./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_cohencu-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_cohencu-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 260777f6a7be1f16cc330a008300c11ebdea8f1cf9d8e96a0325274fd8fd5b2a --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-mul-div-a046e57-m [2024-10-12 19:49:01,708 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-12 19:49:01,773 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-12 19:49:01,778 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-12 19:49:01,780 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-12 19:49:01,807 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-12 19:49:01,808 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-12 19:49:01,808 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-12 19:49:01,809 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-12 19:49:01,809 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-12 19:49:01,810 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-12 19:49:01,810 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-12 19:49:01,811 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-12 19:49:01,813 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-12 19:49:01,813 INFO L153 SettingsManager]: * Use SBE=true [2024-10-12 19:49:01,814 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-12 19:49:01,814 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-12 19:49:01,814 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-12 19:49:01,814 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-12 19:49:01,815 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-12 19:49:01,815 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-12 19:49:01,819 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-12 19:49:01,820 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-12 19:49:01,820 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-12 19:49:01,820 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-12 19:49:01,820 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-12 19:49:01,820 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-12 19:49:01,821 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-12 19:49:01,821 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-12 19:49:01,830 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-12 19:49:01,831 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-12 19:49:01,831 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-12 19:49:01,832 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-12 19:49:01,832 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-12 19:49:01,832 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-12 19:49:01,832 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-12 19:49:01,833 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-12 19:49:01,833 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-12 19:49:01,833 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-12 19:49:01,834 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-12 19:49:01,834 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-12 19:49:01,834 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-12 19:49:01,834 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 260777f6a7be1f16cc330a008300c11ebdea8f1cf9d8e96a0325274fd8fd5b2a [2024-10-12 19:49:02,156 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-12 19:49:02,183 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-12 19:49:02,186 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-12 19:49:02,187 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-12 19:49:02,188 INFO L274 PluginConnector]: CDTParser initialized [2024-10-12 19:49:02,189 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursified_nla-digbench/recursified_cohencu-ll.c [2024-10-12 19:49:03,643 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-12 19:49:03,862 INFO L384 CDTParser]: Found 1 translation units. [2024-10-12 19:49:03,863 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursified_nla-digbench/recursified_cohencu-ll.c [2024-10-12 19:49:03,874 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2ec010a8e/bf5fd8cd9c094b5ab071140c2830e39d/FLAG3b4806509 [2024-10-12 19:49:03,890 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2ec010a8e/bf5fd8cd9c094b5ab071140c2830e39d [2024-10-12 19:49:03,893 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-12 19:49:03,895 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-12 19:49:03,897 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-12 19:49:03,898 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-12 19:49:03,903 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-12 19:49:03,904 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 07:49:03" (1/1) ... [2024-10-12 19:49:03,904 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31c7fc7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:49:03, skipping insertion in model container [2024-10-12 19:49:03,904 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 07:49:03" (1/1) ... [2024-10-12 19:49:03,930 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-12 19:49:04,112 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_cohencu-ll.c[1124,1137] [2024-10-12 19:49:04,140 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-12 19:49:04,151 INFO L200 MainTranslator]: Completed pre-run [2024-10-12 19:49:04,162 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_cohencu-ll.c[1124,1137] [2024-10-12 19:49:04,180 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-12 19:49:04,198 INFO L204 MainTranslator]: Completed translation [2024-10-12 19:49:04,198 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:49:04 WrapperNode [2024-10-12 19:49:04,198 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-12 19:49:04,199 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-12 19:49:04,199 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-12 19:49:04,199 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-12 19:49:04,207 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:49:04" (1/1) ... [2024-10-12 19:49:04,215 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:49:04" (1/1) ... [2024-10-12 19:49:04,238 INFO L138 Inliner]: procedures = 16, calls = 99, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 106 [2024-10-12 19:49:04,239 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-12 19:49:04,240 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-12 19:49:04,240 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-12 19:49:04,240 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-12 19:49:04,250 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:49:04" (1/1) ... [2024-10-12 19:49:04,250 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:49:04" (1/1) ... [2024-10-12 19:49:04,253 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:49:04" (1/1) ... [2024-10-12 19:49:04,269 INFO L175 MemorySlicer]: Split 66 memory accesses to 6 slices as follows [2, 21, 11, 15, 12, 5]. 32 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0, 0]. The 9 writes are split as follows [0, 2, 2, 2, 2, 1]. [2024-10-12 19:49:04,270 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:49:04" (1/1) ... [2024-10-12 19:49:04,270 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:49:04" (1/1) ... [2024-10-12 19:49:04,277 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:49:04" (1/1) ... [2024-10-12 19:49:04,279 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:49:04" (1/1) ... [2024-10-12 19:49:04,281 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:49:04" (1/1) ... [2024-10-12 19:49:04,282 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:49:04" (1/1) ... [2024-10-12 19:49:04,285 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-12 19:49:04,286 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-12 19:49:04,286 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-12 19:49:04,286 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-12 19:49:04,287 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:49:04" (1/1) ... [2024-10-12 19:49:04,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-12 19:49:04,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 19:49:04,320 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 19:49:04,322 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 19:49:04,361 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-12 19:49:04,361 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-12 19:49:04,361 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-12 19:49:04,361 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-12 19:49:04,361 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-10-12 19:49:04,361 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-10-12 19:49:04,361 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-10-12 19:49:04,361 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-12 19:49:04,362 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-12 19:49:04,362 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-12 19:49:04,362 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-12 19:49:04,362 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-10-12 19:49:04,362 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-10-12 19:49:04,362 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-10-12 19:49:04,362 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_29_to_41_0 [2024-10-12 19:49:04,362 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_29_to_41_0 [2024-10-12 19:49:04,362 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-12 19:49:04,363 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-12 19:49:04,363 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-12 19:49:04,363 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-12 19:49:04,363 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-12 19:49:04,363 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-10-12 19:49:04,363 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-10-12 19:49:04,363 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-10-12 19:49:04,363 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-10-12 19:49:04,363 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-10-12 19:49:04,363 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-12 19:49:04,464 INFO L238 CfgBuilder]: Building ICFG [2024-10-12 19:49:04,466 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-12 19:49:04,735 INFO L? ?]: Removed 9 outVars from TransFormulas that were not future-live. [2024-10-12 19:49:04,735 INFO L287 CfgBuilder]: Performing block encoding [2024-10-12 19:49:04,780 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-12 19:49:04,780 INFO L314 CfgBuilder]: Removed 1 assume(true) statements. [2024-10-12 19:49:04,783 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 07:49:04 BoogieIcfgContainer [2024-10-12 19:49:04,783 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-12 19:49:04,785 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-12 19:49:04,787 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-12 19:49:04,790 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-12 19:49:04,791 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 07:49:03" (1/3) ... [2024-10-12 19:49:04,791 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7878d4e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 07:49:04, skipping insertion in model container [2024-10-12 19:49:04,792 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:49:04" (2/3) ... [2024-10-12 19:49:04,792 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7878d4e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 07:49:04, skipping insertion in model container [2024-10-12 19:49:04,794 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 07:49:04" (3/3) ... [2024-10-12 19:49:04,795 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_cohencu-ll.c [2024-10-12 19:49:04,814 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-12 19:49:04,814 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-12 19:49:04,877 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-12 19:49:04,884 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;@23384902, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-12 19:49:04,884 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-12 19:49:04,890 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 23 states have internal predecessors, (25), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-10-12 19:49:04,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-10-12 19:49:04,897 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 19:49:04,897 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 19:49:04,898 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 19:49:04,903 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 19:49:04,903 INFO L85 PathProgramCache]: Analyzing trace with hash -1371458259, now seen corresponding path program 1 times [2024-10-12 19:49:04,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 19:49:04,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108807540] [2024-10-12 19:49:04,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 19:49:04,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 19:49:05,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:49:05,792 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 19:49:05,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 19:49:05,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108807540] [2024-10-12 19:49:05,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108807540] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 19:49:05,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-12 19:49:05,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-10-12 19:49:05,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780398005] [2024-10-12 19:49:05,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 19:49:05,804 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-12 19:49:05,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 19:49:05,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-12 19:49:05,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-10-12 19:49:05,835 INFO L87 Difference]: Start difference. First operand has 38 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 23 states have internal predecessors, (25), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 8 states, 6 states have (on average 1.0) internal successors, (6), 5 states have internal predecessors, (6), 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 19:49:06,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 19:49:06,187 INFO L93 Difference]: Finished difference Result 94 states and 144 transitions. [2024-10-12 19:49:06,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-12 19:49:06,190 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.0) internal successors, (6), 5 states have internal predecessors, (6), 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 8 [2024-10-12 19:49:06,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 19:49:06,198 INFO L225 Difference]: With dead ends: 94 [2024-10-12 19:49:06,199 INFO L226 Difference]: Without dead ends: 56 [2024-10-12 19:49:06,204 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 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 19:49:06,210 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 20 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-12 19:49:06,212 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 192 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-12 19:49:06,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-10-12 19:49:06,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2024-10-12 19:49:06,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 32 states have (on average 1.09375) internal successors, (35), 34 states have internal predecessors, (35), 18 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (18), 17 states have call predecessors, (18), 17 states have call successors, (18) [2024-10-12 19:49:06,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 71 transitions. [2024-10-12 19:49:06,274 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 71 transitions. Word has length 8 [2024-10-12 19:49:06,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 19:49:06,276 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 71 transitions. [2024-10-12 19:49:06,276 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.0) internal successors, (6), 5 states have internal predecessors, (6), 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 19:49:06,276 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 71 transitions. [2024-10-12 19:49:06,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-10-12 19:49:06,279 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 19:49:06,279 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 19:49:06,279 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-12 19:49:06,280 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 19:49:06,281 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 19:49:06,281 INFO L85 PathProgramCache]: Analyzing trace with hash -1638005840, now seen corresponding path program 1 times [2024-10-12 19:49:06,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 19:49:06,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37368957] [2024-10-12 19:49:06,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 19:49:06,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 19:49:06,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-12 19:49:06,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [877129521] [2024-10-12 19:49:06,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 19:49:06,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 19:49:06,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 19:49:06,322 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 19:49:06,325 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 19:49:06,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:49:06,424 INFO L255 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-10-12 19:49:06,436 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 19:49:06,486 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 19:49:06,494 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 19:49:06,751 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 19:49:06,753 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 19:49:06,926 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 19:49:06,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 19:49:06,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37368957] [2024-10-12 19:49:06,927 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-12 19:49:06,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877129521] [2024-10-12 19:49:06,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877129521] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-12 19:49:06,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-12 19:49:06,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 10 [2024-10-12 19:49:06,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160669528] [2024-10-12 19:49:06,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 19:49:06,930 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-12 19:49:06,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 19:49:06,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-12 19:49:06,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-10-12 19:49:06,933 INFO L87 Difference]: Start difference. First operand 55 states and 71 transitions. Second operand has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 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 19:49:07,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 19:49:07,482 INFO L93 Difference]: Finished difference Result 62 states and 77 transitions. [2024-10-12 19:49:07,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-12 19:49:07,483 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 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 14 [2024-10-12 19:49:07,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 19:49:07,484 INFO L225 Difference]: With dead ends: 62 [2024-10-12 19:49:07,486 INFO L226 Difference]: Without dead ends: 60 [2024-10-12 19:49:07,487 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2024-10-12 19:49:07,488 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 19 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-12 19:49:07,489 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 204 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-12 19:49:07,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-10-12 19:49:07,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2024-10-12 19:49:07,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 37 states have internal predecessors, (38), 18 states have call successors, (18), 5 states have call predecessors, (18), 5 states have return successors, (18), 17 states have call predecessors, (18), 17 states have call successors, (18) [2024-10-12 19:49:07,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 74 transitions. [2024-10-12 19:49:07,509 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 74 transitions. Word has length 14 [2024-10-12 19:49:07,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 19:49:07,510 INFO L471 AbstractCegarLoop]: Abstraction has 59 states and 74 transitions. [2024-10-12 19:49:07,510 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 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 19:49:07,510 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 74 transitions. [2024-10-12 19:49:07,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-10-12 19:49:07,511 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 19:49:07,511 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 19:49:07,526 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 19:49:07,711 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 19:49:07,712 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 19:49:07,712 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 19:49:07,712 INFO L85 PathProgramCache]: Analyzing trace with hash 1652518129, now seen corresponding path program 1 times [2024-10-12 19:49:07,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 19:49:07,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500280351] [2024-10-12 19:49:07,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 19:49:07,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 19:49:07,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-12 19:49:07,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [716507731] [2024-10-12 19:49:07,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 19:49:07,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 19:49:07,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 19:49:07,756 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 19:49:07,759 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 19:49:07,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:49:07,856 INFO L255 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-10-12 19:49:07,859 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 19:49:07,864 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 19:49:07,869 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 19:49:08,203 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 19:49:08,203 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 19:49:08,439 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 32 treesize of output 24 [2024-10-12 19:49:08,566 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-12 19:49:08,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 19:49:08,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500280351] [2024-10-12 19:49:08,567 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-12 19:49:08,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716507731] [2024-10-12 19:49:08,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716507731] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 19:49:08,568 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-12 19:49:08,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2024-10-12 19:49:08,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297569467] [2024-10-12 19:49:08,569 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-12 19:49:08,569 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-12 19:49:08,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 19:49:08,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-12 19:49:08,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2024-10-12 19:49:08,572 INFO L87 Difference]: Start difference. First operand 59 states and 74 transitions. Second operand has 21 states, 16 states have (on average 1.5625) internal successors, (25), 17 states have internal predecessors, (25), 7 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2024-10-12 19:49:09,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 19:49:09,467 INFO L93 Difference]: Finished difference Result 83 states and 101 transitions. [2024-10-12 19:49:09,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-12 19:49:09,467 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 16 states have (on average 1.5625) internal successors, (25), 17 states have internal predecessors, (25), 7 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) Word has length 20 [2024-10-12 19:49:09,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 19:49:09,469 INFO L225 Difference]: With dead ends: 83 [2024-10-12 19:49:09,469 INFO L226 Difference]: Without dead ends: 81 [2024-10-12 19:49:09,470 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=176, Invalid=816, Unknown=0, NotChecked=0, Total=992 [2024-10-12 19:49:09,471 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 60 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 506 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-12 19:49:09,471 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 184 Invalid, 555 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 506 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-12 19:49:09,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2024-10-12 19:49:09,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 79. [2024-10-12 19:49:09,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 47 states have (on average 1.0851063829787233) internal successors, (51), 49 states have internal predecessors, (51), 24 states have call successors, (24), 7 states have call predecessors, (24), 7 states have return successors, (23), 23 states have call predecessors, (23), 22 states have call successors, (23) [2024-10-12 19:49:09,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 98 transitions. [2024-10-12 19:49:09,497 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 98 transitions. Word has length 20 [2024-10-12 19:49:09,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 19:49:09,497 INFO L471 AbstractCegarLoop]: Abstraction has 79 states and 98 transitions. [2024-10-12 19:49:09,498 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 16 states have (on average 1.5625) internal successors, (25), 17 states have internal predecessors, (25), 7 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2024-10-12 19:49:09,498 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 98 transitions. [2024-10-12 19:49:09,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-10-12 19:49:09,498 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 19:49:09,498 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 19:49:09,517 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-10-12 19:49:09,702 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 19:49:09,704 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 19:49:09,704 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 19:49:09,704 INFO L85 PathProgramCache]: Analyzing trace with hash -1440093584, now seen corresponding path program 1 times [2024-10-12 19:49:09,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 19:49:09,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561822273] [2024-10-12 19:49:09,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 19:49:09,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 19:49:09,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-12 19:49:09,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [408035252] [2024-10-12 19:49:09,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 19:49:09,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 19:49:09,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 19:49:09,737 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 19:49:09,738 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 19:49:09,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:49:09,836 INFO L255 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 62 conjuncts are in the unsatisfiable core [2024-10-12 19:49:09,840 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 19:49:09,849 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 19:49:09,854 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 19:49:09,862 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 19:49:10,397 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-12 19:49:10,398 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 19:49:10,744 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 53 treesize of output 41 [2024-10-12 19:49:10,870 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-12 19:49:10,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 19:49:10,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561822273] [2024-10-12 19:49:10,871 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-12 19:49:10,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408035252] [2024-10-12 19:49:10,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408035252] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 19:49:10,872 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-12 19:49:10,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2024-10-12 19:49:10,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596822472] [2024-10-12 19:49:10,872 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-12 19:49:10,872 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-10-12 19:49:10,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 19:49:10,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-10-12 19:49:10,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2024-10-12 19:49:10,874 INFO L87 Difference]: Start difference. First operand 79 states and 98 transitions. Second operand has 22 states, 16 states have (on average 1.6875) internal successors, (27), 18 states have internal predecessors, (27), 8 states have call successors, (10), 6 states have call predecessors, (10), 4 states have return successors, (6), 2 states have call predecessors, (6), 4 states have call successors, (6) [2024-10-12 19:49:18,636 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 [1] [2024-10-12 19:49:20,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 19:49:20,337 INFO L93 Difference]: Finished difference Result 109 states and 133 transitions. [2024-10-12 19:49:20,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-10-12 19:49:20,338 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 16 states have (on average 1.6875) internal successors, (27), 18 states have internal predecessors, (27), 8 states have call successors, (10), 6 states have call predecessors, (10), 4 states have return successors, (6), 2 states have call predecessors, (6), 4 states have call successors, (6) Word has length 26 [2024-10-12 19:49:20,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 19:49:20,341 INFO L225 Difference]: With dead ends: 109 [2024-10-12 19:49:20,341 INFO L226 Difference]: Without dead ends: 107 [2024-10-12 19:49:20,342 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=235, Invalid=1247, Unknown=0, NotChecked=0, Total=1482 [2024-10-12 19:49:20,343 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 77 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 778 mSolverCounterSat, 44 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 824 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 778 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.3s IncrementalHoareTripleChecker+Time [2024-10-12 19:49:20,343 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 177 Invalid, 824 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 778 Invalid, 2 Unknown, 0 Unchecked, 8.3s Time] [2024-10-12 19:49:20,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2024-10-12 19:49:20,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 105. [2024-10-12 19:49:20,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 63 states have (on average 1.0793650793650793) internal successors, (68), 66 states have internal predecessors, (68), 30 states have call successors, (30), 10 states have call predecessors, (30), 11 states have return successors, (31), 29 states have call predecessors, (31), 28 states have call successors, (31) [2024-10-12 19:49:20,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 129 transitions. [2024-10-12 19:49:20,374 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 129 transitions. Word has length 26 [2024-10-12 19:49:20,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 19:49:20,374 INFO L471 AbstractCegarLoop]: Abstraction has 105 states and 129 transitions. [2024-10-12 19:49:20,374 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 16 states have (on average 1.6875) internal successors, (27), 18 states have internal predecessors, (27), 8 states have call successors, (10), 6 states have call predecessors, (10), 4 states have return successors, (6), 2 states have call predecessors, (6), 4 states have call successors, (6) [2024-10-12 19:49:20,375 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 129 transitions. [2024-10-12 19:49:20,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-10-12 19:49:20,375 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 19:49:20,376 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] [2024-10-12 19:49:20,391 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-12 19:49:20,579 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 19:49:20,580 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 19:49:20,580 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 19:49:20,580 INFO L85 PathProgramCache]: Analyzing trace with hash -1224682067, now seen corresponding path program 1 times [2024-10-12 19:49:20,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 19:49:20,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582406102] [2024-10-12 19:49:20,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 19:49:20,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 19:49:20,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-12 19:49:20,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [817619940] [2024-10-12 19:49:20,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 19:49:20,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 19:49:20,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 19:49:20,608 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 19:49:20,609 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 19:49:20,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:49:20,715 INFO L255 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-10-12 19:49:20,718 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 19:49:20,731 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 19:49:20,745 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 19:49:21,493 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-10-12 19:49:21,493 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 19:49:21,996 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 19:49:21,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 19:49:21,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582406102] [2024-10-12 19:49:21,996 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-12 19:49:21,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817619940] [2024-10-12 19:49:21,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817619940] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-12 19:49:21,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-12 19:49:21,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2024-10-12 19:49:21,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777031759] [2024-10-12 19:49:21,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 19:49:21,997 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-12 19:49:21,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 19:49:21,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-12 19:49:21,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-10-12 19:49:21,998 INFO L87 Difference]: Start difference. First operand 105 states and 129 transitions. Second operand has 8 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-10-12 19:49:22,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 19:49:22,834 INFO L93 Difference]: Finished difference Result 119 states and 143 transitions. [2024-10-12 19:49:22,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-12 19:49:22,835 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 32 [2024-10-12 19:49:22,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 19:49:22,836 INFO L225 Difference]: With dead ends: 119 [2024-10-12 19:49:22,836 INFO L226 Difference]: Without dead ends: 117 [2024-10-12 19:49:22,837 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 42 SyntacticMatches, 9 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2024-10-12 19:49:22,838 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 22 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-10-12 19:49:22,842 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 143 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-10-12 19:49:22,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2024-10-12 19:49:22,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2024-10-12 19:49:22,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 71 states have (on average 1.0704225352112675) internal successors, (76), 74 states have internal predecessors, (76), 30 states have call successors, (30), 12 states have call predecessors, (30), 15 states have return successors, (34), 30 states have call predecessors, (34), 28 states have call successors, (34) [2024-10-12 19:49:22,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 140 transitions. [2024-10-12 19:49:22,880 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 140 transitions. Word has length 32 [2024-10-12 19:49:22,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 19:49:22,880 INFO L471 AbstractCegarLoop]: Abstraction has 117 states and 140 transitions. [2024-10-12 19:49:22,880 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-10-12 19:49:22,881 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 140 transitions. [2024-10-12 19:49:22,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-10-12 19:49:22,881 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 19:49:22,882 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] [2024-10-12 19:49:22,901 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 19:49:23,086 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 19:49:23,087 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 19:49:23,087 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 19:49:23,087 INFO L85 PathProgramCache]: Analyzing trace with hash -1299588988, now seen corresponding path program 1 times [2024-10-12 19:49:23,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 19:49:23,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562414006] [2024-10-12 19:49:23,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 19:49:23,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 19:49:23,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:49:23,998 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-10-12 19:49:24,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:49:24,003 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-12 19:49:24,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:49:24,009 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-12 19:49:24,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:49:24,013 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-10-12 19:49:24,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:49:24,016 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-10-12 19:49:24,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:49:24,020 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-10-12 19:49:24,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 19:49:24,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562414006] [2024-10-12 19:49:24,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562414006] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 19:49:24,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362153328] [2024-10-12 19:49:24,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 19:49:24,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 19:49:24,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 19:49:24,023 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 19:49:24,024 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 19:49:24,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:49:24,136 INFO L255 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-10-12 19:49:24,139 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 19:49:24,149 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 19:49:24,165 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 19:49:24,886 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 19:49:24,899 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 19:49:25,004 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-10-12 19:49:25,004 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 19:49:25,366 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-10-12 19:49:25,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362153328] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 19:49:25,367 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 19:49:25,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 17 [2024-10-12 19:49:25,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259170601] [2024-10-12 19:49:25,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 19:49:25,367 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-12 19:49:25,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 19:49:25,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-12 19:49:25,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2024-10-12 19:49:25,369 INFO L87 Difference]: Start difference. First operand 117 states and 140 transitions. Second operand has 17 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 12 states have internal predecessors, (32), 7 states have call successors, (22), 7 states have call predecessors, (22), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-10-12 19:49:26,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 19:49:26,861 INFO L93 Difference]: Finished difference Result 125 states and 146 transitions. [2024-10-12 19:49:26,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-10-12 19:49:26,861 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 12 states have internal predecessors, (32), 7 states have call successors, (22), 7 states have call predecessors, (22), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 42 [2024-10-12 19:49:26,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 19:49:26,863 INFO L225 Difference]: With dead ends: 125 [2024-10-12 19:49:26,863 INFO L226 Difference]: Without dead ends: 123 [2024-10-12 19:49:26,863 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 76 SyntacticMatches, 11 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=109, Invalid=541, Unknown=0, NotChecked=0, Total=650 [2024-10-12 19:49:26,864 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 77 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 475 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-10-12 19:49:26,864 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 189 Invalid, 509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 475 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-10-12 19:49:26,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2024-10-12 19:49:26,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 121. [2024-10-12 19:49:26,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 74 states have (on average 1.0675675675675675) internal successors, (79), 77 states have internal predecessors, (79), 30 states have call successors, (30), 13 states have call predecessors, (30), 16 states have return successors, (34), 30 states have call predecessors, (34), 28 states have call successors, (34) [2024-10-12 19:49:26,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 143 transitions. [2024-10-12 19:49:26,914 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 143 transitions. Word has length 42 [2024-10-12 19:49:26,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 19:49:26,915 INFO L471 AbstractCegarLoop]: Abstraction has 121 states and 143 transitions. [2024-10-12 19:49:26,915 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 12 states have internal predecessors, (32), 7 states have call successors, (22), 7 states have call predecessors, (22), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-10-12 19:49:26,915 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 143 transitions. [2024-10-12 19:49:26,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-10-12 19:49:26,916 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 19:49:26,916 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] [2024-10-12 19:49:26,933 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 19:49:27,120 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 19:49:27,121 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 19:49:27,122 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 19:49:27,122 INFO L85 PathProgramCache]: Analyzing trace with hash 277886434, now seen corresponding path program 1 times [2024-10-12 19:49:27,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 19:49:27,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859302560] [2024-10-12 19:49:27,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 19:49:27,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 19:49:27,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:49:27,442 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-12 19:49:27,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:49:27,556 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-12 19:49:27,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:49:27,560 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-12 19:49:27,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:49:27,563 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-10-12 19:49:27,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:49:27,566 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-10-12 19:49:27,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:49:27,570 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-10-12 19:49:27,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:49:27,573 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-10-12 19:49:27,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 19:49:27,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859302560] [2024-10-12 19:49:27,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859302560] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 19:49:27,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-12 19:49:27,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-10-12 19:49:27,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829808862] [2024-10-12 19:49:27,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 19:49:27,574 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-12 19:49:27,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 19:49:27,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-12 19:49:27,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-10-12 19:49:27,575 INFO L87 Difference]: Start difference. First operand 121 states and 143 transitions. Second operand has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-12 19:49:28,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 19:49:28,154 INFO L93 Difference]: Finished difference Result 127 states and 148 transitions. [2024-10-12 19:49:28,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-12 19:49:28,155 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 42 [2024-10-12 19:49:28,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 19:49:28,157 INFO L225 Difference]: With dead ends: 127 [2024-10-12 19:49:28,157 INFO L226 Difference]: Without dead ends: 125 [2024-10-12 19:49:28,157 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-10-12 19:49:28,158 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 17 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-12 19:49:28,158 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 92 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-12 19:49:28,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2024-10-12 19:49:28,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2024-10-12 19:49:28,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 77 states have (on average 1.0649350649350648) internal successors, (82), 80 states have internal predecessors, (82), 30 states have call successors, (30), 14 states have call predecessors, (30), 17 states have return successors, (34), 30 states have call predecessors, (34), 28 states have call successors, (34) [2024-10-12 19:49:28,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 146 transitions. [2024-10-12 19:49:28,202 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 146 transitions. Word has length 42 [2024-10-12 19:49:28,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 19:49:28,203 INFO L471 AbstractCegarLoop]: Abstraction has 125 states and 146 transitions. [2024-10-12 19:49:28,203 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-12 19:49:28,203 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 146 transitions. [2024-10-12 19:49:28,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-10-12 19:49:28,205 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 19:49:28,206 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] [2024-10-12 19:49:28,206 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-10-12 19:49:28,206 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 19:49:28,206 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 19:49:28,206 INFO L85 PathProgramCache]: Analyzing trace with hash -560035385, now seen corresponding path program 2 times [2024-10-12 19:49:28,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 19:49:28,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399436900] [2024-10-12 19:49:28,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 19:49:28,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 19:49:28,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-12 19:49:28,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [833871001] [2024-10-12 19:49:28,242 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-12 19:49:28,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 19:49:28,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 19:49:28,244 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 19:49:28,248 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 19:49:28,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-12 19:49:28,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 19:49:28,384 INFO L255 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 86 conjuncts are in the unsatisfiable core [2024-10-12 19:49:28,388 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 19:49:28,397 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 19:49:28,411 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 19:49:29,729 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 19:49:29,744 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-10-12 19:49:29,744 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 7 [2024-10-12 19:49:29,787 INFO L349 Elim1Store]: treesize reduction 29, result has 34.1 percent of original size [2024-10-12 19:49:29,787 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 19:49:30,180 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 4 proven. 49 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-10-12 19:49:30,180 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 19:49:30,916 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 51 treesize of output 35 [2024-10-12 19:49:31,224 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 11 proven. 21 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-10-12 19:49:31,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 19:49:31,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399436900] [2024-10-12 19:49:31,224 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-12 19:49:31,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833871001] [2024-10-12 19:49:31,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833871001] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 19:49:31,224 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-12 19:49:31,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2024-10-12 19:49:31,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073929000] [2024-10-12 19:49:31,225 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-12 19:49:31,225 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-10-12 19:49:31,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 19:49:31,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-10-12 19:49:31,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=619, Unknown=0, NotChecked=0, Total=702 [2024-10-12 19:49:31,226 INFO L87 Difference]: Start difference. First operand 125 states and 146 transitions. Second operand has 27 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 10 states have call successors, (18), 9 states have call predecessors, (18), 5 states have return successors, (12), 4 states have call predecessors, (12), 6 states have call successors, (12) [2024-10-12 19:49:36,062 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2024-10-12 19:49:40,077 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2024-10-12 19:49:43,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 19:49:43,764 INFO L93 Difference]: Finished difference Result 163 states and 184 transitions. [2024-10-12 19:49:43,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-10-12 19:49:43,765 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 10 states have call successors, (18), 9 states have call predecessors, (18), 5 states have return successors, (12), 4 states have call predecessors, (12), 6 states have call successors, (12) Word has length 48 [2024-10-12 19:49:43,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 19:49:43,769 INFO L225 Difference]: With dead ends: 163 [2024-10-12 19:49:43,769 INFO L226 Difference]: Without dead ends: 161 [2024-10-12 19:49:43,770 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 59 SyntacticMatches, 10 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 746 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=407, Invalid=2785, Unknown=0, NotChecked=0, Total=3192 [2024-10-12 19:49:43,771 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 167 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 917 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 1028 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 917 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2024-10-12 19:49:43,771 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 257 Invalid, 1028 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 917 Invalid, 0 Unknown, 0 Unchecked, 7.0s Time] [2024-10-12 19:49:43,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2024-10-12 19:49:43,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 157. [2024-10-12 19:49:43,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 98 states have (on average 1.0612244897959184) internal successors, (104), 101 states have internal predecessors, (104), 36 states have call successors, (36), 19 states have call predecessors, (36), 22 states have return successors, (39), 36 states have call predecessors, (39), 33 states have call successors, (39) [2024-10-12 19:49:43,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 179 transitions. [2024-10-12 19:49:43,816 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 179 transitions. Word has length 48 [2024-10-12 19:49:43,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 19:49:43,817 INFO L471 AbstractCegarLoop]: Abstraction has 157 states and 179 transitions. [2024-10-12 19:49:43,817 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 10 states have call successors, (18), 9 states have call predecessors, (18), 5 states have return successors, (12), 4 states have call predecessors, (12), 6 states have call successors, (12) [2024-10-12 19:49:43,818 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 179 transitions. [2024-10-12 19:49:43,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-10-12 19:49:43,820 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 19:49:43,823 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 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 19:49:43,842 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 19:49:44,023 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 19:49:44,024 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 19:49:44,024 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 19:49:44,024 INFO L85 PathProgramCache]: Analyzing trace with hash 1232163489, now seen corresponding path program 1 times [2024-10-12 19:49:44,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 19:49:44,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776455508] [2024-10-12 19:49:44,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 19:49:44,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 19:49:44,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-12 19:49:44,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [51921921] [2024-10-12 19:49:44,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 19:49:44,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 19:49:44,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 19:49:44,060 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 19:49:44,061 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 19:49:44,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:49:44,169 INFO L255 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 54 conjuncts are in the unsatisfiable core [2024-10-12 19:49:44,173 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 19:49:44,190 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 19:49:44,212 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 48 treesize of output 35 [2024-10-12 19:49:44,234 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2024-10-12 19:49:44,251 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2024-10-12 19:49:44,270 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 19:49:47,041 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 11 [2024-10-12 19:49:48,154 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-12 19:49:48,154 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 78 treesize of output 78 [2024-10-12 19:49:48,425 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 5 proven. 43 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-10-12 19:49:48,426 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 19:49:48,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 19:49:48,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776455508] [2024-10-12 19:49:48,953 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-12 19:49:48,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51921921] [2024-10-12 19:49:48,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51921921] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 19:49:48,954 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-12 19:49:48,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2024-10-12 19:49:48,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536724904] [2024-10-12 19:49:48,954 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-12 19:49:48,954 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-12 19:49:48,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 19:49:48,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-12 19:49:48,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2024-10-12 19:49:48,955 INFO L87 Difference]: Start difference. First operand 157 states and 179 transitions. Second operand has 17 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 5 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 2 states have call predecessors, (7), 4 states have call successors, (7) [2024-10-12 19:49:53,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 19:49:53,602 INFO L93 Difference]: Finished difference Result 165 states and 185 transitions. [2024-10-12 19:49:53,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-10-12 19:49:53,602 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 5 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 2 states have call predecessors, (7), 4 states have call successors, (7) Word has length 48 [2024-10-12 19:49:53,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 19:49:53,604 INFO L225 Difference]: With dead ends: 165 [2024-10-12 19:49:53,604 INFO L226 Difference]: Without dead ends: 163 [2024-10-12 19:49:53,605 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 26 SyntacticMatches, 10 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=280, Invalid=1202, Unknown=0, NotChecked=0, Total=1482 [2024-10-12 19:49:53,605 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 92 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 447 mSolverCounterSat, 80 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 447 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2024-10-12 19:49:53,605 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 63 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 447 Invalid, 1 Unknown, 0 Unchecked, 1.9s Time] [2024-10-12 19:49:53,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2024-10-12 19:49:53,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 161. [2024-10-12 19:49:53,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 101 states have (on average 1.0594059405940595) internal successors, (107), 104 states have internal predecessors, (107), 36 states have call successors, (36), 20 states have call predecessors, (36), 23 states have return successors, (39), 36 states have call predecessors, (39), 33 states have call successors, (39) [2024-10-12 19:49:53,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 182 transitions. [2024-10-12 19:49:53,661 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 182 transitions. Word has length 48 [2024-10-12 19:49:53,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 19:49:53,662 INFO L471 AbstractCegarLoop]: Abstraction has 161 states and 182 transitions. [2024-10-12 19:49:53,662 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 5 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 2 states have call predecessors, (7), 4 states have call successors, (7) [2024-10-12 19:49:53,662 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 182 transitions. [2024-10-12 19:49:53,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-10-12 19:49:53,663 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 19:49:53,663 INFO L215 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 19:49:53,677 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-10-12 19:49:53,863 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 19:49:53,864 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 19:49:53,864 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 19:49:53,864 INFO L85 PathProgramCache]: Analyzing trace with hash -1233992248, now seen corresponding path program 3 times [2024-10-12 19:49:53,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 19:49:53,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737090443] [2024-10-12 19:49:53,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 19:49:53,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 19:49:53,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-12 19:49:53,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1657580116] [2024-10-12 19:49:53,907 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-12 19:49:53,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 19:49:53,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 19:49:53,909 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 19:49:53,911 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 19:49:54,017 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-10-12 19:49:54,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 19:49:54,020 INFO L255 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 82 conjuncts are in the unsatisfiable core [2024-10-12 19:49:54,023 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 19:49:54,031 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 19:49:54,042 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 19:49:54,054 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 19:49:55,429 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 19:49:55,441 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 19:49:56,066 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-10-12 19:49:56,066 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 19:49:56,835 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 14 proven. 7 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-10-12 19:49:56,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 19:49:56,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737090443] [2024-10-12 19:49:56,836 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-12 19:49:56,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657580116] [2024-10-12 19:49:56,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657580116] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 19:49:56,836 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-12 19:49:56,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 20 [2024-10-12 19:49:56,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82769306] [2024-10-12 19:49:56,837 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-12 19:49:56,837 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-12 19:49:56,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 19:49:56,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-12 19:49:56,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2024-10-12 19:49:56,841 INFO L87 Difference]: Start difference. First operand 161 states and 182 transitions. Second operand has 20 states, 16 states have (on average 2.5) internal successors, (40), 14 states have internal predecessors, (40), 8 states have call successors, (20), 9 states have call predecessors, (20), 3 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2024-10-12 19:50:00,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 19:50:00,288 INFO L93 Difference]: Finished difference Result 171 states and 189 transitions. [2024-10-12 19:50:00,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-12 19:50:00,288 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 16 states have (on average 2.5) internal successors, (40), 14 states have internal predecessors, (40), 8 states have call successors, (20), 9 states have call predecessors, (20), 3 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 54 [2024-10-12 19:50:00,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 19:50:00,290 INFO L225 Difference]: With dead ends: 171 [2024-10-12 19:50:00,290 INFO L226 Difference]: Without dead ends: 169 [2024-10-12 19:50:00,291 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 77 SyntacticMatches, 12 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=115, Invalid=641, Unknown=0, NotChecked=0, Total=756 [2024-10-12 19:50:00,291 INFO L432 NwaCegarLoop]: 54 mSDtfsCounter, 89 mSDsluCounter, 417 mSDsCounter, 0 mSdLazyCounter, 946 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 471 SdHoareTripleChecker+Invalid, 979 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 946 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2024-10-12 19:50:00,292 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 471 Invalid, 979 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 946 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2024-10-12 19:50:00,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2024-10-12 19:50:00,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 165. [2024-10-12 19:50:00,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 104 states have (on average 1.0576923076923077) internal successors, (110), 107 states have internal predecessors, (110), 36 states have call successors, (36), 21 states have call predecessors, (36), 24 states have return successors, (39), 36 states have call predecessors, (39), 33 states have call successors, (39) [2024-10-12 19:50:00,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 185 transitions. [2024-10-12 19:50:00,338 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 185 transitions. Word has length 54 [2024-10-12 19:50:00,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 19:50:00,338 INFO L471 AbstractCegarLoop]: Abstraction has 165 states and 185 transitions. [2024-10-12 19:50:00,338 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 16 states have (on average 2.5) internal successors, (40), 14 states have internal predecessors, (40), 8 states have call successors, (20), 9 states have call predecessors, (20), 3 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2024-10-12 19:50:00,338 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 185 transitions. [2024-10-12 19:50:00,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-10-12 19:50:00,339 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 19:50:00,339 INFO L215 NwaCegarLoop]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:50:00,363 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-10-12 19:50:00,540 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 19:50:00,540 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 19:50:00,541 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 19:50:00,541 INFO L85 PathProgramCache]: Analyzing trace with hash 1062890782, now seen corresponding path program 1 times [2024-10-12 19:50:00,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 19:50:00,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45086293] [2024-10-12 19:50:00,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 19:50:00,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 19:50:00,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-12 19:50:00,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1537086785] [2024-10-12 19:50:00,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 19:50:00,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 19:50:00,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 19:50:00,565 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 19:50:00,570 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 19:50:00,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:50:00,693 INFO L255 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-10-12 19:50:00,696 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 19:50:00,710 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 48 treesize of output 35 [2024-10-12 19:50:00,724 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2024-10-12 19:50:00,749 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2024-10-12 19:50:00,757 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 19:50:00,772 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 19:50:02,880 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 19:50:04,287 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-12 19:50:04,287 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 68 treesize of output 72 [2024-10-12 19:50:04,612 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 6 proven. 64 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-10-12 19:50:04,612 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 19:50:05,199 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 30 treesize of output 22 [2024-10-12 19:50:06,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 19:50:06,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45086293] [2024-10-12 19:50:06,259 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-12 19:50:06,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537086785] [2024-10-12 19:50:06,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537086785] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 19:50:06,260 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-12 19:50:06,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2024-10-12 19:50:06,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744264672] [2024-10-12 19:50:06,260 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-12 19:50:06,260 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-12 19:50:06,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 19:50:06,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-12 19:50:06,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2024-10-12 19:50:06,261 INFO L87 Difference]: Start difference. First operand 165 states and 185 transitions. Second operand has 18 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 2 states have call predecessors, (8), 4 states have call successors, (8) [2024-10-12 19:50:09,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 19:50:09,701 INFO L93 Difference]: Finished difference Result 173 states and 191 transitions. [2024-10-12 19:50:09,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-10-12 19:50:09,702 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 2 states have call predecessors, (8), 4 states have call successors, (8) Word has length 54 [2024-10-12 19:50:09,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 19:50:09,704 INFO L225 Difference]: With dead ends: 173 [2024-10-12 19:50:09,704 INFO L226 Difference]: Without dead ends: 171 [2024-10-12 19:50:09,704 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 42 SyntacticMatches, 12 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=256, Invalid=1466, Unknown=0, NotChecked=0, Total=1722 [2024-10-12 19:50:09,705 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 75 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 578 mSolverCounterSat, 72 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 578 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-10-12 19:50:09,705 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 63 Invalid, 652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 578 Invalid, 2 Unknown, 0 Unchecked, 1.5s Time] [2024-10-12 19:50:09,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2024-10-12 19:50:09,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 169. [2024-10-12 19:50:09,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 107 states have (on average 1.0560747663551402) internal successors, (113), 110 states have internal predecessors, (113), 36 states have call successors, (36), 22 states have call predecessors, (36), 25 states have return successors, (39), 36 states have call predecessors, (39), 33 states have call successors, (39) [2024-10-12 19:50:09,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 188 transitions. [2024-10-12 19:50:09,755 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 188 transitions. Word has length 54 [2024-10-12 19:50:09,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 19:50:09,756 INFO L471 AbstractCegarLoop]: Abstraction has 169 states and 188 transitions. [2024-10-12 19:50:09,756 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 2 states have call predecessors, (8), 4 states have call successors, (8) [2024-10-12 19:50:09,756 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 188 transitions. [2024-10-12 19:50:09,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-10-12 19:50:09,757 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 19:50:09,757 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 19:50:09,771 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-10-12 19:50:09,957 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 19:50:09,958 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 19:50:09,958 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 19:50:09,958 INFO L85 PathProgramCache]: Analyzing trace with hash -1669742887, now seen corresponding path program 1 times [2024-10-12 19:50:09,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 19:50:09,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064752022] [2024-10-12 19:50:09,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 19:50:09,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 19:50:09,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-12 19:50:09,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1544750322] [2024-10-12 19:50:09,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 19:50:09,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 19:50:09,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 19:50:09,987 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 19:50:09,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-12 19:50:10,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:50:10,100 INFO L255 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-10-12 19:50:10,102 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 19:50:10,115 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 19:50:10,131 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 19:50:10,145 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 19:50:11,068 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 60 proven. 28 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-10-12 19:50:11,069 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 19:50:13,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 19:50:13,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064752022] [2024-10-12 19:50:13,359 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-12 19:50:13,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544750322] [2024-10-12 19:50:13,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544750322] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 19:50:13,359 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-12 19:50:13,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2024-10-12 19:50:13,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986309452] [2024-10-12 19:50:13,359 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-12 19:50:13,360 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-12 19:50:13,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 19:50:13,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-12 19:50:13,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2024-10-12 19:50:13,360 INFO L87 Difference]: Start difference. First operand 169 states and 188 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-10-12 19:50:14,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 19:50:14,188 INFO L93 Difference]: Finished difference Result 177 states and 194 transitions. [2024-10-12 19:50:14,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-12 19:50:14,189 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 60 [2024-10-12 19:50:14,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 19:50:14,190 INFO L225 Difference]: With dead ends: 177 [2024-10-12 19:50:14,190 INFO L226 Difference]: Without dead ends: 175 [2024-10-12 19:50:14,190 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 73 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2024-10-12 19:50:14,191 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 31 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 40 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-12 19:50:14,191 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 85 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 252 Invalid, 3 Unknown, 0 Unchecked, 0.5s Time] [2024-10-12 19:50:14,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2024-10-12 19:50:14,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 173. [2024-10-12 19:50:14,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 110 states have (on average 1.0545454545454545) internal successors, (116), 113 states have internal predecessors, (116), 36 states have call successors, (36), 23 states have call predecessors, (36), 26 states have return successors, (39), 36 states have call predecessors, (39), 33 states have call successors, (39) [2024-10-12 19:50:14,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 191 transitions. [2024-10-12 19:50:14,248 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 191 transitions. Word has length 60 [2024-10-12 19:50:14,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 19:50:14,248 INFO L471 AbstractCegarLoop]: Abstraction has 173 states and 191 transitions. [2024-10-12 19:50:14,248 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-10-12 19:50:14,248 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 191 transitions. [2024-10-12 19:50:14,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-10-12 19:50:14,249 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 19:50:14,249 INFO L215 NwaCegarLoop]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:50:14,262 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-10-12 19:50:14,449 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-10-12 19:50:14,450 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 19:50:14,450 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 19:50:14,450 INFO L85 PathProgramCache]: Analyzing trace with hash -422813358, now seen corresponding path program 1 times [2024-10-12 19:50:14,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 19:50:14,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922219186] [2024-10-12 19:50:14,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 19:50:14,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 19:50:14,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-12 19:50:14,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1276165376] [2024-10-12 19:50:14,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 19:50:14,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 19:50:14,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 19:50:14,476 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 19:50:14,477 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-12 19:50:14,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:50:14,581 INFO L255 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-10-12 19:50:14,583 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 19:50:14,588 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 19:50:14,594 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 19:50:15,082 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 90 proven. 8 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-10-12 19:50:15,082 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 19:50:15,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 19:50:15,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922219186] [2024-10-12 19:50:15,422 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-12 19:50:15,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276165376] [2024-10-12 19:50:15,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276165376] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 19:50:15,422 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-12 19:50:15,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2024-10-12 19:50:15,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975844365] [2024-10-12 19:50:15,423 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-12 19:50:15,423 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-12 19:50:15,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 19:50:15,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-12 19:50:15,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-10-12 19:50:15,424 INFO L87 Difference]: Start difference. First operand 173 states and 191 transitions. Second operand has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2024-10-12 19:50:16,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 19:50:16,116 INFO L93 Difference]: Finished difference Result 181 states and 197 transitions. [2024-10-12 19:50:16,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-12 19:50:16,117 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 66 [2024-10-12 19:50:16,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 19:50:16,118 INFO L225 Difference]: With dead ends: 181 [2024-10-12 19:50:16,118 INFO L226 Difference]: Without dead ends: 177 [2024-10-12 19:50:16,118 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 84 SyntacticMatches, 9 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2024-10-12 19:50:16,118 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 28 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 38 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-12 19:50:16,119 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 84 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 205 Invalid, 3 Unknown, 0 Unchecked, 0.5s Time] [2024-10-12 19:50:16,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2024-10-12 19:50:16,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 175. [2024-10-12 19:50:16,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 112 states have (on average 1.0446428571428572) internal successors, (117), 114 states have internal predecessors, (117), 36 states have call successors, (36), 24 states have call predecessors, (36), 26 states have return successors, (39), 36 states have call predecessors, (39), 33 states have call successors, (39) [2024-10-12 19:50:16,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 192 transitions. [2024-10-12 19:50:16,175 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 192 transitions. Word has length 66 [2024-10-12 19:50:16,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 19:50:16,175 INFO L471 AbstractCegarLoop]: Abstraction has 175 states and 192 transitions. [2024-10-12 19:50:16,175 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2024-10-12 19:50:16,175 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 192 transitions. [2024-10-12 19:50:16,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-10-12 19:50:16,176 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 19:50:16,176 INFO L215 NwaCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:50:16,195 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-10-12 19:50:16,377 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-10-12 19:50:16,377 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 19:50:16,377 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 19:50:16,377 INFO L85 PathProgramCache]: Analyzing trace with hash 1635143177, now seen corresponding path program 1 times [2024-10-12 19:50:16,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 19:50:16,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584245413] [2024-10-12 19:50:16,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 19:50:16,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 19:50:16,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-12 19:50:16,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1033266848] [2024-10-12 19:50:16,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 19:50:16,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 19:50:16,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 19:50:16,414 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 19:50:16,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-12 19:50:16,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:50:16,547 INFO L255 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 67 conjuncts are in the unsatisfiable core [2024-10-12 19:50:16,549 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 19:50:16,560 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 19:50:16,570 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 19:50:16,579 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 19:50:21,176 WARN L873 $PredicateComparison]: unable to prove that (exists ((|v_func_to_recursive_line_29_to_41_0_#in~z.offset_BEFORE_CALL_15| Int) (|v_func_to_recursive_line_29_to_41_0_#in~x.offset_BEFORE_CALL_5| Int) (|v_func_to_recursive_line_29_to_41_0_#in~z.base_BEFORE_CALL_15| Int) (|v_func_to_recursive_line_29_to_41_0_#in~x.base_BEFORE_CALL_5| Int) (|v_func_to_recursive_line_29_to_41_0_#in~y.offset_BEFORE_CALL_5| Int) (|v_func_to_recursive_line_29_to_41_0_#in~y.base_BEFORE_CALL_5| Int)) (let ((.cse1 (select (select |c_#memory_int#1| |v_func_to_recursive_line_29_to_41_0_#in~z.base_BEFORE_CALL_15|) |v_func_to_recursive_line_29_to_41_0_#in~z.offset_BEFORE_CALL_15|)) (.cse0 (select (select |c_#memory_int#3| |v_func_to_recursive_line_29_to_41_0_#in~y.base_BEFORE_CALL_5|) |v_func_to_recursive_line_29_to_41_0_#in~y.offset_BEFORE_CALL_5|))) (and (= (mod (* .cse0 .cse1) 2) 0) (<= .cse1 (+ (div (* (- 1) .cse0 .cse1) 2) 3 (* .cse0 6) (* 9 (select (select |c_#memory_int#2| |v_func_to_recursive_line_29_to_41_0_#in~x.base_BEFORE_CALL_5|) |v_func_to_recursive_line_29_to_41_0_#in~x.offset_BEFORE_CALL_5|))))))) is different from true [2024-10-12 19:50:22,168 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 94 proven. 26 refuted. 0 times theorem prover too weak. 55 trivial. 25 not checked. [2024-10-12 19:50:22,168 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 19:50:24,323 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 89 treesize of output 69 [2024-10-12 19:50:24,334 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 69 treesize of output 61 [2024-10-12 19:50:24,346 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 61 treesize of output 41 [2024-10-12 19:50:31,805 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 28 proven. 19 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2024-10-12 19:50:31,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 19:50:31,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584245413] [2024-10-12 19:50:31,805 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-12 19:50:31,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033266848] [2024-10-12 19:50:31,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033266848] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 19:50:31,806 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-12 19:50:31,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2024-10-12 19:50:31,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678769641] [2024-10-12 19:50:31,806 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-12 19:50:31,806 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-10-12 19:50:31,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 19:50:31,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-10-12 19:50:31,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=394, Unknown=2, NotChecked=40, Total=506 [2024-10-12 19:50:31,807 INFO L87 Difference]: Start difference. First operand 175 states and 192 transitions. Second operand has 23 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 20 states have internal predecessors, (50), 11 states have call successors, (24), 6 states have call predecessors, (24), 7 states have return successors, (22), 6 states have call predecessors, (22), 9 states have call successors, (22)