./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_25-while_file-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4fc63b2a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc1a6b3f-35b6-46cb-a992-4cdc2b8cdefc/bin/uautomizer-verify-4GaUIPS5ZU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc1a6b3f-35b6-46cb-a992-4cdc2b8cdefc/bin/uautomizer-verify-4GaUIPS5ZU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc1a6b3f-35b6-46cb-a992-4cdc2b8cdefc/bin/uautomizer-verify-4GaUIPS5ZU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc1a6b3f-35b6-46cb-a992-4cdc2b8cdefc/bin/uautomizer-verify-4GaUIPS5ZU/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_25-while_file-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc1a6b3f-35b6-46cb-a992-4cdc2b8cdefc/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc1a6b3f-35b6-46cb-a992-4cdc2b8cdefc/bin/uautomizer-verify-4GaUIPS5ZU --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 797978612f30d276056fc2b56f0a1bab84683294631fe6e91b1bcc4d4c68636a --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-10-31 22:12:24,741 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-31 22:12:24,832 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc1a6b3f-35b6-46cb-a992-4cdc2b8cdefc/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-31 22:12:24,838 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-31 22:12:24,839 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-31 22:12:24,870 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-31 22:12:24,870 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-31 22:12:24,871 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-31 22:12:24,871 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-31 22:12:24,872 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-31 22:12:24,873 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-31 22:12:24,873 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-31 22:12:24,874 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-31 22:12:24,874 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-31 22:12:24,875 INFO L153 SettingsManager]: * Use SBE=true [2024-10-31 22:12:24,875 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-31 22:12:24,876 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-31 22:12:24,876 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-31 22:12:24,877 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-31 22:12:24,877 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-31 22:12:24,878 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-31 22:12:24,878 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-31 22:12:24,879 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-31 22:12:24,879 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-31 22:12:24,879 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-31 22:12:24,880 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-31 22:12:24,880 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-31 22:12:24,880 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-31 22:12:24,881 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-31 22:12:24,881 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-31 22:12:24,881 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-31 22:12:24,886 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-31 22:12:24,886 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:12:24,887 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-31 22:12:24,887 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-31 22:12:24,891 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-31 22:12:24,891 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-31 22:12:24,891 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-31 22:12:24,892 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-31 22:12:24,892 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-31 22:12:24,892 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-31 22:12:24,893 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-31 22:12:24,893 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc1a6b3f-35b6-46cb-a992-4cdc2b8cdefc/bin/uautomizer-verify-4GaUIPS5ZU/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc1a6b3f-35b6-46cb-a992-4cdc2b8cdefc/bin/uautomizer-verify-4GaUIPS5ZU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 797978612f30d276056fc2b56f0a1bab84683294631fe6e91b1bcc4d4c68636a [2024-10-31 22:12:25,183 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-31 22:12:25,214 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-31 22:12:25,217 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-31 22:12:25,219 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-31 22:12:25,220 INFO L274 PluginConnector]: CDTParser initialized [2024-10-31 22:12:25,221 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc1a6b3f-35b6-46cb-a992-4cdc2b8cdefc/bin/uautomizer-verify-4GaUIPS5ZU/../../sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_25-while_file-2.i Unable to find full path for "g++" [2024-10-31 22:12:27,274 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-31 22:12:27,526 INFO L384 CDTParser]: Found 1 translation units. [2024-10-31 22:12:27,526 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc1a6b3f-35b6-46cb-a992-4cdc2b8cdefc/sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_25-while_file-2.i [2024-10-31 22:12:27,534 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc1a6b3f-35b6-46cb-a992-4cdc2b8cdefc/bin/uautomizer-verify-4GaUIPS5ZU/data/61e50e8a8/75762a1a4c8441c38f40dfe1188ec0de/FLAGcc498e86b [2024-10-31 22:12:27,548 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc1a6b3f-35b6-46cb-a992-4cdc2b8cdefc/bin/uautomizer-verify-4GaUIPS5ZU/data/61e50e8a8/75762a1a4c8441c38f40dfe1188ec0de [2024-10-31 22:12:27,551 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-31 22:12:27,552 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-31 22:12:27,554 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-31 22:12:27,554 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-31 22:12:27,560 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-31 22:12:27,561 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:12:27" (1/1) ... [2024-10-31 22:12:27,564 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31b2da4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:12:27, skipping insertion in model container [2024-10-31 22:12:27,565 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:12:27" (1/1) ... [2024-10-31 22:12:27,590 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-31 22:12:27,763 WARN L251 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_bc1a6b3f-35b6-46cb-a992-4cdc2b8cdefc/sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_25-while_file-2.i[914,927] [2024-10-31 22:12:27,816 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:12:27,826 INFO L200 MainTranslator]: Completed pre-run [2024-10-31 22:12:27,837 WARN L251 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_bc1a6b3f-35b6-46cb-a992-4cdc2b8cdefc/sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_25-while_file-2.i[914,927] [2024-10-31 22:12:27,856 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:12:27,876 INFO L204 MainTranslator]: Completed translation [2024-10-31 22:12:27,876 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:12:27 WrapperNode [2024-10-31 22:12:27,876 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-31 22:12:27,877 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-31 22:12:27,878 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-31 22:12:27,878 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-31 22:12:27,886 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:12:27" (1/1) ... [2024-10-31 22:12:27,898 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:12:27" (1/1) ... [2024-10-31 22:12:27,943 INFO L138 Inliner]: procedures = 26, calls = 21, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 83 [2024-10-31 22:12:27,947 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-31 22:12:27,948 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-31 22:12:27,948 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-31 22:12:27,948 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-31 22:12:27,970 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:12:27" (1/1) ... [2024-10-31 22:12:27,971 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:12:27" (1/1) ... [2024-10-31 22:12:27,974 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:12:27" (1/1) ... [2024-10-31 22:12:27,997 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]. [2024-10-31 22:12:27,998 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:12:27" (1/1) ... [2024-10-31 22:12:27,998 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:12:27" (1/1) ... [2024-10-31 22:12:28,005 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:12:27" (1/1) ... [2024-10-31 22:12:28,013 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:12:27" (1/1) ... [2024-10-31 22:12:28,014 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:12:27" (1/1) ... [2024-10-31 22:12:28,020 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:12:27" (1/1) ... [2024-10-31 22:12:28,022 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-31 22:12:28,030 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-31 22:12:28,030 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-31 22:12:28,030 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-31 22:12:28,031 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:12:27" (1/1) ... [2024-10-31 22:12:28,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:12:28,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc1a6b3f-35b6-46cb-a992-4cdc2b8cdefc/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:12:28,080 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc1a6b3f-35b6-46cb-a992-4cdc2b8cdefc/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-31 22:12:28,089 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc1a6b3f-35b6-46cb-a992-4cdc2b8cdefc/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-31 22:12:28,115 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-31 22:12:28,115 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-10-31 22:12:28,116 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-10-31 22:12:28,117 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-31 22:12:28,117 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-31 22:12:28,117 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-31 22:12:28,201 INFO L238 CfgBuilder]: Building ICFG [2024-10-31 22:12:28,205 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-31 22:12:28,461 INFO L? ?]: Removed 14 outVars from TransFormulas that were not future-live. [2024-10-31 22:12:28,461 INFO L287 CfgBuilder]: Performing block encoding [2024-10-31 22:12:28,484 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-31 22:12:28,487 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-10-31 22:12:28,487 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:12:28 BoogieIcfgContainer [2024-10-31 22:12:28,488 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-31 22:12:28,491 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-31 22:12:28,493 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-31 22:12:28,497 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-31 22:12:28,497 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.10 10:12:27" (1/3) ... [2024-10-31 22:12:28,499 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2dead5da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:12:28, skipping insertion in model container [2024-10-31 22:12:28,499 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:12:27" (2/3) ... [2024-10-31 22:12:28,499 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2dead5da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:12:28, skipping insertion in model container [2024-10-31 22:12:28,500 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:12:28" (3/3) ... [2024-10-31 22:12:28,501 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_loopvsstraightlinecode_25-while_file-2.i [2024-10-31 22:12:28,520 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-31 22:12:28,521 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-31 22:12:28,591 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-31 22:12:28,602 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;@6855cbe6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-31 22:12:28,602 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-31 22:12:28,609 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 29 states have internal predecessors, (39), 8 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-10-31 22:12:28,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-10-31 22:12:28,622 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:12:28,623 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:12:28,625 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:12:28,632 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:12:28,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1975457994, now seen corresponding path program 1 times [2024-10-31 22:12:28,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:12:28,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295698212] [2024-10-31 22:12:28,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:12:28,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:12:28,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:12:28,985 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-31 22:12:28,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:12:29,000 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-31 22:12:29,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:12:29,019 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-31 22:12:29,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:12:29,029 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-10-31 22:12:29,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:12:29,042 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-10-31 22:12:29,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:12:29,048 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-10-31 22:12:29,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:12:29,060 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-10-31 22:12:29,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:12:29,070 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-10-31 22:12:29,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:12:29,087 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-10-31 22:12:29,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:12:29,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295698212] [2024-10-31 22:12:29,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295698212] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:12:29,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:12:29,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 22:12:29,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243604445] [2024-10-31 22:12:29,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:12:29,099 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-31 22:12:29,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:12:29,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-31 22:12:29,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-31 22:12:29,137 INFO L87 Difference]: Start difference. First operand has 39 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 29 states have internal predecessors, (39), 8 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 2 states, 2 states have (on average 10.5) internal successors, (21), 2 states have internal predecessors, (21), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 1 states have call predecessors, (8), 2 states have call successors, (8) [2024-10-31 22:12:29,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:12:29,204 INFO L93 Difference]: Finished difference Result 71 states and 112 transitions. [2024-10-31 22:12:29,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-31 22:12:29,210 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 10.5) internal successors, (21), 2 states have internal predecessors, (21), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 1 states have call predecessors, (8), 2 states have call successors, (8) Word has length 58 [2024-10-31 22:12:29,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:12:29,230 INFO L225 Difference]: With dead ends: 71 [2024-10-31 22:12:29,235 INFO L226 Difference]: Without dead ends: 35 [2024-10-31 22:12:29,239 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-31 22:12:29,248 INFO L432 NwaCegarLoop]: 48 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 22:12:29,255 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 22:12:29,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-10-31 22:12:29,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2024-10-31 22:12:29,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 25 states have (on average 1.28) internal successors, (32), 25 states have internal predecessors, (32), 8 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-10-31 22:12:29,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 48 transitions. [2024-10-31 22:12:29,320 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 48 transitions. Word has length 58 [2024-10-31 22:12:29,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:12:29,320 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 48 transitions. [2024-10-31 22:12:29,324 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 10.5) internal successors, (21), 2 states have internal predecessors, (21), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 1 states have call predecessors, (8), 2 states have call successors, (8) [2024-10-31 22:12:29,326 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 48 transitions. [2024-10-31 22:12:29,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-10-31 22:12:29,331 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:12:29,331 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:12:29,331 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-31 22:12:29,332 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:12:29,333 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:12:29,333 INFO L85 PathProgramCache]: Analyzing trace with hash -1325377738, now seen corresponding path program 1 times [2024-10-31 22:12:29,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:12:29,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856963159] [2024-10-31 22:12:29,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:12:29,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:12:29,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:12:33,228 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-31 22:12:33,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:12:33,236 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-31 22:12:33,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:12:33,250 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-31 22:12:33,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:12:33,259 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-10-31 22:12:33,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:12:33,266 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-10-31 22:12:33,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:12:33,272 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-10-31 22:12:33,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:12:33,285 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-10-31 22:12:33,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:12:33,292 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-10-31 22:12:33,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:12:33,301 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-10-31 22:12:33,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:12:33,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856963159] [2024-10-31 22:12:33,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856963159] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:12:33,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:12:33,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-10-31 22:12:33,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581695862] [2024-10-31 22:12:33,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:12:33,305 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-31 22:12:33,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:12:33,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-31 22:12:33,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-10-31 22:12:33,310 INFO L87 Difference]: Start difference. First operand 35 states and 48 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 1 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2024-10-31 22:12:34,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:12:34,675 INFO L93 Difference]: Finished difference Result 135 states and 182 transitions. [2024-10-31 22:12:34,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-10-31 22:12:34,676 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 1 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) Word has length 58 [2024-10-31 22:12:34,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:12:34,678 INFO L225 Difference]: With dead ends: 135 [2024-10-31 22:12:34,679 INFO L226 Difference]: Without dead ends: 103 [2024-10-31 22:12:34,679 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=140, Invalid=280, Unknown=0, NotChecked=0, Total=420 [2024-10-31 22:12:34,681 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 121 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-10-31 22:12:34,681 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 221 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-10-31 22:12:34,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2024-10-31 22:12:34,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 78. [2024-10-31 22:12:34,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 59 states have (on average 1.2881355932203389) internal successors, (76), 59 states have internal predecessors, (76), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2024-10-31 22:12:34,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 108 transitions. [2024-10-31 22:12:34,716 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 108 transitions. Word has length 58 [2024-10-31 22:12:34,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:12:34,717 INFO L471 AbstractCegarLoop]: Abstraction has 78 states and 108 transitions. [2024-10-31 22:12:34,717 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 1 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2024-10-31 22:12:34,718 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 108 transitions. [2024-10-31 22:12:34,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-10-31 22:12:34,721 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:12:34,721 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:12:34,721 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-31 22:12:34,722 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:12:34,723 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:12:34,724 INFO L85 PathProgramCache]: Analyzing trace with hash -2005436108, now seen corresponding path program 1 times [2024-10-31 22:12:34,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:12:34,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144504793] [2024-10-31 22:12:34,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:12:34,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:12:34,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:12:49,792 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-31 22:12:49,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:12:49,796 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-31 22:12:49,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:12:49,799 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-31 22:12:49,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:12:49,802 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-10-31 22:12:49,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:12:49,805 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-10-31 22:12:49,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:12:49,808 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-10-31 22:12:49,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:12:49,811 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-10-31 22:12:49,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:12:49,814 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-10-31 22:12:49,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:12:49,818 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-10-31 22:12:49,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:12:49,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144504793] [2024-10-31 22:12:49,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144504793] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:12:49,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:12:49,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-10-31 22:12:49,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173600272] [2024-10-31 22:12:49,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:12:49,820 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-31 22:12:49,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:12:49,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-31 22:12:49,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-10-31 22:12:49,821 INFO L87 Difference]: Start difference. First operand 78 states and 108 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 1 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2024-10-31 22:12:53,748 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.46s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-10-31 22:12:58,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:12:58,355 INFO L93 Difference]: Finished difference Result 123 states and 163 transitions. [2024-10-31 22:12:58,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-31 22:12:58,358 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 1 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) Word has length 58 [2024-10-31 22:12:58,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:12:58,359 INFO L225 Difference]: With dead ends: 123 [2024-10-31 22:12:58,359 INFO L226 Difference]: Without dead ends: 121 [2024-10-31 22:12:58,360 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2024-10-31 22:12:58,364 INFO L432 NwaCegarLoop]: 53 mSDtfsCounter, 58 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2024-10-31 22:12:58,364 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 229 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2024-10-31 22:12:58,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2024-10-31 22:12:58,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 84. [2024-10-31 22:12:58,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 65 states have (on average 1.3076923076923077) internal successors, (85), 65 states have internal predecessors, (85), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2024-10-31 22:12:58,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 117 transitions. [2024-10-31 22:12:58,385 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 117 transitions. Word has length 58 [2024-10-31 22:12:58,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:12:58,385 INFO L471 AbstractCegarLoop]: Abstraction has 84 states and 117 transitions. [2024-10-31 22:12:58,386 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 1 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2024-10-31 22:12:58,386 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 117 transitions. [2024-10-31 22:12:58,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-10-31 22:12:58,387 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:12:58,387 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:12:58,390 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-31 22:12:58,390 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:12:58,391 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:12:58,391 INFO L85 PathProgramCache]: Analyzing trace with hash 1479639413, now seen corresponding path program 1 times [2024-10-31 22:12:58,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:12:58,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958920574] [2024-10-31 22:12:58,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:12:58,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:12:58,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:12:58,607 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-31 22:12:58,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:12:58,612 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-31 22:12:58,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:12:58,617 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-31 22:12:58,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:12:58,622 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-10-31 22:12:58,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:12:58,627 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-10-31 22:12:58,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:12:58,631 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-10-31 22:12:58,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:12:58,637 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-10-31 22:12:58,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:12:58,641 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-10-31 22:12:58,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:12:58,646 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-10-31 22:12:58,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:12:58,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958920574] [2024-10-31 22:12:58,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958920574] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:12:58,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:12:58,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-31 22:12:58,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035777192] [2024-10-31 22:12:58,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:12:58,649 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-31 22:12:58,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:12:58,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-31 22:12:58,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-31 22:12:58,650 INFO L87 Difference]: Start difference. First operand 84 states and 117 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 1 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2024-10-31 22:12:58,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:12:58,872 INFO L93 Difference]: Finished difference Result 155 states and 211 transitions. [2024-10-31 22:12:58,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-31 22:12:58,873 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 1 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) Word has length 59 [2024-10-31 22:12:58,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:12:58,874 INFO L225 Difference]: With dead ends: 155 [2024-10-31 22:12:58,875 INFO L226 Difference]: Without dead ends: 116 [2024-10-31 22:12:58,875 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2024-10-31 22:12:58,876 INFO L432 NwaCegarLoop]: 64 mSDtfsCounter, 81 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-31 22:12:58,877 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 178 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-31 22:12:58,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2024-10-31 22:12:58,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 85. [2024-10-31 22:12:58,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 66 states have (on average 1.2878787878787878) internal successors, (85), 66 states have internal predecessors, (85), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2024-10-31 22:12:58,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 117 transitions. [2024-10-31 22:12:58,892 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 117 transitions. Word has length 59 [2024-10-31 22:12:58,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:12:58,892 INFO L471 AbstractCegarLoop]: Abstraction has 85 states and 117 transitions. [2024-10-31 22:12:58,893 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 1 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2024-10-31 22:12:58,893 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 117 transitions. [2024-10-31 22:12:58,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-10-31 22:12:58,894 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:12:58,894 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:12:58,895 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-31 22:12:58,895 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:12:58,895 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:12:58,895 INFO L85 PathProgramCache]: Analyzing trace with hash -1179125083, now seen corresponding path program 1 times [2024-10-31 22:12:58,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:12:58,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043498084] [2024-10-31 22:12:58,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:12:58,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:12:58,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat