./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2018/Problem13.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 826ab2ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67fccf6f-2cdd-4805-aa03-8a37a527ffa3/bin/uautomizer-verify-qhAvR1uOyd/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67fccf6f-2cdd-4805-aa03-8a37a527ffa3/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_67fccf6f-2cdd-4805-aa03-8a37a527ffa3/bin/uautomizer-verify-qhAvR1uOyd/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67fccf6f-2cdd-4805-aa03-8a37a527ffa3/bin/uautomizer-verify-qhAvR1uOyd/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2018/Problem13.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67fccf6f-2cdd-4805-aa03-8a37a527ffa3/bin/uautomizer-verify-qhAvR1uOyd/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67fccf6f-2cdd-4805-aa03-8a37a527ffa3/bin/uautomizer-verify-qhAvR1uOyd --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 39257b2f2790dc593eb015569e826a332fcc3e3cd918d00daa305f748c1b3d75 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-13 15:28:04,882 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-13 15:28:04,970 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67fccf6f-2cdd-4805-aa03-8a37a527ffa3/bin/uautomizer-verify-qhAvR1uOyd/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-13 15:28:04,975 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-13 15:28:04,976 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-13 15:28:04,999 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-13 15:28:04,999 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-13 15:28:05,000 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-13 15:28:05,000 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-13 15:28:05,000 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-13 15:28:05,000 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-13 15:28:05,001 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-13 15:28:05,001 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-13 15:28:05,001 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-13 15:28:05,001 INFO L153 SettingsManager]: * Use SBE=true [2024-11-13 15:28:05,001 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-13 15:28:05,002 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-13 15:28:05,002 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-13 15:28:05,002 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-13 15:28:05,002 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-13 15:28:05,002 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-13 15:28:05,002 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-13 15:28:05,003 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-13 15:28:05,003 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-13 15:28:05,003 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-13 15:28:05,003 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-13 15:28:05,003 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-13 15:28:05,003 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-13 15:28:05,003 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-13 15:28:05,004 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-13 15:28:05,004 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-13 15:28:05,004 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-13 15:28:05,004 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-13 15:28:05,004 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-13 15:28:05,004 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-13 15:28:05,004 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-13 15:28:05,005 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-13 15:28:05,005 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-13 15:28:05,005 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-13 15:28:05,005 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-13 15:28:05,005 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-13 15:28:05,005 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-13 15:28:05,005 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_67fccf6f-2cdd-4805-aa03-8a37a527ffa3/bin/uautomizer-verify-qhAvR1uOyd Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 39257b2f2790dc593eb015569e826a332fcc3e3cd918d00daa305f748c1b3d75 [2024-11-13 15:28:05,270 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-13 15:28:05,279 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-13 15:28:05,281 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-13 15:28:05,283 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-13 15:28:05,283 INFO L274 PluginConnector]: CDTParser initialized [2024-11-13 15:28:05,284 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67fccf6f-2cdd-4805-aa03-8a37a527ffa3/bin/uautomizer-verify-qhAvR1uOyd/../../sv-benchmarks/c/eca-rers2018/Problem13.c Unable to find full path for "g++" [2024-11-13 15:28:07,180 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-13 15:28:08,715 INFO L384 CDTParser]: Found 1 translation units. [2024-11-13 15:28:08,716 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67fccf6f-2cdd-4805-aa03-8a37a527ffa3/sv-benchmarks/c/eca-rers2018/Problem13.c [2024-11-13 15:28:08,879 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67fccf6f-2cdd-4805-aa03-8a37a527ffa3/bin/uautomizer-verify-qhAvR1uOyd/data/6c17fe565/83f0ec8cac924ad7853ade4d4a28f25b/FLAGda7bff6e0 [2024-11-13 15:28:09,303 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67fccf6f-2cdd-4805-aa03-8a37a527ffa3/bin/uautomizer-verify-qhAvR1uOyd/data/6c17fe565/83f0ec8cac924ad7853ade4d4a28f25b [2024-11-13 15:28:09,306 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-13 15:28:09,307 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-13 15:28:09,309 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-13 15:28:09,309 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-13 15:28:09,313 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-13 15:28:09,314 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 03:28:09" (1/1) ... [2024-11-13 15:28:09,315 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@208b6d5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:28:09, skipping insertion in model container [2024-11-13 15:28:09,315 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 03:28:09" (1/1) ... [2024-11-13 15:28:09,996 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-13 15:28:10,492 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67fccf6f-2cdd-4805-aa03-8a37a527ffa3/sv-benchmarks/c/eca-rers2018/Problem13.c[778,791] [2024-11-13 15:28:10,530 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67fccf6f-2cdd-4805-aa03-8a37a527ffa3/sv-benchmarks/c/eca-rers2018/Problem13.c[817,830] [2024-11-13 15:28:28,009 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 15:28:28,056 INFO L200 MainTranslator]: Completed pre-run [2024-11-13 15:28:28,083 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67fccf6f-2cdd-4805-aa03-8a37a527ffa3/sv-benchmarks/c/eca-rers2018/Problem13.c[778,791] [2024-11-13 15:28:28,084 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67fccf6f-2cdd-4805-aa03-8a37a527ffa3/sv-benchmarks/c/eca-rers2018/Problem13.c[817,830] [2024-11-13 15:28:30,761 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 15:28:31,915 INFO L204 MainTranslator]: Completed translation [2024-11-13 15:28:31,917 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:28:31 WrapperNode [2024-11-13 15:28:31,921 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-13 15:28:31,923 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-13 15:28:31,925 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-13 15:28:31,925 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-13 15:28:31,942 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:28:31" (1/1) ... [2024-11-13 15:28:32,640 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:28:31" (1/1) ... [2024-11-13 15:28:35,042 INFO L138 Inliner]: procedures = 710, calls = 701, calls flagged for inlining = 597, calls inlined = 597, statements flattened = 108779 [2024-11-13 15:28:35,045 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-13 15:28:35,046 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-13 15:28:35,046 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-13 15:28:35,047 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-13 15:28:35,064 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:28:31" (1/1) ... [2024-11-13 15:28:35,064 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:28:31" (1/1) ... [2024-11-13 15:28:35,517 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:28:31" (1/1) ... [2024-11-13 15:28:36,082 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-11-13 15:28:36,083 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:28:31" (1/1) ... [2024-11-13 15:28:36,083 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:28:31" (1/1) ... [2024-11-13 15:28:36,876 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:28:31" (1/1) ... [2024-11-13 15:28:37,115 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:28:31" (1/1) ... [2024-11-13 15:28:37,216 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:28:31" (1/1) ... [2024-11-13 15:28:37,337 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:28:31" (1/1) ... [2024-11-13 15:28:37,725 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-13 15:28:37,727 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-13 15:28:37,728 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-13 15:28:37,728 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-13 15:28:37,730 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:28:31" (1/1) ... [2024-11-13 15:28:37,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-13 15:28:37,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67fccf6f-2cdd-4805-aa03-8a37a527ffa3/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:28:37,780 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67fccf6f-2cdd-4805-aa03-8a37a527ffa3/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-13 15:28:37,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67fccf6f-2cdd-4805-aa03-8a37a527ffa3/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-13 15:28:37,821 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-13 15:28:37,822 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-13 15:28:37,822 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-13 15:28:37,822 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error_a [2024-11-13 15:28:37,822 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error_a [2024-11-13 15:28:37,822 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error_b [2024-11-13 15:28:37,822 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error_b [2024-11-13 15:28:37,823 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-13 15:28:38,436 INFO L238 CfgBuilder]: Building ICFG [2024-11-13 15:28:38,439 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-13 15:29:06,622 INFO L? ?]: Removed 1451 outVars from TransFormulas that were not future-live. [2024-11-13 15:29:06,623 INFO L287 CfgBuilder]: Performing block encoding [2024-11-13 15:29:06,695 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-13 15:29:06,695 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-13 15:29:06,696 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 03:29:06 BoogieIcfgContainer [2024-11-13 15:29:06,696 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-13 15:29:06,699 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-13 15:29:06,699 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-13 15:29:06,704 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-13 15:29:06,704 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 03:28:09" (1/3) ... [2024-11-13 15:29:06,705 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61730fe2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 03:29:06, skipping insertion in model container [2024-11-13 15:29:06,705 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:28:31" (2/3) ... [2024-11-13 15:29:06,705 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61730fe2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 03:29:06, skipping insertion in model container [2024-11-13 15:29:06,706 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 03:29:06" (3/3) ... [2024-11-13 15:29:06,708 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem13.c [2024-11-13 15:29:06,726 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-13 15:29:06,729 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG Problem13.c that has 3 procedures, 3533 locations, 1 initial locations, 1 loop locations, and 2 error locations. [2024-11-13 15:29:06,914 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-13 15:29:06,930 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@a078d69, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-13 15:29:06,931 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-11-13 15:29:06,950 INFO L276 IsEmpty]: Start isEmpty. Operand has 3533 states, 3428 states have (on average 1.8246791131855309) internal successors, (6255), 3430 states have internal predecessors, (6255), 100 states have call successors, (100), 2 states have call predecessors, (100), 2 states have return successors, (100), 100 states have call predecessors, (100), 100 states have call successors, (100) [2024-11-13 15:29:06,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-13 15:29:06,963 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:29:06,964 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:29:06,964 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:29:06,970 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:29:06,970 INFO L85 PathProgramCache]: Analyzing trace with hash -773775466, now seen corresponding path program 1 times [2024-11-13 15:29:06,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:29:06,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958323172] [2024-11-13 15:29:06,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:29:06,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:29:07,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:29:07,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:29:07,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:29:07,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958323172] [2024-11-13 15:29:07,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958323172] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:29:07,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 15:29:07,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 15:29:07,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850906804] [2024-11-13 15:29:07,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:29:07,936 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 15:29:07,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:29:07,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 15:29:07,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-13 15:29:07,972 INFO L87 Difference]: Start difference. First operand has 3533 states, 3428 states have (on average 1.8246791131855309) internal successors, (6255), 3430 states have internal predecessors, (6255), 100 states have call successors, (100), 2 states have call predecessors, (100), 2 states have return successors, (100), 100 states have call predecessors, (100), 100 states have call successors, (100) Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:29:26,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:29:26,322 INFO L93 Difference]: Finished difference Result 9556 states and 17573 transitions. [2024-11-13 15:29:26,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 15:29:26,329 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2024-11-13 15:29:26,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:29:26,389 INFO L225 Difference]: With dead ends: 9556 [2024-11-13 15:29:26,389 INFO L226 Difference]: Without dead ends: 6016 [2024-11-13 15:29:26,401 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-13 15:29:26,405 INFO L432 NwaCegarLoop]: 6288 mSDtfsCounter, 3165 mSDsluCounter, 3917 mSDsCounter, 0 mSdLazyCounter, 13258 mSolverCounterSat, 612 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3165 SdHoareTripleChecker+Valid, 10205 SdHoareTripleChecker+Invalid, 13870 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 612 IncrementalHoareTripleChecker+Valid, 13258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.7s IncrementalHoareTripleChecker+Time [2024-11-13 15:29:26,406 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3165 Valid, 10205 Invalid, 13870 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [612 Valid, 13258 Invalid, 0 Unknown, 0 Unchecked, 17.7s Time] [2024-11-13 15:29:26,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6016 states. [2024-11-13 15:29:26,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6016 to 5245. [2024-11-13 15:29:26,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5245 states, 5143 states have (on average 1.7841726618705036) internal successors, (9176), 5242 states have internal predecessors, (9176), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:29:26,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5245 states to 5245 states and 9276 transitions. [2024-11-13 15:29:26,725 INFO L78 Accepts]: Start accepts. Automaton has 5245 states and 9276 transitions. Word has length 13 [2024-11-13 15:29:26,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:29:26,726 INFO L471 AbstractCegarLoop]: Abstraction has 5245 states and 9276 transitions. [2024-11-13 15:29:26,726 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:29:26,726 INFO L276 IsEmpty]: Start isEmpty. Operand 5245 states and 9276 transitions. [2024-11-13 15:29:26,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-13 15:29:26,736 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:29:26,736 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:29:26,737 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-13 15:29:26,740 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:29:26,741 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:29:26,741 INFO L85 PathProgramCache]: Analyzing trace with hash 837162710, now seen corresponding path program 1 times [2024-11-13 15:29:26,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:29:26,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658497476] [2024-11-13 15:29:26,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:29:26,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:29:26,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:29:27,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:29:27,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:29:27,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658497476] [2024-11-13 15:29:27,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658497476] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:29:27,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 15:29:27,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 15:29:27,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12738788] [2024-11-13 15:29:27,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:29:27,302 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 15:29:27,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:29:27,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 15:29:27,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-13 15:29:27,305 INFO L87 Difference]: Start difference. First operand 5245 states and 9276 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:29:37,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:29:37,175 INFO L93 Difference]: Finished difference Result 11853 states and 20876 transitions. [2024-11-13 15:29:37,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 15:29:37,176 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2024-11-13 15:29:37,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:29:37,212 INFO L225 Difference]: With dead ends: 11853 [2024-11-13 15:29:37,213 INFO L226 Difference]: Without dead ends: 6610 [2024-11-13 15:29:37,222 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-13 15:29:37,223 INFO L432 NwaCegarLoop]: 6520 mSDtfsCounter, 1942 mSDsluCounter, 3296 mSDsCounter, 0 mSdLazyCounter, 4509 mSolverCounterSat, 255 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1942 SdHoareTripleChecker+Valid, 9816 SdHoareTripleChecker+Invalid, 4764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 255 IncrementalHoareTripleChecker+Valid, 4509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.5s IncrementalHoareTripleChecker+Time [2024-11-13 15:29:37,224 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1942 Valid, 9816 Invalid, 4764 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [255 Valid, 4509 Invalid, 0 Unknown, 0 Unchecked, 9.5s Time] [2024-11-13 15:29:37,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6610 states. [2024-11-13 15:29:37,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6610 to 6115. [2024-11-13 15:29:37,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6115 states, 6013 states have (on average 1.7490437385664395) internal successors, (10517), 6112 states have internal predecessors, (10517), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:29:37,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6115 states to 6115 states and 10617 transitions. [2024-11-13 15:29:37,409 INFO L78 Accepts]: Start accepts. Automaton has 6115 states and 10617 transitions. Word has length 22 [2024-11-13 15:29:37,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:29:37,410 INFO L471 AbstractCegarLoop]: Abstraction has 6115 states and 10617 transitions. [2024-11-13 15:29:37,410 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:29:37,410 INFO L276 IsEmpty]: Start isEmpty. Operand 6115 states and 10617 transitions. [2024-11-13 15:29:37,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-13 15:29:37,412 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:29:37,412 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:29:37,412 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-13 15:29:37,413 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:29:37,413 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:29:37,413 INFO L85 PathProgramCache]: Analyzing trace with hash 965997504, now seen corresponding path program 1 times [2024-11-13 15:29:37,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:29:37,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846133668] [2024-11-13 15:29:37,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:29:37,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:29:37,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:29:37,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:29:37,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:29:37,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846133668] [2024-11-13 15:29:37,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846133668] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:29:37,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 15:29:37,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-13 15:29:37,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269379579] [2024-11-13 15:29:37,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:29:37,608 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 15:29:37,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:29:37,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 15:29:37,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 15:29:37,609 INFO L87 Difference]: Start difference. First operand 6115 states and 10617 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 2 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:29:38,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:29:38,104 INFO L93 Difference]: Finished difference Result 17808 states and 30942 transitions. [2024-11-13 15:29:38,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 15:29:38,105 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 2 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2024-11-13 15:29:38,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:29:38,180 INFO L225 Difference]: With dead ends: 17808 [2024-11-13 15:29:38,181 INFO L226 Difference]: Without dead ends: 11695 [2024-11-13 15:29:38,193 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 15:29:38,194 INFO L432 NwaCegarLoop]: 6287 mSDtfsCounter, 6151 mSDsluCounter, 6031 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6151 SdHoareTripleChecker+Valid, 12318 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-13 15:29:38,196 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6151 Valid, 12318 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-13 15:29:38,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11695 states. [2024-11-13 15:29:38,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11695 to 11596. [2024-11-13 15:29:38,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11596 states, 11494 states have (on average 1.7502175047851052) internal successors, (20117), 11593 states have internal predecessors, (20117), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:29:38,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11596 states to 11596 states and 20217 transitions. [2024-11-13 15:29:38,516 INFO L78 Accepts]: Start accepts. Automaton has 11596 states and 20217 transitions. Word has length 32 [2024-11-13 15:29:38,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:29:38,516 INFO L471 AbstractCegarLoop]: Abstraction has 11596 states and 20217 transitions. [2024-11-13 15:29:38,516 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 2 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:29:38,517 INFO L276 IsEmpty]: Start isEmpty. Operand 11596 states and 20217 transitions. [2024-11-13 15:29:38,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-13 15:29:38,518 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:29:38,518 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:29:38,518 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-13 15:29:38,519 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:29:38,519 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:29:38,523 INFO L85 PathProgramCache]: Analyzing trace with hash -957962752, now seen corresponding path program 1 times [2024-11-13 15:29:38,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:29:38,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548222129] [2024-11-13 15:29:38,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:29:38,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:29:38,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:29:38,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:29:38,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:29:38,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548222129] [2024-11-13 15:29:38,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548222129] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:29:38,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 15:29:38,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 15:29:38,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796020295] [2024-11-13 15:29:38,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:29:38,781 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 15:29:38,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:29:38,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 15:29:38,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 15:29:38,782 INFO L87 Difference]: Start difference. First operand 11596 states and 20217 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:29:40,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:29:40,239 INFO L93 Difference]: Finished difference Result 34103 states and 59476 transitions. [2024-11-13 15:29:40,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 15:29:40,240 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2024-11-13 15:29:40,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:29:40,331 INFO L225 Difference]: With dead ends: 34103 [2024-11-13 15:29:40,331 INFO L226 Difference]: Without dead ends: 22509 [2024-11-13 15:29:40,354 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 15:29:40,355 INFO L432 NwaCegarLoop]: 6742 mSDtfsCounter, 5698 mSDsluCounter, 5872 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5698 SdHoareTripleChecker+Valid, 12614 SdHoareTripleChecker+Invalid, 411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-13 15:29:40,356 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5698 Valid, 12614 Invalid, 411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-13 15:29:40,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22509 states. [2024-11-13 15:29:40,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22509 to 22396. [2024-11-13 15:29:41,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22396 states, 22294 states have (on average 1.7489459047277294) internal successors, (38991), 22393 states have internal predecessors, (38991), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:29:41,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22396 states to 22396 states and 39091 transitions. [2024-11-13 15:29:41,068 INFO L78 Accepts]: Start accepts. Automaton has 22396 states and 39091 transitions. Word has length 32 [2024-11-13 15:29:41,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:29:41,070 INFO L471 AbstractCegarLoop]: Abstraction has 22396 states and 39091 transitions. [2024-11-13 15:29:41,071 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:29:41,071 INFO L276 IsEmpty]: Start isEmpty. Operand 22396 states and 39091 transitions. [2024-11-13 15:29:41,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-13 15:29:41,074 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:29:41,074 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:29:41,075 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-13 15:29:41,075 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:29:41,075 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:29:41,075 INFO L85 PathProgramCache]: Analyzing trace with hash 367224840, now seen corresponding path program 1 times [2024-11-13 15:29:41,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:29:41,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655246570] [2024-11-13 15:29:41,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:29:41,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:29:41,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:29:41,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:29:41,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:29:41,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655246570] [2024-11-13 15:29:41,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655246570] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:29:41,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 15:29:41,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-13 15:29:41,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002592009] [2024-11-13 15:29:41,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:29:41,354 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 15:29:41,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:29:41,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 15:29:41,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 15:29:41,355 INFO L87 Difference]: Start difference. First operand 22396 states and 39091 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 2 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:29:41,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:29:41,965 INFO L93 Difference]: Finished difference Result 66961 states and 116860 transitions. [2024-11-13 15:29:41,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 15:29:41,965 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 2 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2024-11-13 15:29:41,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:29:42,172 INFO L225 Difference]: With dead ends: 66961 [2024-11-13 15:29:42,173 INFO L226 Difference]: Without dead ends: 44567 [2024-11-13 15:29:42,212 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 15:29:42,213 INFO L432 NwaCegarLoop]: 6276 mSDtfsCounter, 6144 mSDsluCounter, 6212 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6144 SdHoareTripleChecker+Valid, 12488 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 15:29:42,213 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6144 Valid, 12488 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 15:29:42,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44567 states. [2024-11-13 15:29:43,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44567 to 44464. [2024-11-13 15:29:43,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44464 states, 44362 states have (on average 1.747937423921374) internal successors, (77542), 44461 states have internal predecessors, (77542), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:29:43,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44464 states to 44464 states and 77642 transitions. [2024-11-13 15:29:43,427 INFO L78 Accepts]: Start accepts. Automaton has 44464 states and 77642 transitions. Word has length 33 [2024-11-13 15:29:43,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:29:43,428 INFO L471 AbstractCegarLoop]: Abstraction has 44464 states and 77642 transitions. [2024-11-13 15:29:43,428 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 2 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:29:43,428 INFO L276 IsEmpty]: Start isEmpty. Operand 44464 states and 77642 transitions. [2024-11-13 15:29:43,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-13 15:29:43,433 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:29:43,433 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:29:43,433 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-13 15:29:43,434 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:29:43,434 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:29:43,434 INFO L85 PathProgramCache]: Analyzing trace with hash -1501625979, now seen corresponding path program 1 times [2024-11-13 15:29:43,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:29:43,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916376598] [2024-11-13 15:29:43,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:29:43,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:29:43,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:29:43,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:29:43,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:29:43,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916376598] [2024-11-13 15:29:43,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916376598] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:29:43,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 15:29:43,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 15:29:43,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933649100] [2024-11-13 15:29:43,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:29:43,671 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 15:29:43,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:29:43,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 15:29:43,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 15:29:43,672 INFO L87 Difference]: Start difference. First operand 44464 states and 77642 transitions. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:29:51,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:29:51,012 INFO L93 Difference]: Finished difference Result 117524 states and 207236 transitions. [2024-11-13 15:29:51,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 15:29:51,018 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2024-11-13 15:29:51,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:29:51,303 INFO L225 Difference]: With dead ends: 117524 [2024-11-13 15:29:51,304 INFO L226 Difference]: Without dead ends: 73062 [2024-11-13 15:29:51,372 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 15:29:51,373 INFO L432 NwaCegarLoop]: 7468 mSDtfsCounter, 4604 mSDsluCounter, 4345 mSDsCounter, 0 mSdLazyCounter, 802 mSolverCounterSat, 2133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4604 SdHoareTripleChecker+Valid, 11813 SdHoareTripleChecker+Invalid, 2935 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2133 IncrementalHoareTripleChecker+Valid, 802 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2024-11-13 15:29:51,378 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4604 Valid, 11813 Invalid, 2935 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2133 Valid, 802 Invalid, 0 Unknown, 0 Unchecked, 6.7s Time] [2024-11-13 15:29:51,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73062 states. [2024-11-13 15:29:52,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73062 to 71260. [2024-11-13 15:29:52,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71260 states, 71158 states have (on average 1.7639337811630456) internal successors, (125518), 71257 states have internal predecessors, (125518), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:29:53,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71260 states to 71260 states and 125618 transitions. [2024-11-13 15:29:53,048 INFO L78 Accepts]: Start accepts. Automaton has 71260 states and 125618 transitions. Word has length 34 [2024-11-13 15:29:53,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:29:53,049 INFO L471 AbstractCegarLoop]: Abstraction has 71260 states and 125618 transitions. [2024-11-13 15:29:53,050 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:29:53,050 INFO L276 IsEmpty]: Start isEmpty. Operand 71260 states and 125618 transitions. [2024-11-13 15:29:53,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-13 15:29:53,053 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:29:53,053 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:29:53,053 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-13 15:29:53,054 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:29:53,054 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:29:53,054 INFO L85 PathProgramCache]: Analyzing trace with hash 693547565, now seen corresponding path program 1 times [2024-11-13 15:29:53,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:29:53,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853053146] [2024-11-13 15:29:53,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:29:53,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:29:53,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:29:53,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:29:53,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:29:53,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853053146] [2024-11-13 15:29:53,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853053146] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:29:53,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 15:29:53,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-13 15:29:53,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146612717] [2024-11-13 15:29:53,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:29:53,290 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 15:29:53,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:29:53,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 15:29:53,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 15:29:53,291 INFO L87 Difference]: Start difference. First operand 71260 states and 125618 transitions. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 2 states have internal predecessors, (34), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:29:55,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:29:55,398 INFO L93 Difference]: Finished difference Result 211126 states and 372228 transitions. [2024-11-13 15:29:55,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 15:29:55,398 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 2 states have internal predecessors, (34), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2024-11-13 15:29:55,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:29:55,677 INFO L225 Difference]: With dead ends: 211126 [2024-11-13 15:29:55,677 INFO L226 Difference]: Without dead ends: 139868 [2024-11-13 15:29:55,744 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 15:29:55,745 INFO L432 NwaCegarLoop]: 6351 mSDtfsCounter, 6023 mSDsluCounter, 6083 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6023 SdHoareTripleChecker+Valid, 12434 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-13 15:29:55,746 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6023 Valid, 12434 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-13 15:29:55,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139868 states. [2024-11-13 15:29:57,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139868 to 139762. [2024-11-13 15:29:57,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139762 states, 139660 states have (on average 1.7631390519833883) internal successors, (246240), 139759 states have internal predecessors, (246240), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:29:58,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139762 states to 139762 states and 246340 transitions. [2024-11-13 15:29:58,300 INFO L78 Accepts]: Start accepts. Automaton has 139762 states and 246340 transitions. Word has length 35 [2024-11-13 15:29:58,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:29:58,300 INFO L471 AbstractCegarLoop]: Abstraction has 139762 states and 246340 transitions. [2024-11-13 15:29:58,300 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 2 states have internal predecessors, (34), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:29:58,300 INFO L276 IsEmpty]: Start isEmpty. Operand 139762 states and 246340 transitions. [2024-11-13 15:29:58,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-13 15:29:58,303 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:29:58,303 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:29:58,303 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-13 15:29:58,303 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:29:58,304 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:29:58,304 INFO L85 PathProgramCache]: Analyzing trace with hash -1877384456, now seen corresponding path program 1 times [2024-11-13 15:29:58,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:29:58,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788736603] [2024-11-13 15:29:58,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:29:58,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:29:58,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:29:59,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:29:59,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:29:59,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788736603] [2024-11-13 15:29:59,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788736603] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:29:59,222 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 15:29:59,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 15:29:59,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729234642] [2024-11-13 15:29:59,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:29:59,223 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 15:29:59,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:29:59,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 15:29:59,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-13 15:29:59,223 INFO L87 Difference]: Start difference. First operand 139762 states and 246340 transitions. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 3 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:30:13,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:30:13,923 INFO L93 Difference]: Finished difference Result 320985 states and 565547 transitions. [2024-11-13 15:30:13,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 15:30:13,924 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 3 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2024-11-13 15:30:13,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:30:14,338 INFO L225 Difference]: With dead ends: 320985 [2024-11-13 15:30:14,338 INFO L226 Difference]: Without dead ends: 181225 [2024-11-13 15:30:14,446 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-13 15:30:14,447 INFO L432 NwaCegarLoop]: 7271 mSDtfsCounter, 4572 mSDsluCounter, 3663 mSDsCounter, 0 mSdLazyCounter, 6651 mSolverCounterSat, 419 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4572 SdHoareTripleChecker+Valid, 10934 SdHoareTripleChecker+Invalid, 7070 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 419 IncrementalHoareTripleChecker+Valid, 6651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.3s IncrementalHoareTripleChecker+Time [2024-11-13 15:30:14,448 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4572 Valid, 10934 Invalid, 7070 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [419 Valid, 6651 Invalid, 0 Unknown, 0 Unchecked, 13.3s Time] [2024-11-13 15:30:14,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181225 states. [2024-11-13 15:30:16,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181225 to 169162. [2024-11-13 15:30:16,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169162 states, 169060 states have (on average 1.747143026144564) internal successors, (295372), 169159 states have internal predecessors, (295372), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:30:17,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169162 states to 169162 states and 295472 transitions. [2024-11-13 15:30:17,327 INFO L78 Accepts]: Start accepts. Automaton has 169162 states and 295472 transitions. Word has length 36 [2024-11-13 15:30:17,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:30:17,329 INFO L471 AbstractCegarLoop]: Abstraction has 169162 states and 295472 transitions. [2024-11-13 15:30:17,329 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 3 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:30:17,329 INFO L276 IsEmpty]: Start isEmpty. Operand 169162 states and 295472 transitions. [2024-11-13 15:30:17,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-13 15:30:17,332 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:30:17,332 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:30:17,332 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-13 15:30:17,334 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:30:17,334 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:30:17,334 INFO L85 PathProgramCache]: Analyzing trace with hash 757508178, now seen corresponding path program 1 times [2024-11-13 15:30:17,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:30:17,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144153868] [2024-11-13 15:30:17,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:30:17,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:30:17,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:30:17,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:30:17,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:30:17,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144153868] [2024-11-13 15:30:17,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144153868] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:30:17,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 15:30:17,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 15:30:17,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962222848] [2024-11-13 15:30:17,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:30:17,489 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 15:30:17,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:30:17,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 15:30:17,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 15:30:17,490 INFO L87 Difference]: Start difference. First operand 169162 states and 295472 transitions. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)