153) [2024-11-13 16:10:43,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 1062 transitions. [2024-11-13 16:10:43,750 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 1062 transitions. Word has length 84 [2024-11-13 16:10:43,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:10:43,751 INFO L471 AbstractCegarLoop]: Abstraction has 904 states and 1062 transitions. [2024-11-13 16:10:43,751 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 62 states have (on average 2.5806451612903225) internal successors, (160), 61 states have internal predecessors, (160), 20 states have call successors, (21), 12 states have call predecessors, (21), 3 states have return successors, (11), 8 states have call predecessors, (11), 10 states have call successors, (11) [2024-11-13 16:10:43,751 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 1062 transitions. [2024-11-13 16:10:43,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2024-11-13 16:10:43,752 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:10:43,752 INFO L215 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:10:43,775 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-11-13 16:10:43,953 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2024-11-13 16:10:43,953 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-13 16:10:43,954 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:10:43,954 INFO L85 PathProgramCache]: Analyzing trace with hash 1067776232, now seen corresponding path program 1 times [2024-11-13 16:10:43,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:10:43,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556273118] [2024-11-13 16:10:43,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:10:43,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:10:43,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:10:44,228 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 16:10:44,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:10:44,235 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-11-13 16:10:44,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:10:44,275 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-13 16:10:44,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:10:44,278 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-11-13 16:10:44,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:10:44,281 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-11-13 16:10:44,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:10:44,289 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-11-13 16:10:44,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:10:44,298 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-13 16:10:44,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:10:44,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556273118] [2024-11-13 16:10:44,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556273118] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 16:10:44,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 16:10:44,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-13 16:10:44,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049560644] [2024-11-13 16:10:44,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 16:10:44,299 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-13 16:10:44,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:10:44,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-13 16:10:44,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-13 16:10:44,300 INFO L87 Difference]: Start difference. First operand 904 states and 1062 transitions. Second operand has 7 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-13 16:10:44,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:10:44,821 INFO L93 Difference]: Finished difference Result 905 states and 1061 transitions. [2024-11-13 16:10:44,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-13 16:10:44,821 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 82 [2024-11-13 16:10:44,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:10:44,825 INFO L225 Difference]: With dead ends: 905 [2024-11-13 16:10:44,825 INFO L226 Difference]: Without dead ends: 905 [2024-11-13 16:10:44,825 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-13 16:10:44,826 INFO L432 NwaCegarLoop]: 64 mSDtfsCounter, 25 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-13 16:10:44,826 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 239 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-13 16:10:44,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 905 states. [2024-11-13 16:10:44,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 905 to 903. [2024-11-13 16:10:44,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 903 states, 707 states have (on average 1.1301272984441302) internal successors, (799), 731 states have internal predecessors, (799), 109 states have call successors, (109), 66 states have call predecessors, (109), 79 states have return successors, (153), 105 states have call predecessors, (153), 109 states have call successors, (153) [2024-11-13 16:10:44,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 903 states to 903 states and 1061 transitions. [2024-11-13 16:10:44,847 INFO L78 Accepts]: Start accepts. Automaton has 903 states and 1061 transitions. Word has length 82 [2024-11-13 16:10:44,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:10:44,848 INFO L471 AbstractCegarLoop]: Abstraction has 903 states and 1061 transitions. [2024-11-13 16:10:44,848 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-13 16:10:44,848 INFO L276 IsEmpty]: Start isEmpty. Operand 903 states and 1061 transitions. [2024-11-13 16:10:44,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2024-11-13 16:10:44,849 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:10:44,849 INFO L215 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:10:44,849 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-11-13 16:10:44,850 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_LEAK === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-13 16:10:44,850 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:10:44,850 INFO L85 PathProgramCache]: Analyzing trace with hash -1258674995, now seen corresponding path program 1 times [2024-11-13 16:10:44,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:10:44,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737493967] [2024-11-13 16:10:44,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:10:44,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:10:44,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:10:45,251 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 16:10:45,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:10:45,253 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-11-13 16:10:45,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:10:45,286 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-13 16:10:45,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:10:45,289 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-11-13 16:10:45,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:10:45,293 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-11-13 16:10:45,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:10:45,297 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-11-13 16:10:45,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:10:45,305 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-13 16:10:45,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:10:45,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737493967] [2024-11-13 16:10:45,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737493967] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 16:10:45,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 16:10:45,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-13 16:10:45,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524928890] [2024-11-13 16:10:45,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 16:10:45,307 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-13 16:10:45,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:10:45,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-13 16:10:45,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-11-13 16:10:45,308 INFO L87 Difference]: Start difference. First operand 903 states and 1061 transitions. Second operand has 8 states, 7 states have (on average 7.857142857142857) internal successors, (55), 7 states have internal predecessors, (55), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-13 16:10:45,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:10:45,880 INFO L93 Difference]: Finished difference Result 904 states and 1060 transitions. [2024-11-13 16:10:45,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-13 16:10:45,881 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 7.857142857142857) internal successors, (55), 7 states have internal predecessors, (55), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 83 [2024-11-13 16:10:45,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:10:45,885 INFO L225 Difference]: With dead ends: 904 [2024-11-13 16:10:45,885 INFO L226 Difference]: Without dead ends: 841 [2024-11-13 16:10:45,885 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 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 16:10:45,886 INFO L432 NwaCegarLoop]: 62 mSDtfsCounter, 21 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-13 16:10:45,886 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 317 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-13 16:10:45,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 841 states. [2024-11-13 16:10:45,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 841 to 839. [2024-11-13 16:10:45,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 839 states, 651 states have (on average 1.1382488479262673) internal successors, (741), 674 states have internal predecessors, (741), 104 states have call successors, (104), 64 states have call predecessors, (104), 77 states have return successors, (148), 100 states have call predecessors, (148), 104 states have call successors, (148) [2024-11-13 16:10:45,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 839 states to 839 states and 993 transitions. [2024-11-13 16:10:45,908 INFO L78 Accepts]: Start accepts. Automaton has 839 states and 993 transitions. Word has length 83 [2024-11-13 16:10:45,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:10:45,909 INFO L471 AbstractCegarLoop]: Abstraction has 839 states and 993 transitions. [2024-11-13 16:10:45,909 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 7.857142857142857) internal successors, (55), 7 states have internal predecessors, (55), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-13 16:10:45,909 INFO L276 IsEmpty]: Start isEmpty. Operand 839 states and 993 transitions. [2024-11-13 16:10:45,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2024-11-13 16:10:45,910 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:10:45,910 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:10:45,910 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-11-13 16:10:45,911 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-13 16:10:45,911 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:10:45,911 INFO L85 PathProgramCache]: Analyzing trace with hash 774722137, now seen corresponding path program 1 times [2024-11-13 16:10:45,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:10:45,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732995077] [2024-11-13 16:10:45,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:10:45,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:10:45,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:10:47,118 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 16:10:47,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:10:47,119 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-11-13 16:10:47,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:10:47,177 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-11-13 16:10:47,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:10:47,180 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-11-13 16:10:47,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:10:47,182 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-11-13 16:10:47,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:10:47,199 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 16:10:47,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:10:47,202 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-11-13 16:10:47,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:10:47,205 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-11-13 16:10:47,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:10:47,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732995077] [2024-11-13 16:10:47,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732995077] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:10:47,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470000988] [2024-11-13 16:10:47,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:10:47,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:10:47,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:10:47,207 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:10:47,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-13 16:10:47,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:10:47,409 INFO L255 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 60 conjuncts are in the unsatisfiable core [2024-11-13 16:10:47,412 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:10:50,054 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 13 proven. 35 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-13 16:10:50,055 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:10:51,519 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 72 [2024-11-13 16:10:52,249 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 16:10:52,249 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 30 [2024-11-13 16:10:52,704 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 16:10:52,704 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2024-11-13 16:10:54,331 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 42 proven. 9 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-13 16:10:54,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470000988] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:10:54,331 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:10:54,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 49 [2024-11-13 16:10:54,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935366087] [2024-11-13 16:10:54,332 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:10:54,332 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-11-13 16:10:54,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:10:54,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-11-13 16:10:54,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=2207, Unknown=0, NotChecked=0, Total=2450 [2024-11-13 16:10:54,333 INFO L87 Difference]: Start difference. First operand 839 states and 993 transitions. Second operand has 50 states, 48 states have (on average 3.1458333333333335) internal successors, (151), 43 states have internal predecessors, (151), 19 states have call successors, (24), 8 states have call predecessors, (24), 4 states have return successors, (18), 15 states have call predecessors, (18), 13 states have call successors, (18) [2024-11-13 16:11:02,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:11:02,581 INFO L93 Difference]: Finished difference Result 881 states and 1045 transitions. [2024-11-13 16:11:02,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-11-13 16:11:02,582 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 48 states have (on average 3.1458333333333335) internal successors, (151), 43 states have internal predecessors, (151), 19 states have call successors, (24), 8 states have call predecessors, (24), 4 states have return successors, (18), 15 states have call predecessors, (18), 13 states have call successors, (18) Word has length 88 [2024-11-13 16:11:02,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:11:02,584 INFO L225 Difference]: With dead ends: 881 [2024-11-13 16:11:02,584 INFO L226 Difference]: Without dead ends: 881 [2024-11-13 16:11:02,585 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1652 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=634, Invalid=6172, Unknown=0, NotChecked=0, Total=6806 [2024-11-13 16:11:02,585 INFO L432 NwaCegarLoop]: 49 mSDtfsCounter, 221 mSDsluCounter, 675 mSDsCounter, 0 mSdLazyCounter, 1747 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 724 SdHoareTripleChecker+Invalid, 1811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1747 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2024-11-13 16:11:02,586 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [222 Valid, 724 Invalid, 1811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1747 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2024-11-13 16:11:02,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 881 states. [2024-11-13 16:11:02,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 881 to 866. [2024-11-13 16:11:02,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 866 states, 673 states have (on average 1.138187221396731) internal successors, (766), 695 states have internal predecessors, (766), 108 states have call successors, (108), 66 states have call predecessors, (108), 79 states have return successors, (152), 104 states have call predecessors, (152), 108 states have call successors, (152) [2024-11-13 16:11:02,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 1026 transitions. [2024-11-13 16:11:02,611 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 1026 transitions. Word has length 88 [2024-11-13 16:11:02,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:11:02,611 INFO L471 AbstractCegarLoop]: Abstraction has 866 states and 1026 transitions. [2024-11-13 16:11:02,612 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 48 states have (on average 3.1458333333333335) internal successors, (151), 43 states have internal predecessors, (151), 19 states have call successors, (24), 8 states have call predecessors, (24), 4 states have return successors, (18), 15 states have call predecessors, (18), 13 states have call successors, (18) [2024-11-13 16:11:02,612 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 1026 transitions. [2024-11-13 16:11:02,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2024-11-13 16:11:02,613 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:11:02,613 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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 16:11:02,635 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-11-13 16:11:02,813 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-11-13 16:11:02,814 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting downsweepErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-13 16:11:02,814 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:11:02,814 INFO L85 PathProgramCache]: Analyzing trace with hash -1407112966, now seen corresponding path program 1 times [2024-11-13 16:11:02,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:11:02,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802503739] [2024-11-13 16:11:02,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:11:02,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:11:02,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:11:03,717 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 16:11:03,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:11:03,719 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-11-13 16:11:03,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:11:03,769 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-11-13 16:11:03,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:11:03,771 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-11-13 16:11:03,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:11:03,773 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-11-13 16:11:03,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:11:03,786 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 16:11:03,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:11:03,788 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-11-13 16:11:03,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:11:03,792 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-11-13 16:11:03,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:11:03,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802503739] [2024-11-13 16:11:03,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802503739] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:11:03,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950850585] [2024-11-13 16:11:03,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:11:03,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:11:03,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:11:03,797 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:11:03,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-13 16:11:04,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:11:04,007 INFO L255 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-11-13 16:11:04,010 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:11:07,252 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-13 16:11:07,253 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:11:07,423 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2024-11-13 16:11:14,295 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 28 proven. 5 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-11-13 16:11:14,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950850585] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:11:14,295 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:11:14,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 14] total 43 [2024-11-13 16:11:14,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386634137] [2024-11-13 16:11:14,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:11:14,296 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-11-13 16:11:14,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:11:14,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-11-13 16:11:14,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1706, Unknown=0, NotChecked=0, Total=1892 [2024-11-13 16:11:14,297 INFO L87 Difference]: Start difference. First operand 866 states and 1026 transitions. Second operand has 44 states, 40 states have (on average 3.35) internal successors, (134), 37 states have internal predecessors, (134), 14 states have call successors, (22), 8 states have call predecessors, (22), 1 states have return successors, (14), 11 states have call predecessors, (14), 11 states have call successors, (14) [2024-11-13 16:11:24,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:11:24,121 INFO L93 Difference]: Finished difference Result 958 states and 1136 transitions. [2024-11-13 16:11:24,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-11-13 16:11:24,122 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 40 states have (on average 3.35) internal successors, (134), 37 states have internal predecessors, (134), 14 states have call successors, (22), 8 states have call predecessors, (22), 1 states have return successors, (14), 11 states have call predecessors, (14), 11 states have call successors, (14) Word has length 91 [2024-11-13 16:11:24,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:11:24,126 INFO L225 Difference]: With dead ends: 958 [2024-11-13 16:11:24,126 INFO L226 Difference]: Without dead ends: 958 [2024-11-13 16:11:24,126 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 166 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1604 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=825, Invalid=5981, Unknown=0, NotChecked=0, Total=6806 [2024-11-13 16:11:24,130 INFO L432 NwaCegarLoop]: 51 mSDtfsCounter, 283 mSDsluCounter, 984 mSDsCounter, 0 mSdLazyCounter, 1178 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 1035 SdHoareTripleChecker+Invalid, 1289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 1178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2024-11-13 16:11:24,130 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [283 Valid, 1035 Invalid, 1289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 1178 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2024-11-13 16:11:24,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 958 states. [2024-11-13 16:11:24,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 958 to 936. [2024-11-13 16:11:24,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 936 states, 728 states have (on average 1.1318681318681318) internal successors, (824), 750 states have internal predecessors, (824), 118 states have call successors, (118), 71 states have call predecessors, (118), 84 states have return successors, (162), 114 states have call predecessors, (162), 118 states have call successors, (162) [2024-11-13 16:11:24,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 936 states to 936 states and 1104 transitions. [2024-11-13 16:11:24,155 INFO L78 Accepts]: Start accepts. Automaton has 936 states and 1104 transitions. Word has length 91 [2024-11-13 16:11:24,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:11:24,155 INFO L471 AbstractCegarLoop]: Abstraction has 936 states and 1104 transitions. [2024-11-13 16:11:24,155 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 40 states have (on average 3.35) internal successors, (134), 37 states have internal predecessors, (134), 14 states have call successors, (22), 8 states have call predecessors, (22), 1 states have return successors, (14), 11 states have call predecessors, (14), 11 states have call successors, (14) [2024-11-13 16:11:24,155 INFO L276 IsEmpty]: Start isEmpty. Operand 936 states and 1104 transitions. [2024-11-13 16:11:24,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2024-11-13 16:11:24,157 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:11:24,159 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 5, 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] [2024-11-13 16:11:24,182 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2024-11-13 16:11:24,359 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-11-13 16:11:24,360 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting upsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-13 16:11:24,360 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:11:24,360 INFO L85 PathProgramCache]: Analyzing trace with hash -1547562227, now seen corresponding path program 2 times [2024-11-13 16:11:24,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:11:24,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829299205] [2024-11-13 16:11:24,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:11:24,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:11:24,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:11:26,416 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 16:11:26,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:11:26,418 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-11-13 16:11:26,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:11:26,521 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-11-13 16:11:26,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:11:26,523 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-11-13 16:11:26,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:11:26,525 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2024-11-13 16:11:26,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:11:26,917 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 9 proven. 205 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-13 16:11:26,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:11:26,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829299205] [2024-11-13 16:11:26,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829299205] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:11:26,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386609468] [2024-11-13 16:11:26,918 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 16:11:26,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:11:26,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:11:26,920 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:11:26,921 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-11-13 16:11:27,135 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 16:11:27,135 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 16:11:27,138 INFO L255 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-11-13 16:11:27,139 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:11:31,200 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 13 proven. 201 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-13 16:11:31,200 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:11:38,243 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 11 proven. 203 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-13 16:11:38,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386609468] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:11:38,244 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:11:38,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 27, 27] total 79 [2024-11-13 16:11:38,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223776082] [2024-11-13 16:11:38,244 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:11:38,245 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2024-11-13 16:11:38,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:11:38,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2024-11-13 16:11:38,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=568, Invalid=5594, Unknown=0, NotChecked=0, Total=6162 [2024-11-13 16:11:38,247 INFO L87 Difference]: Start difference. First operand 936 states and 1104 transitions. Second operand has 79 states, 69 states have (on average 2.6666666666666665) internal successors, (184), 69 states have internal predecessors, (184), 20 states have call successors, (21), 12 states have call predecessors, (21), 3 states have return successors, (11), 8 states have call predecessors, (11), 10 states have call successors, (11) [2024-11-13 16:11:58,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:11:58,454 INFO L93 Difference]: Finished difference Result 1089 states and 1277 transitions. [2024-11-13 16:11:58,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2024-11-13 16:11:58,455 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 69 states have (on average 2.6666666666666665) internal successors, (184), 69 states have internal predecessors, (184), 20 states have call successors, (21), 12 states have call predecessors, (21), 3 states have return successors, (11), 8 states have call predecessors, (11), 10 states have call successors, (11) Word has length 92 [2024-11-13 16:11:58,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:11:58,457 INFO L225 Difference]: With dead ends: 1089 [2024-11-13 16:11:58,458 INFO L226 Difference]: Without dead ends: 1053 [2024-11-13 16:11:58,459 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 144 SyntacticMatches, 1 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7391 ImplicationChecksByTransitivity, 20.2s TimeCoverageRelationStatistics Valid=1853, Invalid=20497, Unknown=0, NotChecked=0, Total=22350 [2024-11-13 16:11:58,459 INFO L432 NwaCegarLoop]: 73 mSDtfsCounter, 333 mSDsluCounter, 1893 mSDsCounter, 0 mSdLazyCounter, 4221 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 337 SdHoareTripleChecker+Valid, 1966 SdHoareTripleChecker+Invalid, 4322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 4221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.3s IncrementalHoareTripleChecker+Time [2024-11-13 16:11:58,459 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [337 Valid, 1966 Invalid, 4322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 4221 Invalid, 0 Unknown, 0 Unchecked, 10.3s Time] [2024-11-13 16:11:58,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1053 states. [2024-11-13 16:11:58,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1053 to 936. [2024-11-13 16:11:58,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 936 states, 728 states have (on average 1.1318681318681318) internal successors, (824), 750 states have internal predecessors, (824), 118 states have call successors, (118), 71 states have call predecessors, (118), 84 states have return successors, (162), 114 states have call predecessors, (162), 118 states have call successors, (162) [2024-11-13 16:11:58,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 936 states to 936 states and 1104 transitions. [2024-11-13 16:11:58,480 INFO L78 Accepts]: Start accepts. Automaton has 936 states and 1104 transitions. Word has length 92 [2024-11-13 16:11:58,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:11:58,481 INFO L471 AbstractCegarLoop]: Abstraction has 936 states and 1104 transitions. [2024-11-13 16:11:58,481 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 69 states have (on average 2.6666666666666665) internal successors, (184), 69 states have internal predecessors, (184), 20 states have call successors, (21), 12 states have call predecessors, (21), 3 states have return successors, (11), 8 states have call predecessors, (11), 10 states have call successors, (11) [2024-11-13 16:11:58,481 INFO L276 IsEmpty]: Start isEmpty. Operand 936 states and 1104 transitions. [2024-11-13 16:11:58,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2024-11-13 16:11:58,482 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:11:58,482 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 6, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:11:58,504 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2024-11-13 16:11:58,682 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2024-11-13 16:11:58,683 INFO L396 AbstractCegarLoop]: === Iteration 42 === Targeting upsweepErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-13 16:11:58,684 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:11:58,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1629462045, now seen corresponding path program 1 times [2024-11-13 16:11:58,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:11:58,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611305442] [2024-11-13 16:11:58,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:11:58,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:11:58,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:12:00,828 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 16:12:00,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:12:00,829 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-11-13 16:12:00,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:12:00,911 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-11-13 16:12:00,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:12:00,913 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-11-13 16:12:00,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:12:00,928 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-11-13 16:12:00,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:12:01,711 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 16:12:01,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:12:02,090 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-11-13 16:12:02,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:12:02,098 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 61 proven. 85 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-13 16:12:02,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:12:02,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611305442] [2024-11-13 16:12:02,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611305442] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:12:02,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262139525] [2024-11-13 16:12:02,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:12:02,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:12:02,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:12:02,103 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:12:02,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-11-13 16:12:02,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:12:02,326 INFO L255 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-13 16:12:02,329 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:12:04,427 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-11-13 16:12:04,427 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:12:08,393 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 39 proven. 100 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-13 16:12:08,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262139525] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:12:08,393 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:12:08,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 13, 19] total 60 [2024-11-13 16:12:08,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760474358] [2024-11-13 16:12:08,394 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:12:08,394 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2024-11-13 16:12:08,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:12:08,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2024-11-13 16:12:08,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=3256, Unknown=0, NotChecked=0, Total=3540 [2024-11-13 16:12:08,395 INFO L87 Difference]: Start difference. First operand 936 states and 1104 transitions. Second operand has 60 states, 54 states have (on average 3.185185185185185) internal successors, (172), 54 states have internal predecessors, (172), 15 states have call successors, (23), 7 states have call predecessors, (23), 5 states have return successors, (18), 9 states have call predecessors, (18), 11 states have call successors, (18) [2024-11-13 16:12:33,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:12:33,894 INFO L93 Difference]: Finished difference Result 935 states and 1081 transitions. [2024-11-13 16:12:33,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2024-11-13 16:12:33,894 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 54 states have (on average 3.185185185185185) internal successors, (172), 54 states have internal predecessors, (172), 15 states have call successors, (23), 7 states have call predecessors, (23), 5 states have return successors, (18), 9 states have call predecessors, (18), 11 states have call successors, (18) Word has length 97 [2024-11-13 16:12:33,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:12:33,898 INFO L225 Difference]: With dead ends: 935 [2024-11-13 16:12:33,898 INFO L226 Difference]: Without dead ends: 935 [2024-11-13 16:12:33,899 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5449 ImplicationChecksByTransitivity, 19.8s TimeCoverageRelationStatistics Valid=1599, Invalid=18141, Unknown=0, NotChecked=0, Total=19740 [2024-11-13 16:12:33,900 INFO L432 NwaCegarLoop]: 79 mSDtfsCounter, 212 mSDsluCounter, 2310 mSDsCounter, 0 mSdLazyCounter, 4773 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 2389 SdHoareTripleChecker+Invalid, 4865 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 4773 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.3s IncrementalHoareTripleChecker+Time [2024-11-13 16:12:33,900 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [212 Valid, 2389 Invalid, 4865 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [92 Valid, 4773 Invalid, 0 Unknown, 0 Unchecked, 12.3s Time] [2024-11-13 16:12:33,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 935 states. [2024-11-13 16:12:33,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 935 to 891. [2024-11-13 16:12:33,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 891 states, 693 states have (on average 1.1183261183261184) internal successors, (775), 713 states have internal predecessors, (775), 113 states have call successors, (113), 67 states have call predecessors, (113), 79 states have return successors, (150), 110 states have call predecessors, (150), 113 states have call successors, (150) [2024-11-13 16:12:33,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 891 states to 891 states and 1038 transitions. [2024-11-13 16:12:33,925 INFO L78 Accepts]: Start accepts. Automaton has 891 states and 1038 transitions. Word has length 97 [2024-11-13 16:12:33,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:12:33,925 INFO L471 AbstractCegarLoop]: Abstraction has 891 states and 1038 transitions. [2024-11-13 16:12:33,925 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 54 states have (on average 3.185185185185185) internal successors, (172), 54 states have internal predecessors, (172), 15 states have call successors, (23), 7 states have call predecessors, (23), 5 states have return successors, (18), 9 states have call predecessors, (18), 11 states have call successors, (18) [2024-11-13 16:12:33,925 INFO L276 IsEmpty]: Start isEmpty. Operand 891 states and 1038 transitions. [2024-11-13 16:12:33,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2024-11-13 16:12:33,926 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:12:33,926 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 7, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:12:33,947 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2024-11-13 16:12:34,127 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2024-11-13 16:12:34,127 INFO L396 AbstractCegarLoop]: === Iteration 43 === Targeting upsweepErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-13 16:12:34,128 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:12:34,128 INFO L85 PathProgramCache]: Analyzing trace with hash 84359157, now seen corresponding path program 2 times [2024-11-13 16:12:34,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:12:34,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143108306] [2024-11-13 16:12:34,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:12:34,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:12:34,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:12:36,662 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 16:12:36,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:12:36,664 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-11-13 16:12:36,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:12:36,769 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-11-13 16:12:36,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:12:36,772 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-11-13 16:12:36,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:12:36,775 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2024-11-13 16:12:36,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:12:37,804 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 16:12:37,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:12:38,226 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-11-13 16:12:38,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:12:38,234 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 83 proven. 107 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-13 16:12:38,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:12:38,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143108306] [2024-11-13 16:12:38,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143108306] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:12:38,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360812172] [2024-11-13 16:12:38,235 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 16:12:38,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:12:38,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:12:38,237 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:12:38,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-11-13 16:12:38,469 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 16:12:38,469 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 16:12:38,472 INFO L255 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 54 conjuncts are in the unsatisfiable core [2024-11-13 16:12:38,475 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:12:43,713 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 39 proven. 151 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-13 16:12:43,713 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:12:51,636 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 38 proven. 152 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-13 16:12:51,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360812172] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:12:51,637 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:12:51,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 28, 28] total 85 [2024-11-13 16:12:51,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880399432] [2024-11-13 16:12:51,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:12:51,637 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2024-11-13 16:12:51,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:12:51,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2024-11-13 16:12:51,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=479, Invalid=6661, Unknown=0, NotChecked=0, Total=7140 [2024-11-13 16:12:51,639 INFO L87 Difference]: Start difference. First operand 891 states and 1038 transitions. Second operand has 85 states, 72 states have (on average 2.7083333333333335) internal successors, (195), 72 states have internal predecessors, (195), 27 states have call successors, (28), 12 states have call predecessors, (28), 6 states have return successors, (17), 13 states have call predecessors, (17), 16 states have call successors, (17) [2024-11-13 16:13:31,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:13:31,336 INFO L93 Difference]: Finished difference Result 1433 states and 1637 transitions. [2024-11-13 16:13:31,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 169 states. [2024-11-13 16:13:31,336 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 72 states have (on average 2.7083333333333335) internal successors, (195), 72 states have internal predecessors, (195), 27 states have call successors, (28), 12 states have call predecessors, (28), 6 states have return successors, (17), 13 states have call predecessors, (17), 16 states have call successors, (17) Word has length 104 [2024-11-13 16:13:31,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:13:31,341 INFO L225 Difference]: With dead ends: 1433 [2024-11-13 16:13:31,341 INFO L226 Difference]: Without dead ends: 1361 [2024-11-13 16:13:31,345 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 173 SyntacticMatches, 2 SemanticMatches, 242 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19948 ImplicationChecksByTransitivity, 39.6s TimeCoverageRelationStatistics Valid=4517, Invalid=54775, Unknown=0, NotChecked=0, Total=59292 [2024-11-13 16:13:31,346 INFO L432 NwaCegarLoop]: 96 mSDtfsCounter, 544 mSDsluCounter, 2354 mSDsCounter, 0 mSdLazyCounter, 5483 mSolverCounterSat, 430 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 546 SdHoareTripleChecker+Valid, 2450 SdHoareTripleChecker+Invalid, 5913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 430 IncrementalHoareTripleChecker+Valid, 5483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.9s IncrementalHoareTripleChecker+Time [2024-11-13 16:13:31,346 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [546 Valid, 2450 Invalid, 5913 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [430 Valid, 5483 Invalid, 0 Unknown, 0 Unchecked, 12.9s Time] [2024-11-13 16:13:31,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1361 states. [2024-11-13 16:13:31,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1361 to 1206. [2024-11-13 16:13:31,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1206 states, 938 states have (on average 1.0778251599147122) internal successors, (1011), 960 states have internal predecessors, (1011), 148 states have call successors, (148), 89 states have call predecessors, (148), 114 states have return successors, (225), 156 states have call predecessors, (225), 148 states have call successors, (225) [2024-11-13 16:13:31,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1206 states to 1206 states and 1384 transitions. [2024-11-13 16:13:31,373 INFO L78 Accepts]: Start accepts. Automaton has 1206 states and 1384 transitions. Word has length 104 [2024-11-13 16:13:31,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:13:31,373 INFO L471 AbstractCegarLoop]: Abstraction has 1206 states and 1384 transitions. [2024-11-13 16:13:31,373 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 72 states have (on average 2.7083333333333335) internal successors, (195), 72 states have internal predecessors, (195), 27 states have call successors, (28), 12 states have call predecessors, (28), 6 states have return successors, (17), 13 states have call predecessors, (17), 16 states have call successors, (17) [2024-11-13 16:13:31,373 INFO L276 IsEmpty]: Start isEmpty. Operand 1206 states and 1384 transitions. [2024-11-13 16:13:31,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2024-11-13 16:13:31,374 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:13:31,374 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 7, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:13:31,394 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2024-11-13 16:13:31,575 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2024-11-13 16:13:31,575 INFO L396 AbstractCegarLoop]: === Iteration 44 === Targeting upsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-13 16:13:31,575 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:13:31,575 INFO L85 PathProgramCache]: Analyzing trace with hash 1279184817, now seen corresponding path program 1 times [2024-11-13 16:13:31,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:13:31,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789637940] [2024-11-13 16:13:31,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:13:31,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:13:31,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:13:33,818 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 16:13:33,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:13:33,820 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-11-13 16:13:33,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:13:33,900 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-11-13 16:13:33,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:13:33,902 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-11-13 16:13:33,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:13:33,904 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2024-11-13 16:13:33,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:13:34,354 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 16:13:34,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:13:34,361 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-11-13 16:13:34,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:13:34,367 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2024-11-13 16:13:34,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:13:34,757 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 98 proven. 96 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-13 16:13:34,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:13:34,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789637940] [2024-11-13 16:13:34,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789637940] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:13:34,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568864951] [2024-11-13 16:13:34,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:13:34,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:13:34,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:13:34,759 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:13:34,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-11-13 16:13:35,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:13:35,021 INFO L255 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 94 conjuncts are in the unsatisfiable core [2024-11-13 16:13:35,025 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:13:41,030 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 33 proven. 174 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-13 16:13:41,030 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:13:49,834 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 203 treesize of output 197 [2024-11-13 16:13:49,897 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 46 proven. 51 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2024-11-13 16:13:49,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568864951] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:13:49,898 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:13:49,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 30, 18] total 76 [2024-11-13 16:13:49,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168749588] [2024-11-13 16:13:49,898 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:13:49,898 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2024-11-13 16:13:49,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:13:49,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2024-11-13 16:13:49,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=318, Invalid=5534, Unknown=0, NotChecked=0, Total=5852 [2024-11-13 16:13:49,900 INFO L87 Difference]: Start difference. First operand 1206 states and 1384 transitions. Second operand has 77 states, 62 states have (on average 2.774193548387097) internal successors, (172), 63 states have internal predecessors, (172), 21 states have call successors, (29), 12 states have call predecessors, (29), 6 states have return successors, (20), 12 states have call predecessors, (20), 14 states have call successors, (20) [2024-11-13 16:14:41,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:14:41,083 INFO L93 Difference]: Finished difference Result 1922 states and 2249 transitions. [2024-11-13 16:14:41,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2024-11-13 16:14:41,084 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 62 states have (on average 2.774193548387097) internal successors, (172), 63 states have internal predecessors, (172), 21 states have call successors, (29), 12 states have call predecessors, (29), 6 states have return successors, (20), 12 states have call predecessors, (20), 14 states have call successors, (20) Word has length 109 [2024-11-13 16:14:41,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:14:41,089 INFO L225 Difference]: With dead ends: 1922 [2024-11-13 16:14:41,089 INFO L226 Difference]: Without dead ends: 1922 [2024-11-13 16:14:41,092 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 195 SyntacticMatches, 3 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15526 ImplicationChecksByTransitivity, 47.3s TimeCoverageRelationStatistics Valid=4295, Invalid=41715, Unknown=0, NotChecked=0, Total=46010 [2024-11-13 16:14:41,092 INFO L432 NwaCegarLoop]: 96 mSDtfsCounter, 426 mSDsluCounter, 2683 mSDsCounter, 0 mSdLazyCounter, 5615 mSolverCounterSat, 426 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 426 SdHoareTripleChecker+Valid, 2779 SdHoareTripleChecker+Invalid, 6041 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 426 IncrementalHoareTripleChecker+Valid, 5615 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.7s IncrementalHoareTripleChecker+Time [2024-11-13 16:14:41,093 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [426 Valid, 2779 Invalid, 6041 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [426 Valid, 5615 Invalid, 0 Unknown, 0 Unchecked, 15.7s Time] [2024-11-13 16:14:41,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1922 states. [2024-11-13 16:14:41,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1922 to 1574. [2024-11-13 16:14:41,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1574 states, 1210 states have (on average 1.071900826446281) internal successors, (1297), 1238 states have internal predecessors, (1297), 207 states have call successors, (207), 121 states have call predecessors, (207), 151 states have return successors, (345), 214 states have call predecessors, (345), 207 states have call successors, (345) [2024-11-13 16:14:41,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1574 states to 1574 states and 1849 transitions. [2024-11-13 16:14:41,128 INFO L78 Accepts]: Start accepts. Automaton has 1574 states and 1849 transitions. Word has length 109 [2024-11-13 16:14:41,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:14:41,129 INFO L471 AbstractCegarLoop]: Abstraction has 1574 states and 1849 transitions. [2024-11-13 16:14:41,129 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 62 states have (on average 2.774193548387097) internal successors, (172), 63 states have internal predecessors, (172), 21 states have call successors, (29), 12 states have call predecessors, (29), 6 states have return successors, (20), 12 states have call predecessors, (20), 14 states have call successors, (20) [2024-11-13 16:14:41,129 INFO L276 IsEmpty]: Start isEmpty. Operand 1574 states and 1849 transitions. [2024-11-13 16:14:41,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2024-11-13 16:14:41,130 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:14:41,130 INFO L215 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 5, 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] [2024-11-13 16:14:41,151 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2024-11-13 16:14:41,331 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2024-11-13 16:14:41,331 INFO L396 AbstractCegarLoop]: === Iteration 45 === Targeting upsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-13 16:14:41,331 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:14:41,331 INFO L85 PathProgramCache]: Analyzing trace with hash 1087992573, now seen corresponding path program 3 times [2024-11-13 16:14:41,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:14:41,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863223968] [2024-11-13 16:14:41,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:14:41,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:14:41,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:14:43,980 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 16:14:43,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:14:43,981 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-11-13 16:14:43,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:14:44,072 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-11-13 16:14:44,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:14:44,074 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-11-13 16:14:44,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:14:44,076 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2024-11-13 16:14:44,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:14:44,420 INFO L134 CoverageAnalysis]: Checked inductivity of 412 backedges. 9 proven. 393 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-13 16:14:44,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:14:44,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863223968] [2024-11-13 16:14:44,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863223968] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:14:44,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481331465] [2024-11-13 16:14:44,421 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 16:14:44,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:14:44,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:14:44,425 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:14:44,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-11-13 16:14:44,688 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-13 16:14:44,689 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 16:14:44,691 INFO L255 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 64 conjuncts are in the unsatisfiable core [2024-11-13 16:14:44,693 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:14:55,024 INFO L134 CoverageAnalysis]: Checked inductivity of 412 backedges. 42 proven. 35 refuted. 0 times theorem prover too weak. 335 trivial. 0 not checked. [2024-11-13 16:14:55,024 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:15:11,380 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 194 treesize of output 176 [2024-11-13 16:15:11,441 INFO L134 CoverageAnalysis]: Checked inductivity of 412 backedges. 47 proven. 17 refuted. 0 times theorem prover too weak. 348 trivial. 0 not checked. [2024-11-13 16:15:11,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481331465] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:15:11,441 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:15:11,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 20, 18] total 68 [2024-11-13 16:15:11,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463670954] [2024-11-13 16:15:11,441 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:15:11,442 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2024-11-13 16:15:11,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:15:11,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2024-11-13 16:15:11,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=4251, Unknown=0, NotChecked=0, Total=4556 [2024-11-13 16:15:11,443 INFO L87 Difference]: Start difference. First operand 1574 states and 1849 transitions. Second operand has 68 states, 54 states have (on average 2.5185185185185186) internal successors, (136), 54 states have internal predecessors, (136), 18 states have call successors, (21), 14 states have call predecessors, (21), 2 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2024-11-13 16:16:30,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:16:30,318 INFO L93 Difference]: Finished difference Result 1999 states and 2339 transitions. [2024-11-13 16:16:30,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 152 states. [2024-11-13 16:16:30,319 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 54 states have (on average 2.5185185185185186) internal successors, (136), 54 states have internal predecessors, (136), 18 states have call successors, (21), 14 states have call predecessors, (21), 2 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) Word has length 108 [2024-11-13 16:16:30,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:16:30,327 INFO L225 Difference]: With dead ends: 1999 [2024-11-13 16:16:30,327 INFO L226 Difference]: Without dead ends: 1998 [2024-11-13 16:16:30,331 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 400 GetRequests, 192 SyntacticMatches, 1 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14330 ImplicationChecksByTransitivity, 70.5s TimeCoverageRelationStatistics Valid=3716, Invalid=39756, Unknown=0, NotChecked=0, Total=43472 [2024-11-13 16:16:30,331 INFO L432 NwaCegarLoop]: 85 mSDtfsCounter, 418 mSDsluCounter, 1781 mSDsCounter, 0 mSdLazyCounter, 5705 mSolverCounterSat, 222 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 419 SdHoareTripleChecker+Valid, 1866 SdHoareTripleChecker+Invalid, 5927 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 222 IncrementalHoareTripleChecker+Valid, 5705 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.0s IncrementalHoareTripleChecker+Time [2024-11-13 16:16:30,332 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [419 Valid, 1866 Invalid, 5927 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [222 Valid, 5705 Invalid, 0 Unknown, 0 Unchecked, 20.0s Time] [2024-11-13 16:16:30,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1998 states. [2024-11-13 16:16:30,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1998 to 1952. [2024-11-13 16:16:30,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1952 states, 1497 states have (on average 1.0721442885771544) internal successors, (1605), 1531 states have internal predecessors, (1605), 257 states have call successors, (257), 149 states have call predecessors, (257), 192 states have return successors, (433), 271 states have call predecessors, (433), 257 states have call successors, (433) [2024-11-13 16:16:30,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1952 states to 1952 states and 2295 transitions. [2024-11-13 16:16:30,384 INFO L78 Accepts]: Start accepts. Automaton has 1952 states and 2295 transitions. Word has length 108 [2024-11-13 16:16:30,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:16:30,386 INFO L471 AbstractCegarLoop]: Abstraction has 1952 states and 2295 transitions. [2024-11-13 16:16:30,386 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 54 states have (on average 2.5185185185185186) internal successors, (136), 54 states have internal predecessors, (136), 18 states have call successors, (21), 14 states have call predecessors, (21), 2 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2024-11-13 16:16:30,386 INFO L276 IsEmpty]: Start isEmpty. Operand 1952 states and 2295 transitions. [2024-11-13 16:16:30,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2024-11-13 16:16:30,387 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:16:30,388 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:16:30,411 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2024-11-13 16:16:30,588 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:16:30,588 INFO L396 AbstractCegarLoop]: === Iteration 46 === Targeting downsweepErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-13 16:16:30,588 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:16:30,589 INFO L85 PathProgramCache]: Analyzing trace with hash -6151952, now seen corresponding path program 2 times [2024-11-13 16:16:30,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:16:30,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621863166] [2024-11-13 16:16:30,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:16:30,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:16:30,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:16:31,323 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 16:16:31,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:16:31,324 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-11-13 16:16:31,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:16:31,369 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-11-13 16:16:31,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:16:31,372 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-11-13 16:16:31,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:16:31,374 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-11-13 16:16:31,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:16:31,386 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 16:16:31,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:16:31,389 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-11-13 16:16:31,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:16:31,391 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 35 proven. 32 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-13 16:16:31,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:16:31,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621863166] [2024-11-13 16:16:31,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621863166] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:16:31,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336520030] [2024-11-13 16:16:31,392 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 16:16:31,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:16:31,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:16:31,394 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:16:31,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-11-13 16:16:31,665 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 16:16:31,665 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 16:16:31,668 INFO L255 TraceCheckSpWp]: Trace formula consists of 542 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-13 16:16:31,669 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:16:32,951 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 35 proven. 32 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-13 16:16:32,951 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:16:34,431 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 35 proven. 32 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-13 16:16:34,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336520030] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:16:34,431 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:16:34,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 45 [2024-11-13 16:16:34,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512936801] [2024-11-13 16:16:34,432 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:16:34,432 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-11-13 16:16:34,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:16:34,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-11-13 16:16:34,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=1750, Unknown=0, NotChecked=0, Total=1980 [2024-11-13 16:16:34,433 INFO L87 Difference]: Start difference. First operand 1952 states and 2295 transitions. Second operand has 45 states, 42 states have (on average 3.5714285714285716) internal successors, (150), 38 states have internal predecessors, (150), 14 states have call successors, (22), 9 states have call predecessors, (22), 1 states have return successors, (13), 10 states have call predecessors, (13), 10 states have call successors, (13) [2024-11-13 16:16:37,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:16:37,276 INFO L93 Difference]: Finished difference Result 2061 states and 2409 transitions. [2024-11-13 16:16:37,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-13 16:16:37,277 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 42 states have (on average 3.5714285714285716) internal successors, (150), 38 states have internal predecessors, (150), 14 states have call successors, (22), 9 states have call predecessors, (22), 1 states have return successors, (13), 10 states have call predecessors, (13), 10 states have call successors, (13) Word has length 111 [2024-11-13 16:16:37,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:16:37,286 INFO L225 Difference]: With dead ends: 2061 [2024-11-13 16:16:37,286 INFO L226 Difference]: Without dead ends: 2061 [2024-11-13 16:16:37,287 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1026 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=338, Invalid=2418, Unknown=0, NotChecked=0, Total=2756 [2024-11-13 16:16:37,287 INFO L432 NwaCegarLoop]: 53 mSDtfsCounter, 116 mSDsluCounter, 1153 mSDsCounter, 0 mSdLazyCounter, 949 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 1206 SdHoareTripleChecker+Invalid, 969 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 949 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2024-11-13 16:16:37,288 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 1206 Invalid, 969 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 949 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2024-11-13 16:16:37,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2061 states. [2024-11-13 16:16:37,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2061 to 2044. [2024-11-13 16:16:37,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2044 states, 1572 states have (on average 1.071882951653944) internal successors, (1685), 1607 states have internal predecessors, (1685), 267 states have call successors, (267), 156 states have call predecessors, (267), 199 states have return successors, (443), 280 states have call predecessors, (443), 267 states have call successors, (443) [2024-11-13 16:16:37,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2044 states to 2044 states and 2395 transitions. [2024-11-13 16:16:37,336 INFO L78 Accepts]: Start accepts. Automaton has 2044 states and 2395 transitions. Word has length 111 [2024-11-13 16:16:37,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:16:37,337 INFO L471 AbstractCegarLoop]: Abstraction has 2044 states and 2395 transitions. [2024-11-13 16:16:37,337 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 42 states have (on average 3.5714285714285716) internal successors, (150), 38 states have internal predecessors, (150), 14 states have call successors, (22), 9 states have call predecessors, (22), 1 states have return successors, (13), 10 states have call predecessors, (13), 10 states have call successors, (13) [2024-11-13 16:16:37,337 INFO L276 IsEmpty]: Start isEmpty. Operand 2044 states and 2395 transitions. [2024-11-13 16:16:37,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2024-11-13 16:16:37,338 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:16:37,338 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:16:37,362 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2024-11-13 16:16:37,539 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:16:37,539 INFO L396 AbstractCegarLoop]: === Iteration 47 === Targeting downsweepErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-13 16:16:37,539 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:16:37,539 INFO L85 PathProgramCache]: Analyzing trace with hash -550272396, now seen corresponding path program 3 times [2024-11-13 16:16:37,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:16:37,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650903707] [2024-11-13 16:16:37,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:16:37,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:16:37,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:16:38,472 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 16:16:38,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:16:38,474 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-11-13 16:16:38,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:16:38,527 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-11-13 16:16:38,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:16:38,530 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-11-13 16:16:38,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:16:38,532 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-11-13 16:16:38,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:16:38,545 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 16:16:38,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:16:38,548 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-11-13 16:16:38,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:16:38,550 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 34 proven. 56 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-11-13 16:16:38,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:16:38,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650903707] [2024-11-13 16:16:38,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650903707] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:16:38,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089689690] [2024-11-13 16:16:38,551 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 16:16:38,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:16:38,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:16:38,553 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:16:38,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-11-13 16:16:39,003 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-13 16:16:39,003 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 16:16:39,007 INFO L255 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-11-13 16:16:39,010 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:16:41,128 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 43 proven. 16 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2024-11-13 16:16:41,128 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:16:45,226 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 58 proven. 8 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2024-11-13 16:16:45,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089689690] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:16:45,226 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:16:45,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 15, 19] total 49 [2024-11-13 16:16:45,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001839923] [2024-11-13 16:16:45,226 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:16:45,227 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-11-13 16:16:45,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:16:45,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-11-13 16:16:45,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=2154, Unknown=0, NotChecked=0, Total=2352 [2024-11-13 16:16:45,228 INFO L87 Difference]: Start difference. First operand 2044 states and 2395 transitions. Second operand has 49 states, 40 states have (on average 4.25) internal successors, (170), 38 states have internal predecessors, (170), 17 states have call successors, (27), 12 states have call predecessors, (27), 4 states have return successors, (17), 12 states have call predecessors, (17), 8 states have call successors, (17) [2024-11-13 16:16:55,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:16:55,376 INFO L93 Difference]: Finished difference Result 2476 states and 2871 transitions. [2024-11-13 16:16:55,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2024-11-13 16:16:55,377 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 40 states have (on average 4.25) internal successors, (170), 38 states have internal predecessors, (170), 17 states have call successors, (27), 12 states have call predecessors, (27), 4 states have return successors, (17), 12 states have call predecessors, (17), 8 states have call successors, (17) Word has length 115 [2024-11-13 16:16:55,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:16:55,390 INFO L225 Difference]: With dead ends: 2476 [2024-11-13 16:16:55,390 INFO L226 Difference]: Without dead ends: 2464 [2024-11-13 16:16:55,392 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 215 SyntacticMatches, 1 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2726 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=934, Invalid=9368, Unknown=0, NotChecked=0, Total=10302 [2024-11-13 16:16:55,393 INFO L432 NwaCegarLoop]: 48 mSDtfsCounter, 288 mSDsluCounter, 804 mSDsCounter, 0 mSdLazyCounter, 1217 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 852 SdHoareTripleChecker+Invalid, 1320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 1217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2024-11-13 16:16:55,393 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [291 Valid, 852 Invalid, 1320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 1217 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2024-11-13 16:16:55,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2464 states. [2024-11-13 16:16:55,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2464 to 2045. [2024-11-13 16:16:55,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2045 states, 1574 states have (on average 1.0692503176620076) internal successors, (1683), 1608 states have internal predecessors, (1683), 265 states have call successors, (265), 155 states have call predecessors, (265), 200 states have return successors, (443), 281 states have call predecessors, (443), 265 states have call successors, (443) [2024-11-13 16:16:55,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2045 states to 2045 states and 2391 transitions. [2024-11-13 16:16:55,438 INFO L78 Accepts]: Start accepts. Automaton has 2045 states and 2391 transitions. Word has length 115 [2024-11-13 16:16:55,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:16:55,438 INFO L471 AbstractCegarLoop]: Abstraction has 2045 states and 2391 transitions. [2024-11-13 16:16:55,438 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 40 states have (on average 4.25) internal successors, (170), 38 states have internal predecessors, (170), 17 states have call successors, (27), 12 states have call predecessors, (27), 4 states have return successors, (17), 12 states have call predecessors, (17), 8 states have call successors, (17) [2024-11-13 16:16:55,438 INFO L276 IsEmpty]: Start isEmpty. Operand 2045 states and 2391 transitions. [2024-11-13 16:16:55,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2024-11-13 16:16:55,440 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:16:55,440 INFO L215 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 6, 5, 5, 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] [2024-11-13 16:16:55,462 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2024-11-13 16:16:55,640 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:16:55,641 INFO L396 AbstractCegarLoop]: === Iteration 48 === Targeting upsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-13 16:16:55,641 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:16:55,641 INFO L85 PathProgramCache]: Analyzing trace with hash -1380938864, now seen corresponding path program 6 times [2024-11-13 16:16:55,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:16:55,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540373695] [2024-11-13 16:16:55,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:16:55,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:16:55,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:16:57,625 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 16:16:57,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:16:57,626 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-11-13 16:16:57,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:16:57,711 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-11-13 16:16:57,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:16:57,713 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-11-13 16:16:57,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:16:57,715 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 37 proven. 496 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-13 16:16:57,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:16:57,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540373695] [2024-11-13 16:16:57,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540373695] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:16:57,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305174218] [2024-11-13 16:16:57,716 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-13 16:16:57,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:16:57,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:16:57,718 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:16:57,721 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-11-13 16:16:58,126 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2024-11-13 16:16:58,126 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 16:16:58,130 INFO L255 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-11-13 16:16:58,132 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:17:00,023 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-13 16:17:06,827 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2024-11-13 16:17:07,380 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 198 proven. 158 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2024-11-13 16:17:07,380 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:17:12,241 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 267 proven. 86 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2024-11-13 16:17:12,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305174218] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:17:12,241 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:17:12,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 22, 21] total 70 [2024-11-13 16:17:12,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009907875] [2024-11-13 16:17:12,242 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:17:12,242 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2024-11-13 16:17:12,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:17:12,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2024-11-13 16:17:12,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=507, Invalid=4323, Unknown=0, NotChecked=0, Total=4830 [2024-11-13 16:17:12,244 INFO L87 Difference]: Start difference. First operand 2045 states and 2391 transitions. Second operand has 70 states, 64 states have (on average 2.65625) internal successors, (170), 65 states have internal predecessors, (170), 12 states have call successors, (16), 8 states have call predecessors, (16), 3 states have return successors, (10), 5 states have call predecessors, (10), 7 states have call successors, (10) [2024-11-13 16:17:28,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:17:28,874 INFO L93 Difference]: Finished difference Result 2182 states and 2523 transitions. [2024-11-13 16:17:28,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2024-11-13 16:17:28,875 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 64 states have (on average 2.65625) internal successors, (170), 65 states have internal predecessors, (170), 12 states have call successors, (16), 8 states have call predecessors, (16), 3 states have return successors, (10), 5 states have call predecessors, (10), 7 states have call successors, (10) Word has length 113 [2024-11-13 16:17:28,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:17:28,885 INFO L225 Difference]: With dead ends: 2182 [2024-11-13 16:17:28,885 INFO L226 Difference]: Without dead ends: 2180 [2024-11-13 16:17:28,887 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 195 SyntacticMatches, 1 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5105 ImplicationChecksByTransitivity, 21.7s TimeCoverageRelationStatistics Valid=1771, Invalid=17135, Unknown=0, NotChecked=0, Total=18906 [2024-11-13 16:17:28,888 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 323 mSDsluCounter, 721 mSDsCounter, 0 mSdLazyCounter, 1704 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 756 SdHoareTripleChecker+Invalid, 1860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 1704 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2024-11-13 16:17:28,888 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [327 Valid, 756 Invalid, 1860 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 1704 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2024-11-13 16:17:28,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2180 states. [2024-11-13 16:17:28,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2180 to 2038. [2024-11-13 16:17:28,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2038 states, 1571 states have (on average 1.0649267982176958) internal successors, (1673), 1604 states have internal predecessors, (1673), 265 states have call successors, (265), 153 states have call predecessors, (265), 196 states have return successors, (438), 280 states have call predecessors, (438), 265 states have call successors, (438) [2024-11-13 16:17:28,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2038 states to 2038 states and 2376 transitions. [2024-11-13 16:17:28,966 INFO L78 Accepts]: Start accepts. Automaton has 2038 states and 2376 transitions. Word has length 113 [2024-11-13 16:17:28,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:17:28,966 INFO L471 AbstractCegarLoop]: Abstraction has 2038 states and 2376 transitions. [2024-11-13 16:17:28,966 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 64 states have (on average 2.65625) internal successors, (170), 65 states have internal predecessors, (170), 12 states have call successors, (16), 8 states have call predecessors, (16), 3 states have return successors, (10), 5 states have call predecessors, (10), 7 states have call successors, (10) [2024-11-13 16:17:28,966 INFO L276 IsEmpty]: Start isEmpty. Operand 2038 states and 2376 transitions. [2024-11-13 16:17:28,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2024-11-13 16:17:28,969 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:17:28,969 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:17:28,993 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2024-11-13 16:17:29,169 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c248d061-6f15-444d-91f6-16fb11eb4d54/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2024-11-13 16:17:29,170 INFO L396 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-13 16:17:29,171 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:17:29,171 INFO L85 PathProgramCache]: Analyzing trace with hash -1331962817, now seen corresponding path program 1 times [2024-11-13 16:17:29,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:17:29,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753919362] [2024-11-13 16:17:29,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:17:29,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:17:29,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat