./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursified_nla-digbench/recursified_cohendiv-ll.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a046e57d Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursified_nla-digbench/recursified_cohendiv-ll.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --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 7c6261a52ba91bad3864c182e4633afd262bc5fe07cf18f92cb66db83623b9ae --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-mul-div-a046e57-m [2024-10-12 19:49:16,040 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-12 19:49:16,109 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-12 19:49:16,115 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-12 19:49:16,116 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-12 19:49:16,145 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-12 19:49:16,146 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-12 19:49:16,146 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-12 19:49:16,147 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-12 19:49:16,148 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-12 19:49:16,149 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-12 19:49:16,149 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-12 19:49:16,149 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-12 19:49:16,151 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-12 19:49:16,152 INFO L153 SettingsManager]: * Use SBE=true [2024-10-12 19:49:16,152 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-12 19:49:16,152 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-12 19:49:16,153 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-12 19:49:16,153 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-12 19:49:16,153 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-12 19:49:16,153 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-12 19:49:16,157 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-12 19:49:16,157 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-12 19:49:16,157 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-12 19:49:16,158 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-12 19:49:16,158 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-12 19:49:16,158 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-12 19:49:16,158 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-12 19:49:16,159 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-12 19:49:16,159 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-12 19:49:16,159 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-12 19:49:16,159 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-12 19:49:16,160 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-12 19:49:16,160 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-12 19:49:16,160 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-12 19:49:16,160 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-12 19:49:16,160 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-12 19:49:16,161 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-12 19:49:16,161 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-12 19:49:16,161 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-12 19:49:16,162 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-12 19:49:16,162 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-12 19:49:16,162 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:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7c6261a52ba91bad3864c182e4633afd262bc5fe07cf18f92cb66db83623b9ae [2024-10-12 19:49:16,426 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-12 19:49:16,454 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-12 19:49:16,456 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-12 19:49:16,458 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-12 19:49:16,458 INFO L274 PluginConnector]: CDTParser initialized [2024-10-12 19:49:16,459 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursified_nla-digbench/recursified_cohendiv-ll.c [2024-10-12 19:49:17,763 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-12 19:49:17,933 INFO L384 CDTParser]: Found 1 translation units. [2024-10-12 19:49:17,933 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursified_nla-digbench/recursified_cohendiv-ll.c [2024-10-12 19:49:17,940 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a7fbb6167/3799fb42e8724856829a93cfaae47ebf/FLAGa41ce7095 [2024-10-12 19:49:17,951 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a7fbb6167/3799fb42e8724856829a93cfaae47ebf [2024-10-12 19:49:17,954 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-12 19:49:17,955 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-12 19:49:17,956 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-12 19:49:17,956 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-12 19:49:17,962 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-12 19:49:17,963 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 07:49:17" (1/1) ... [2024-10-12 19:49:17,965 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e2a6107 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:49:17, skipping insertion in model container [2024-10-12 19:49:17,965 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 07:49:17" (1/1) ... [2024-10-12 19:49:17,988 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-12 19:49:18,174 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursified_nla-digbench/recursified_cohendiv-ll.c[1136,1149] [2024-10-12 19:49:18,192 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-12 19:49:18,204 INFO L200 MainTranslator]: Completed pre-run [2024-10-12 19:49:18,215 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursified_nla-digbench/recursified_cohendiv-ll.c[1136,1149] [2024-10-12 19:49:18,226 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-12 19:49:18,237 INFO L204 MainTranslator]: Completed translation [2024-10-12 19:49:18,238 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:49:18 WrapperNode [2024-10-12 19:49:18,238 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-12 19:49:18,239 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-12 19:49:18,239 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-12 19:49:18,239 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-12 19:49:18,246 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:49:18" (1/1) ... [2024-10-12 19:49:18,252 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:49:18" (1/1) ... [2024-10-12 19:49:18,270 INFO L138 Inliner]: procedures = 17, calls = 84, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 71 [2024-10-12 19:49:18,270 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-12 19:49:18,271 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-12 19:49:18,271 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-12 19:49:18,271 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-12 19:49:18,280 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:49:18" (1/1) ... [2024-10-12 19:49:18,280 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:49:18" (1/1) ... [2024-10-12 19:49:18,283 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:49:18" (1/1) ... [2024-10-12 19:49:18,299 INFO L175 MemorySlicer]: Split 49 memory accesses to 7 slices as follows [2, 6, 8, 8, 10, 5, 10]. 20 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0, 0, 0]. The 12 writes are split as follows [0, 2, 3, 3, 2, 1, 1]. [2024-10-12 19:49:18,300 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:49:18" (1/1) ... [2024-10-12 19:49:18,300 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:49:18" (1/1) ... [2024-10-12 19:49:18,306 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:49:18" (1/1) ... [2024-10-12 19:49:18,307 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:49:18" (1/1) ... [2024-10-12 19:49:18,309 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:49:18" (1/1) ... [2024-10-12 19:49:18,310 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:49:18" (1/1) ... [2024-10-12 19:49:18,313 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-12 19:49:18,314 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-12 19:49:18,314 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-12 19:49:18,314 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-12 19:49:18,315 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:49:18" (1/1) ... [2024-10-12 19:49:18,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-12 19:49:18,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 19:49:18,357 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-12 19:49:18,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-12 19:49:18,404 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-12 19:49:18,405 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-12 19:49:18,406 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-12 19:49:18,406 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-12 19:49:18,406 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-10-12 19:49:18,406 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-10-12 19:49:18,406 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-10-12 19:49:18,406 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2024-10-12 19:49:18,408 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-12 19:49:18,408 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_41_to_52_0 [2024-10-12 19:49:18,408 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_41_to_52_0 [2024-10-12 19:49:18,408 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_32_to_55_0 [2024-10-12 19:49:18,408 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_32_to_55_0 [2024-10-12 19:49:18,408 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-12 19:49:18,409 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-12 19:49:18,409 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-12 19:49:18,409 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-10-12 19:49:18,409 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-10-12 19:49:18,410 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-10-12 19:49:18,410 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#6 [2024-10-12 19:49:18,410 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-12 19:49:18,410 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-12 19:49:18,411 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-12 19:49:18,411 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-12 19:49:18,411 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-12 19:49:18,411 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-10-12 19:49:18,411 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-10-12 19:49:18,411 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-10-12 19:49:18,412 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2024-10-12 19:49:18,412 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-10-12 19:49:18,413 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-10-12 19:49:18,413 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-12 19:49:18,539 INFO L238 CfgBuilder]: Building ICFG [2024-10-12 19:49:18,541 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-12 19:49:18,814 INFO L? ?]: Removed 11 outVars from TransFormulas that were not future-live. [2024-10-12 19:49:18,815 INFO L287 CfgBuilder]: Performing block encoding [2024-10-12 19:49:18,856 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-12 19:49:18,857 INFO L314 CfgBuilder]: Removed 2 assume(true) statements. [2024-10-12 19:49:18,857 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 07:49:18 BoogieIcfgContainer [2024-10-12 19:49:18,857 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-12 19:49:18,859 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-12 19:49:18,859 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-12 19:49:18,863 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-12 19:49:18,863 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 07:49:17" (1/3) ... [2024-10-12 19:49:18,864 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cc4f3df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 07:49:18, skipping insertion in model container [2024-10-12 19:49:18,864 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:49:18" (2/3) ... [2024-10-12 19:49:18,864 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cc4f3df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 07:49:18, skipping insertion in model container [2024-10-12 19:49:18,864 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 07:49:18" (3/3) ... [2024-10-12 19:49:18,866 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_cohendiv-ll.c [2024-10-12 19:49:18,880 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-12 19:49:18,881 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-12 19:49:18,941 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-12 19:49:18,949 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;@73e16922, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-12 19:49:18,949 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-12 19:49:18,952 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 27 states have internal predecessors, (31), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-10-12 19:49:18,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-10-12 19:49:18,958 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 19:49:18,959 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 19:49:18,959 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 19:49:18,963 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 19:49:18,963 INFO L85 PathProgramCache]: Analyzing trace with hash 779716243, now seen corresponding path program 1 times [2024-10-12 19:49:18,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 19:49:18,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519562145] [2024-10-12 19:49:18,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 19:49:18,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 19:49:19,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:49:19,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 19:49:19,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 19:49:19,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519562145] [2024-10-12 19:49:19,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519562145] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 19:49:19,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-12 19:49:19,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-12 19:49:19,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214093490] [2024-10-12 19:49:19,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 19:49:19,178 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-12 19:49:19,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 19:49:19,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-12 19:49:19,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-12 19:49:19,202 INFO L87 Difference]: Start difference. First operand has 40 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 27 states have internal predecessors, (31), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 19:49:19,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 19:49:19,236 INFO L93 Difference]: Finished difference Result 78 states and 114 transitions. [2024-10-12 19:49:19,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-12 19:49:19,239 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-10-12 19:49:19,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 19:49:19,246 INFO L225 Difference]: With dead ends: 78 [2024-10-12 19:49:19,246 INFO L226 Difference]: Without dead ends: 38 [2024-10-12 19:49:19,251 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-12 19:49:19,254 INFO L432 NwaCegarLoop]: 47 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-12 19:49:19,254 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 47 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-12 19:49:19,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2024-10-12 19:49:19,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2024-10-12 19:49:19,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 26 states have internal predecessors, (26), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-10-12 19:49:19,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 47 transitions. [2024-10-12 19:49:19,285 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 47 transitions. Word has length 10 [2024-10-12 19:49:19,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 19:49:19,286 INFO L471 AbstractCegarLoop]: Abstraction has 38 states and 47 transitions. [2024-10-12 19:49:19,286 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 19:49:19,286 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 47 transitions. [2024-10-12 19:49:19,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-10-12 19:49:19,288 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 19:49:19,289 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 19:49:19,289 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-12 19:49:19,289 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 19:49:19,290 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 19:49:19,290 INFO L85 PathProgramCache]: Analyzing trace with hash 1459774613, now seen corresponding path program 1 times [2024-10-12 19:49:19,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 19:49:19,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843411714] [2024-10-12 19:49:19,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 19:49:19,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 19:49:19,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-12 19:49:19,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [255295758] [2024-10-12 19:49:19,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 19:49:19,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 19:49:19,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 19:49:19,364 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 19:49:19,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-12 19:49:19,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:49:19,536 INFO L255 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-10-12 19:49:19,547 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 19:49:19,633 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-12 19:49:19,647 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-12 19:49:19,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 19:49:19,762 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-12 19:49:19,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 19:49:19,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843411714] [2024-10-12 19:49:19,763 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-12 19:49:19,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255295758] [2024-10-12 19:49:19,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255295758] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 19:49:19,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-12 19:49:19,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-10-12 19:49:19,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67697879] [2024-10-12 19:49:19,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 19:49:19,766 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-12 19:49:19,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 19:49:19,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-12 19:49:19,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-10-12 19:49:19,767 INFO L87 Difference]: Start difference. First operand 38 states and 47 transitions. Second operand has 8 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 19:49:19,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 19:49:19,974 INFO L93 Difference]: Finished difference Result 55 states and 66 transitions. [2024-10-12 19:49:19,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-12 19:49:19,974 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-10-12 19:49:19,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 19:49:19,976 INFO L225 Difference]: With dead ends: 55 [2024-10-12 19:49:19,976 INFO L226 Difference]: Without dead ends: 53 [2024-10-12 19:49:19,976 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-10-12 19:49:19,977 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 15 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-12 19:49:19,978 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 236 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-12 19:49:19,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-10-12 19:49:19,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 51. [2024-10-12 19:49:19,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 32 states have (on average 1.125) internal successors, (36), 35 states have internal predecessors, (36), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) [2024-10-12 19:49:19,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 62 transitions. [2024-10-12 19:49:19,992 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 62 transitions. Word has length 10 [2024-10-12 19:49:19,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 19:49:19,992 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 62 transitions. [2024-10-12 19:49:19,992 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 19:49:19,992 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 62 transitions. [2024-10-12 19:49:19,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-10-12 19:49:19,993 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 19:49:19,993 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 19:49:20,011 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-12 19:49:20,197 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 19:49:20,198 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 19:49:20,199 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 19:49:20,199 INFO L85 PathProgramCache]: Analyzing trace with hash -860720822, now seen corresponding path program 1 times [2024-10-12 19:49:20,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 19:49:20,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503003008] [2024-10-12 19:49:20,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 19:49:20,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 19:49:20,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-12 19:49:20,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1920826256] [2024-10-12 19:49:20,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 19:49:20,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 19:49:20,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 19:49:20,268 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 19:49:20,270 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-12 19:49:20,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:49:20,392 INFO L255 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-10-12 19:49:20,395 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 19:49:20,400 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-12 19:49:20,406 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-12 19:49:20,412 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-12 19:49:20,589 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-12 19:49:20,593 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-10-12 19:49:20,637 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 19:49:20,638 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 19:49:20,745 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 19:49:20,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 19:49:20,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503003008] [2024-10-12 19:49:20,746 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-12 19:49:20,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920826256] [2024-10-12 19:49:20,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920826256] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-12 19:49:20,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-12 19:49:20,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 9 [2024-10-12 19:49:20,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776970744] [2024-10-12 19:49:20,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 19:49:20,748 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-12 19:49:20,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 19:49:20,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-12 19:49:20,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-10-12 19:49:20,750 INFO L87 Difference]: Start difference. First operand 51 states and 62 transitions. Second operand has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-12 19:49:20,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 19:49:20,930 INFO L93 Difference]: Finished difference Result 60 states and 71 transitions. [2024-10-12 19:49:20,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-12 19:49:20,930 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2024-10-12 19:49:20,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 19:49:20,932 INFO L225 Difference]: With dead ends: 60 [2024-10-12 19:49:20,932 INFO L226 Difference]: Without dead ends: 58 [2024-10-12 19:49:20,933 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-10-12 19:49:20,936 INFO L432 NwaCegarLoop]: 40 mSDtfsCounter, 15 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-12 19:49:20,936 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 241 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-12 19:49:20,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2024-10-12 19:49:20,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 55. [2024-10-12 19:49:20,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 38 states have internal predecessors, (39), 13 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) [2024-10-12 19:49:20,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 65 transitions. [2024-10-12 19:49:20,967 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 65 transitions. Word has length 16 [2024-10-12 19:49:20,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 19:49:20,967 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 65 transitions. [2024-10-12 19:49:20,967 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-12 19:49:20,968 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 65 transitions. [2024-10-12 19:49:20,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-10-12 19:49:20,968 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 19:49:20,968 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 19:49:21,022 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-12 19:49:21,169 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2024-10-12 19:49:21,170 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 19:49:21,171 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 19:49:21,171 INFO L85 PathProgramCache]: Analyzing trace with hash 1771378809, now seen corresponding path program 1 times [2024-10-12 19:49:21,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 19:49:21,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089457593] [2024-10-12 19:49:21,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 19:49:21,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 19:49:21,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-12 19:49:21,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [959982230] [2024-10-12 19:49:21,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 19:49:21,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 19:49:21,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 19:49:21,238 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 19:49:21,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-12 19:49:21,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:49:21,366 INFO L255 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-10-12 19:49:21,370 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 19:49:21,374 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-12 19:49:21,382 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-12 19:49:21,386 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-12 19:49:21,446 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-12 19:49:21,451 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-10-12 19:49:21,484 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-12 19:49:21,484 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-12 19:49:21,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 19:49:21,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089457593] [2024-10-12 19:49:21,485 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-12 19:49:21,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959982230] [2024-10-12 19:49:21,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959982230] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 19:49:21,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-12 19:49:21,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-10-12 19:49:21,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915460083] [2024-10-12 19:49:21,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 19:49:21,486 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-12 19:49:21,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 19:49:21,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-12 19:49:21,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-10-12 19:49:21,487 INFO L87 Difference]: Start difference. First operand 55 states and 65 transitions. Second operand has 8 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-12 19:49:21,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 19:49:21,690 INFO L93 Difference]: Finished difference Result 76 states and 91 transitions. [2024-10-12 19:49:21,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-12 19:49:21,691 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 26 [2024-10-12 19:49:21,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 19:49:21,694 INFO L225 Difference]: With dead ends: 76 [2024-10-12 19:49:21,694 INFO L226 Difference]: Without dead ends: 74 [2024-10-12 19:49:21,695 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-10-12 19:49:21,696 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 19 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-12 19:49:21,696 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 213 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-12 19:49:21,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2024-10-12 19:49:21,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 70. [2024-10-12 19:49:21,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 45 states have (on average 1.1111111111111112) internal successors, (50), 48 states have internal predecessors, (50), 16 states have call successors, (16), 8 states have call predecessors, (16), 8 states have return successors, (17), 15 states have call predecessors, (17), 15 states have call successors, (17) [2024-10-12 19:49:21,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 83 transitions. [2024-10-12 19:49:21,719 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 83 transitions. Word has length 26 [2024-10-12 19:49:21,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 19:49:21,719 INFO L471 AbstractCegarLoop]: Abstraction has 70 states and 83 transitions. [2024-10-12 19:49:21,719 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-12 19:49:21,720 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 83 transitions. [2024-10-12 19:49:21,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-10-12 19:49:21,720 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 19:49:21,720 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 19:49:21,741 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-10-12 19:49:21,921 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 19:49:21,921 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 19:49:21,922 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 19:49:21,922 INFO L85 PathProgramCache]: Analyzing trace with hash 1321931825, now seen corresponding path program 1 times [2024-10-12 19:49:21,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 19:49:21,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626796250] [2024-10-12 19:49:21,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 19:49:21,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 19:49:21,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-12 19:49:21,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [570773741] [2024-10-12 19:49:21,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 19:49:21,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 19:49:21,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 19:49:21,981 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 19:49:21,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-12 19:49:22,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:49:22,107 INFO L255 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-10-12 19:49:22,112 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 19:49:22,119 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-12 19:49:22,120 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-12 19:49:22,125 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-12 19:49:22,129 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-12 19:49:22,148 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-12 19:49:22,288 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-12 19:49:22,292 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-10-12 19:49:22,298 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-10-12 19:49:22,323 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-12 19:49:22,324 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-12 19:49:22,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 19:49:22,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626796250] [2024-10-12 19:49:22,325 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-12 19:49:22,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570773741] [2024-10-12 19:49:22,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570773741] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 19:49:22,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-12 19:49:22,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-10-12 19:49:22,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024096533] [2024-10-12 19:49:22,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 19:49:22,327 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-12 19:49:22,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 19:49:22,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-12 19:49:22,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-10-12 19:49:22,331 INFO L87 Difference]: Start difference. First operand 70 states and 83 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-12 19:49:22,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 19:49:22,588 INFO L93 Difference]: Finished difference Result 80 states and 92 transitions. [2024-10-12 19:49:22,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-12 19:49:22,589 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2024-10-12 19:49:22,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 19:49:22,590 INFO L225 Difference]: With dead ends: 80 [2024-10-12 19:49:22,590 INFO L226 Difference]: Without dead ends: 70 [2024-10-12 19:49:22,590 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-10-12 19:49:22,591 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 26 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-12 19:49:22,591 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 51 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-12 19:49:22,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2024-10-12 19:49:22,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2024-10-12 19:49:22,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 45 states have (on average 1.0888888888888888) internal successors, (49), 47 states have internal predecessors, (49), 16 states have call successors, (16), 8 states have call predecessors, (16), 8 states have return successors, (17), 15 states have call predecessors, (17), 15 states have call successors, (17) [2024-10-12 19:49:22,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 82 transitions. [2024-10-12 19:49:22,605 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 82 transitions. Word has length 26 [2024-10-12 19:49:22,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 19:49:22,606 INFO L471 AbstractCegarLoop]: Abstraction has 70 states and 82 transitions. [2024-10-12 19:49:22,606 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-12 19:49:22,606 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 82 transitions. [2024-10-12 19:49:22,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-10-12 19:49:22,607 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 19:49:22,607 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 19:49:22,624 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-12 19:49:22,810 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 19:49:22,810 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 19:49:22,811 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 19:49:22,811 INFO L85 PathProgramCache]: Analyzing trace with hash 1358287025, now seen corresponding path program 1 times [2024-10-12 19:49:22,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 19:49:22,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393838002] [2024-10-12 19:49:22,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 19:49:22,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 19:49:22,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-12 19:49:22,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1883056778] [2024-10-12 19:49:22,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 19:49:22,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 19:49:22,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 19:49:22,870 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 19:49:22,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-12 19:49:22,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:49:22,987 INFO L255 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 69 conjuncts are in the unsatisfiable core [2024-10-12 19:49:22,990 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 19:49:22,993 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-12 19:49:22,997 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-12 19:49:23,000 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-12 19:49:23,244 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-12 19:49:23,247 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-10-12 19:49:23,286 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-12 19:49:23,286 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 19:49:23,405 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-12 19:49:23,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 19:49:23,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393838002] [2024-10-12 19:49:23,405 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-12 19:49:23,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883056778] [2024-10-12 19:49:23,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883056778] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-12 19:49:23,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-12 19:49:23,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [11] total 11 [2024-10-12 19:49:23,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432129658] [2024-10-12 19:49:23,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 19:49:23,406 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-12 19:49:23,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 19:49:23,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-12 19:49:23,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-10-12 19:49:23,407 INFO L87 Difference]: Start difference. First operand 70 states and 82 transitions. Second operand has 10 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-12 19:49:23,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 19:49:23,663 INFO L93 Difference]: Finished difference Result 103 states and 124 transitions. [2024-10-12 19:49:23,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-12 19:49:23,663 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 32 [2024-10-12 19:49:23,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 19:49:23,665 INFO L225 Difference]: With dead ends: 103 [2024-10-12 19:49:23,665 INFO L226 Difference]: Without dead ends: 101 [2024-10-12 19:49:23,665 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 45 SyntacticMatches, 8 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2024-10-12 19:49:23,666 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 24 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-12 19:49:23,666 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 231 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-12 19:49:23,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2024-10-12 19:49:23,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 100. [2024-10-12 19:49:23,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 63 states have (on average 1.0952380952380953) internal successors, (69), 67 states have internal predecessors, (69), 25 states have call successors, (25), 11 states have call predecessors, (25), 11 states have return successors, (27), 23 states have call predecessors, (27), 24 states have call successors, (27) [2024-10-12 19:49:23,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 121 transitions. [2024-10-12 19:49:23,681 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 121 transitions. Word has length 32 [2024-10-12 19:49:23,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 19:49:23,681 INFO L471 AbstractCegarLoop]: Abstraction has 100 states and 121 transitions. [2024-10-12 19:49:23,681 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-12 19:49:23,682 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 121 transitions. [2024-10-12 19:49:23,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-10-12 19:49:23,682 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 19:49:23,683 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 19:49:23,700 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-10-12 19:49:23,886 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 19:49:23,887 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 19:49:23,887 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 19:49:23,887 INFO L85 PathProgramCache]: Analyzing trace with hash 1087391719, now seen corresponding path program 1 times [2024-10-12 19:49:23,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 19:49:23,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862299375] [2024-10-12 19:49:23,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 19:49:23,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 19:49:23,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:49:24,781 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-12 19:49:24,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:49:24,788 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-10-12 19:49:24,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:49:24,797 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-10-12 19:49:24,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:49:24,802 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-10-12 19:49:24,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:49:24,808 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-10-12 19:49:24,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 19:49:24,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862299375] [2024-10-12 19:49:24,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862299375] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 19:49:24,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-12 19:49:24,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2024-10-12 19:49:24,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157474569] [2024-10-12 19:49:24,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 19:49:24,809 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-12 19:49:24,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 19:49:24,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-12 19:49:24,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2024-10-12 19:49:24,810 INFO L87 Difference]: Start difference. First operand 100 states and 121 transitions. Second operand has 15 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 12 states have internal predecessors, (18), 7 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2024-10-12 19:49:25,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 19:49:25,154 INFO L93 Difference]: Finished difference Result 106 states and 126 transitions. [2024-10-12 19:49:25,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-10-12 19:49:25,155 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 12 states have internal predecessors, (18), 7 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) Word has length 38 [2024-10-12 19:49:25,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 19:49:25,158 INFO L225 Difference]: With dead ends: 106 [2024-10-12 19:49:25,158 INFO L226 Difference]: Without dead ends: 104 [2024-10-12 19:49:25,158 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2024-10-12 19:49:25,160 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 31 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-12 19:49:25,160 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 205 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-12 19:49:25,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2024-10-12 19:49:25,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2024-10-12 19:49:25,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 66 states have (on average 1.0909090909090908) internal successors, (72), 70 states have internal predecessors, (72), 25 states have call successors, (25), 12 states have call predecessors, (25), 12 states have return successors, (27), 23 states have call predecessors, (27), 24 states have call successors, (27) [2024-10-12 19:49:25,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 124 transitions. [2024-10-12 19:49:25,180 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 124 transitions. Word has length 38 [2024-10-12 19:49:25,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 19:49:25,181 INFO L471 AbstractCegarLoop]: Abstraction has 104 states and 124 transitions. [2024-10-12 19:49:25,181 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 12 states have internal predecessors, (18), 7 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2024-10-12 19:49:25,181 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 124 transitions. [2024-10-12 19:49:25,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-10-12 19:49:25,182 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 19:49:25,182 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 19:49:25,182 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-10-12 19:49:25,182 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 19:49:25,182 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 19:49:25,182 INFO L85 PathProgramCache]: Analyzing trace with hash 1075242647, now seen corresponding path program 1 times [2024-10-12 19:49:25,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 19:49:25,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919682372] [2024-10-12 19:49:25,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 19:49:25,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 19:49:25,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-12 19:49:25,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [203561286] [2024-10-12 19:49:25,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 19:49:25,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 19:49:25,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 19:49:25,239 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 19:49:25,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-12 19:49:25,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:49:25,384 INFO L255 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 63 conjuncts are in the unsatisfiable core [2024-10-12 19:49:25,388 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 19:49:25,401 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-12 19:49:25,501 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-12 19:49:25,508 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-12 19:49:25,846 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-12 19:49:25,884 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2024-10-12 19:49:25,889 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2024-10-12 19:49:25,936 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 24 proven. 10 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-12 19:49:25,937 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 19:49:26,047 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2024-10-12 19:49:26,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 19:49:26,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919682372] [2024-10-12 19:49:26,090 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-12 19:49:26,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203561286] [2024-10-12 19:49:26,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203561286] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 19:49:26,090 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-12 19:49:26,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2024-10-12 19:49:26,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780880140] [2024-10-12 19:49:26,091 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-12 19:49:26,091 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-12 19:49:26,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 19:49:26,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-12 19:49:26,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2024-10-12 19:49:26,092 INFO L87 Difference]: Start difference. First operand 104 states and 124 transitions. Second operand has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 11 states have internal predecessors, (23), 5 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-12 19:49:30,116 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-12 19:49:30,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 19:49:30,849 INFO L93 Difference]: Finished difference Result 143 states and 167 transitions. [2024-10-12 19:49:30,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-10-12 19:49:30,850 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 11 states have internal predecessors, (23), 5 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 45 [2024-10-12 19:49:30,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 19:49:30,852 INFO L225 Difference]: With dead ends: 143 [2024-10-12 19:49:30,852 INFO L226 Difference]: Without dead ends: 141 [2024-10-12 19:49:30,852 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 25 SyntacticMatches, 10 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=120, Invalid=636, Unknown=0, NotChecked=0, Total=756 [2024-10-12 19:49:30,853 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 72 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 508 mSolverCounterSat, 27 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 508 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2024-10-12 19:49:30,853 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 201 Invalid, 536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 508 Invalid, 1 Unknown, 0 Unchecked, 4.5s Time] [2024-10-12 19:49:30,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2024-10-12 19:49:30,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 137. [2024-10-12 19:49:30,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 87 states have (on average 1.0919540229885059) internal successors, (95), 93 states have internal predecessors, (95), 31 states have call successors, (31), 17 states have call predecessors, (31), 18 states have return successors, (36), 28 states have call predecessors, (36), 29 states have call successors, (36) [2024-10-12 19:49:30,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 162 transitions. [2024-10-12 19:49:30,886 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 162 transitions. Word has length 45 [2024-10-12 19:49:30,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 19:49:30,887 INFO L471 AbstractCegarLoop]: Abstraction has 137 states and 162 transitions. [2024-10-12 19:49:30,887 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 11 states have internal predecessors, (23), 5 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-12 19:49:30,887 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 162 transitions. [2024-10-12 19:49:30,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-10-12 19:49:30,891 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 19:49:30,891 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 19:49:30,907 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-10-12 19:49:31,091 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 19:49:31,092 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 19:49:31,092 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 19:49:31,093 INFO L85 PathProgramCache]: Analyzing trace with hash 1953050054, now seen corresponding path program 1 times [2024-10-12 19:49:31,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 19:49:31,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757941296] [2024-10-12 19:49:31,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 19:49:31,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 19:49:31,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-12 19:49:31,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [427122774] [2024-10-12 19:49:31,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 19:49:31,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 19:49:31,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 19:49:31,141 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 19:49:31,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-12 19:49:31,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:49:31,287 INFO L255 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 87 conjuncts are in the unsatisfiable core [2024-10-12 19:49:31,292 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 19:49:31,295 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-12 19:49:31,299 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-12 19:49:31,365 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-12 19:49:31,369 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2024-10-12 19:49:31,390 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-12 19:49:31,646 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2024-10-12 19:49:31,727 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2024-10-12 19:49:31,731 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-10-12 19:49:31,796 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 11 proven. 32 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-12 19:49:31,796 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 19:49:32,047 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2024-10-12 19:49:32,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 19:49:32,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757941296] [2024-10-12 19:49:32,565 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-12 19:49:32,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427122774] [2024-10-12 19:49:32,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427122774] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 19:49:32,566 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-12 19:49:32,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2024-10-12 19:49:32,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190950245] [2024-10-12 19:49:32,566 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-12 19:49:32,567 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-12 19:49:32,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 19:49:32,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-12 19:49:32,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=671, Unknown=0, NotChecked=0, Total=756 [2024-10-12 19:49:32,569 INFO L87 Difference]: Start difference. First operand 137 states and 162 transitions. Second operand has 20 states, 16 states have (on average 1.875) internal successors, (30), 15 states have internal predecessors, (30), 7 states have call successors, (9), 6 states have call predecessors, (9), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2024-10-12 19:49:33,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 19:49:33,565 INFO L93 Difference]: Finished difference Result 154 states and 185 transitions. [2024-10-12 19:49:33,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-10-12 19:49:33,565 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 16 states have (on average 1.875) internal successors, (30), 15 states have internal predecessors, (30), 7 states have call successors, (9), 6 states have call predecessors, (9), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 51 [2024-10-12 19:49:33,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 19:49:33,567 INFO L225 Difference]: With dead ends: 154 [2024-10-12 19:49:33,567 INFO L226 Difference]: Without dead ends: 152 [2024-10-12 19:49:33,568 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=197, Invalid=1603, Unknown=6, NotChecked=0, Total=1806 [2024-10-12 19:49:33,568 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 50 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 771 mSolverCounterSat, 35 mSolverCounterUnsat, 16 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 771 IncrementalHoareTripleChecker+Invalid, 16 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-10-12 19:49:33,569 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 207 Invalid, 822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 771 Invalid, 16 Unknown, 0 Unchecked, 0.6s Time] [2024-10-12 19:49:33,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2024-10-12 19:49:33,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 150. [2024-10-12 19:49:33,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 94 states have (on average 1.0851063829787233) internal successors, (102), 101 states have internal predecessors, (102), 33 states have call successors, (33), 18 states have call predecessors, (33), 22 states have return successors, (45), 31 states have call predecessors, (45), 31 states have call successors, (45) [2024-10-12 19:49:33,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 180 transitions. [2024-10-12 19:49:33,592 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 180 transitions. Word has length 51 [2024-10-12 19:49:33,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 19:49:33,594 INFO L471 AbstractCegarLoop]: Abstraction has 150 states and 180 transitions. [2024-10-12 19:49:33,594 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 16 states have (on average 1.875) internal successors, (30), 15 states have internal predecessors, (30), 7 states have call successors, (9), 6 states have call predecessors, (9), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2024-10-12 19:49:33,594 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 180 transitions. [2024-10-12 19:49:33,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-10-12 19:49:33,595 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 19:49:33,595 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 19:49:33,614 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-12 19:49:33,795 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 19:49:33,796 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 19:49:33,796 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 19:49:33,796 INFO L85 PathProgramCache]: Analyzing trace with hash -1796395648, now seen corresponding path program 1 times [2024-10-12 19:49:33,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 19:49:33,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333581697] [2024-10-12 19:49:33,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 19:49:33,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 19:49:33,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-12 19:49:33,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1499794918] [2024-10-12 19:49:33,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 19:49:33,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 19:49:33,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 19:49:33,840 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 19:49:33,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-12 19:49:34,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:49:34,006 INFO L255 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 89 conjuncts are in the unsatisfiable core [2024-10-12 19:49:34,011 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 19:49:34,017 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-12 19:49:34,022 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-12 19:49:34,027 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-12 19:49:34,266 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2024-10-12 19:49:34,272 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-12 19:49:34,318 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2024-10-12 19:49:34,321 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-10-12 19:49:34,371 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 36 proven. 11 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-10-12 19:49:34,371 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 19:49:34,529 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2024-10-12 19:49:34,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 19:49:34,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333581697] [2024-10-12 19:49:34,529 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-12 19:49:34,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499794918] [2024-10-12 19:49:34,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499794918] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 19:49:34,530 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-12 19:49:34,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 15 [2024-10-12 19:49:34,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864093486] [2024-10-12 19:49:34,530 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-12 19:49:34,530 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-12 19:49:34,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 19:49:34,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-12 19:49:34,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2024-10-12 19:49:34,531 INFO L87 Difference]: Start difference. First operand 150 states and 180 transitions. Second operand has 15 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 8 states have call successors, (17), 6 states have call predecessors, (17), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2024-10-12 19:49:35,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 19:49:35,109 INFO L93 Difference]: Finished difference Result 196 states and 239 transitions. [2024-10-12 19:49:35,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-10-12 19:49:35,110 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 8 states have call successors, (17), 6 states have call predecessors, (17), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 54 [2024-10-12 19:49:35,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 19:49:35,112 INFO L225 Difference]: With dead ends: 196 [2024-10-12 19:49:35,112 INFO L226 Difference]: Without dead ends: 194 [2024-10-12 19:49:35,113 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 84 SyntacticMatches, 9 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2024-10-12 19:49:35,114 INFO L432 NwaCegarLoop]: 47 mSDtfsCounter, 70 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 432 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-12 19:49:35,115 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 308 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 432 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-12 19:49:35,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2024-10-12 19:49:35,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 188. [2024-10-12 19:49:35,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 117 states have (on average 1.0854700854700854) internal successors, (127), 124 states have internal predecessors, (127), 41 states have call successors, (41), 21 states have call predecessors, (41), 29 states have return successors, (62), 43 states have call predecessors, (62), 39 states have call successors, (62) [2024-10-12 19:49:35,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 230 transitions. [2024-10-12 19:49:35,165 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 230 transitions. Word has length 54 [2024-10-12 19:49:35,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 19:49:35,165 INFO L471 AbstractCegarLoop]: Abstraction has 188 states and 230 transitions. [2024-10-12 19:49:35,165 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 8 states have call successors, (17), 6 states have call predecessors, (17), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2024-10-12 19:49:35,165 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 230 transitions. [2024-10-12 19:49:35,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-10-12 19:49:35,167 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 19:49:35,167 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 19:49:35,187 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-10-12 19:49:35,368 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-10-12 19:49:35,369 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 19:49:35,369 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 19:49:35,369 INFO L85 PathProgramCache]: Analyzing trace with hash -1439706693, now seen corresponding path program 2 times [2024-10-12 19:49:35,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 19:49:35,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895285176] [2024-10-12 19:49:35,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 19:49:35,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 19:49:35,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-12 19:49:35,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1275292083] [2024-10-12 19:49:35,407 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-12 19:49:35,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 19:49:35,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 19:49:35,409 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 19:49:35,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-12 19:49:35,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-12 19:49:35,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 19:49:35,592 INFO L255 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 169 conjuncts are in the unsatisfiable core [2024-10-12 19:49:35,598 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 19:49:35,604 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-12 19:49:35,608 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2024-10-12 19:49:35,611 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-12 19:49:35,615 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-12 19:49:35,621 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-12 19:49:35,758 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-12 19:49:35,771 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-12 19:49:35,802 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-12 19:49:56,449 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 38 [2024-10-12 19:49:56,493 INFO L349 Elim1Store]: treesize reduction 22, result has 56.0 percent of original size [2024-10-12 19:49:56,494 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 83 treesize of output 80 [2024-10-12 19:49:56,590 INFO L349 Elim1Store]: treesize reduction 29, result has 34.1 percent of original size [2024-10-12 19:49:56,591 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 29 [2024-10-12 19:49:57,864 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-12 19:49:57,865 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 103 treesize of output 123 [2024-10-12 19:49:57,919 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-12 19:49:57,920 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 117 treesize of output 161 [2024-10-12 19:49:57,982 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-12 19:49:57,983 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 93 treesize of output 121 [2024-10-12 19:49:58,273 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 30 proven. 37 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-12 19:49:58,273 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 19:50:11,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 19:50:11,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895285176] [2024-10-12 19:50:11,637 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-12 19:50:11,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275292083] [2024-10-12 19:50:11,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275292083] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 19:50:11,637 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-12 19:50:11,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2024-10-12 19:50:11,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828519406] [2024-10-12 19:50:11,638 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-12 19:50:11,638 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-10-12 19:50:11,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 19:50:11,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-10-12 19:50:11,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=872, Unknown=6, NotChecked=0, Total=992 [2024-10-12 19:50:11,640 INFO L87 Difference]: Start difference. First operand 188 states and 230 transitions. Second operand has 22 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 17 states have internal predecessors, (34), 6 states have call successors, (10), 7 states have call predecessors, (10), 5 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2024-10-12 19:50:15,728 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-12 19:50:19,740 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-12 19:50:23,766 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-12 19:50:31,881 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-12 19:50:35,885 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-12 19:50:39,914 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-12 19:50:43,917 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-12 19:50:47,965 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-10-12 19:50:51,977 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0]