./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursified_nla-digbench/recursified_egcd-ll.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c7c6ca5d Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/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 ../sv-benchmarks/c/recursified_nla-digbench/recursified_egcd-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 494d69f416dd1b0b56dc0371ee72744b83dbc298da37778d271d6f779b4cdcdc --- Real Ultimate output --- This is Ultimate 0.2.5-?-c7c6ca5-m [2024-11-08 15:23:59,050 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-08 15:23:59,106 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-08 15:23:59,111 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-08 15:23:59,112 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-08 15:23:59,140 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-08 15:23:59,140 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-08 15:23:59,141 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-08 15:23:59,141 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-08 15:23:59,143 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-08 15:23:59,144 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-08 15:23:59,144 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-08 15:23:59,144 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-08 15:23:59,146 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-08 15:23:59,147 INFO L153 SettingsManager]: * Use SBE=true [2024-11-08 15:23:59,147 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-08 15:23:59,147 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-08 15:23:59,147 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-08 15:23:59,147 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-08 15:23:59,148 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-08 15:23:59,148 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-08 15:23:59,148 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-08 15:23:59,148 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-08 15:23:59,149 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-08 15:23:59,149 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-08 15:23:59,149 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-08 15:23:59,149 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-08 15:23:59,150 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-08 15:23:59,150 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-08 15:23:59,150 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-08 15:23:59,151 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-08 15:23:59,151 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-08 15:23:59,151 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 15:23:59,151 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-08 15:23:59,152 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-08 15:23:59,152 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-08 15:23:59,152 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-08 15:23:59,153 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-08 15:23:59,153 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-08 15:23:59,153 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-08 15:23:59,153 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-08 15:23:59,153 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-08 15:23:59,154 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 494d69f416dd1b0b56dc0371ee72744b83dbc298da37778d271d6f779b4cdcdc [2024-11-08 15:23:59,344 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-08 15:23:59,364 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-08 15:23:59,366 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-08 15:23:59,367 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-08 15:23:59,368 INFO L274 PluginConnector]: CDTParser initialized [2024-11-08 15:23:59,369 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursified_nla-digbench/recursified_egcd-ll.c [2024-11-08 15:24:00,590 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-08 15:24:00,713 INFO L384 CDTParser]: Found 1 translation units. [2024-11-08 15:24:00,713 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursified_nla-digbench/recursified_egcd-ll.c [2024-11-08 15:24:00,720 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de049b704/21a20e5e68c44b0da472b68da5fb9b90/FLAGe86ec1a42 [2024-11-08 15:24:00,730 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de049b704/21a20e5e68c44b0da472b68da5fb9b90 [2024-11-08 15:24:00,732 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-08 15:24:00,733 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-08 15:24:00,736 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-08 15:24:00,736 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-08 15:24:00,740 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-08 15:24:00,740 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 03:24:00" (1/1) ... [2024-11-08 15:24:00,741 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a8cc1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 03:24:00, skipping insertion in model container [2024-11-08 15:24:00,741 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 03:24:00" (1/1) ... [2024-11-08 15:24:00,757 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-08 15:24:00,908 WARN L250 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_egcd-ll.c[1019,1032] [2024-11-08 15:24:00,921 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 15:24:00,932 INFO L200 MainTranslator]: Completed pre-run [2024-11-08 15:24:00,940 WARN L250 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_egcd-ll.c[1019,1032] [2024-11-08 15:24:00,951 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 15:24:00,965 INFO L204 MainTranslator]: Completed translation [2024-11-08 15:24:00,965 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 03:24:00 WrapperNode [2024-11-08 15:24:00,965 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-08 15:24:00,966 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-08 15:24:00,966 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-08 15:24:00,966 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-08 15:24:00,971 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 03:24:00" (1/1) ... [2024-11-08 15:24:00,977 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 03:24:00" (1/1) ... [2024-11-08 15:24:00,994 INFO L138 Inliner]: procedures = 16, calls = 106, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 112 [2024-11-08 15:24:00,994 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-08 15:24:00,995 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-08 15:24:00,995 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-08 15:24:00,995 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-08 15:24:01,003 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 03:24:00" (1/1) ... [2024-11-08 15:24:01,003 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 03:24:00" (1/1) ... [2024-11-08 15:24:01,005 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 03:24:00" (1/1) ... [2024-11-08 15:24:01,020 INFO L175 MemorySlicer]: Split 66 memory accesses to 9 slices as follows [2, 7, 7, 8, 10, 8, 8, 8, 8]. 15 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0, 0, 0, 0, 0]. The 14 writes are split as follows [0, 1, 1, 2, 2, 2, 2, 2, 2]. [2024-11-08 15:24:01,021 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 03:24:00" (1/1) ... [2024-11-08 15:24:01,021 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 03:24:00" (1/1) ... [2024-11-08 15:24:01,026 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 03:24:00" (1/1) ... [2024-11-08 15:24:01,028 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 03:24:00" (1/1) ... [2024-11-08 15:24:01,029 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 03:24:00" (1/1) ... [2024-11-08 15:24:01,030 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 03:24:00" (1/1) ... [2024-11-08 15:24:01,033 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-08 15:24:01,033 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-08 15:24:01,033 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-08 15:24:01,034 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-08 15:24:01,034 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 03:24:00" (1/1) ... [2024-11-08 15:24:01,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 15:24:01,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 15:24:01,062 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) [2024-11-08 15:24:01,065 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 [2024-11-08 15:24:01,110 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-08 15:24:01,110 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_33_to_48_0 [2024-11-08 15:24:01,110 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_33_to_48_0 [2024-11-08 15:24:01,110 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-08 15:24:01,110 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-08 15:24:01,110 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-08 15:24:01,110 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-08 15:24:01,111 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-08 15:24:01,111 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-11-08 15:24:01,111 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-11-08 15:24:01,111 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-11-08 15:24:01,111 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2024-11-08 15:24:01,111 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#7 [2024-11-08 15:24:01,111 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#8 [2024-11-08 15:24:01,111 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-08 15:24:01,111 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-08 15:24:01,111 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-08 15:24:01,111 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-08 15:24:01,111 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-11-08 15:24:01,111 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-11-08 15:24:01,112 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-11-08 15:24:01,112 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#6 [2024-11-08 15:24:01,112 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#7 [2024-11-08 15:24:01,112 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#8 [2024-11-08 15:24:01,112 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-08 15:24:01,112 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-08 15:24:01,112 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-08 15:24:01,112 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-08 15:24:01,112 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-08 15:24:01,113 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-11-08 15:24:01,113 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-11-08 15:24:01,113 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-11-08 15:24:01,114 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2024-11-08 15:24:01,114 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#7 [2024-11-08 15:24:01,114 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#8 [2024-11-08 15:24:01,114 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-08 15:24:01,114 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-08 15:24:01,114 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-08 15:24:01,222 INFO L238 CfgBuilder]: Building ICFG [2024-11-08 15:24:01,223 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-08 15:24:01,432 INFO L? ?]: Removed 13 outVars from TransFormulas that were not future-live. [2024-11-08 15:24:01,433 INFO L287 CfgBuilder]: Performing block encoding [2024-11-08 15:24:01,445 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-08 15:24:01,445 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-08 15:24:01,445 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 03:24:01 BoogieIcfgContainer [2024-11-08 15:24:01,445 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-08 15:24:01,448 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-08 15:24:01,448 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-08 15:24:01,451 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-08 15:24:01,451 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.11 03:24:00" (1/3) ... [2024-11-08 15:24:01,452 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2dd31b38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 03:24:01, skipping insertion in model container [2024-11-08 15:24:01,452 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 03:24:00" (2/3) ... [2024-11-08 15:24:01,452 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2dd31b38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 03:24:01, skipping insertion in model container [2024-11-08 15:24:01,452 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 03:24:01" (3/3) ... [2024-11-08 15:24:01,453 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_egcd-ll.c [2024-11-08 15:24:01,464 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-08 15:24:01,464 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-08 15:24:01,504 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-08 15:24:01,509 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;@310ea5f0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-08 15:24:01,509 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-08 15:24:01,516 INFO L276 IsEmpty]: Start isEmpty. Operand has 42 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 28 states have internal predecessors, (32), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-11-08 15:24:01,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-08 15:24:01,521 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 15:24:01,521 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 15:24:01,522 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 15:24:01,526 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 15:24:01,526 INFO L85 PathProgramCache]: Analyzing trace with hash -1587638685, now seen corresponding path program 1 times [2024-11-08 15:24:01,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 15:24:01,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823394679] [2024-11-08 15:24:01,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 15:24:01,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 15:24:01,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:24:01,717 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 15:24:01,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:24:01,727 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-08 15:24:01,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:24:01,740 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 15:24:01,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 15:24:01,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823394679] [2024-11-08 15:24:01,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823394679] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 15:24:01,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 15:24:01,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-08 15:24:01,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277692036] [2024-11-08 15:24:01,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 15:24:01,749 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-08 15:24:01,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 15:24:01,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-08 15:24:01,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-08 15:24:01,768 INFO L87 Difference]: Start difference. First operand has 42 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 28 states have internal predecessors, (32), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-08 15:24:01,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 15:24:01,788 INFO L93 Difference]: Finished difference Result 81 states and 115 transitions. [2024-11-08 15:24:01,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-08 15:24:01,790 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2024-11-08 15:24:01,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 15:24:01,820 INFO L225 Difference]: With dead ends: 81 [2024-11-08 15:24:01,820 INFO L226 Difference]: Without dead ends: 38 [2024-11-08 15:24:01,823 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-08 15:24:01,829 INFO L432 NwaCegarLoop]: 51 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-08 15:24:01,830 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 15:24:01,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2024-11-08 15:24:01,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2024-11-08 15:24:01,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 25 states have internal predecessors, (26), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-08 15:24:01,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 47 transitions. [2024-11-08 15:24:01,893 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 47 transitions. Word has length 21 [2024-11-08 15:24:01,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 15:24:01,894 INFO L471 AbstractCegarLoop]: Abstraction has 38 states and 47 transitions. [2024-11-08 15:24:01,894 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-08 15:24:01,895 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 47 transitions. [2024-11-08 15:24:01,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-08 15:24:01,896 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 15:24:01,896 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 15:24:01,896 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-08 15:24:01,897 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 15:24:01,897 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 15:24:01,897 INFO L85 PathProgramCache]: Analyzing trace with hash 1820045287, now seen corresponding path program 1 times [2024-11-08 15:24:01,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 15:24:01,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350402082] [2024-11-08 15:24:01,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 15:24:01,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 15:24:01,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-08 15:24:01,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1234695110] [2024-11-08 15:24:01,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 15:24:01,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 15:24:01,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 15:24:01,977 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) [2024-11-08 15:24:01,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-08 15:24:02,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:24:02,137 INFO L255 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-11-08 15:24:02,143 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 15:24:02,202 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 [2024-11-08 15:24:02,211 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 [2024-11-08 15:24:02,219 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 [2024-11-08 15:24:02,351 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 15:24:02,351 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 15:24:02,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 15:24:02,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350402082] [2024-11-08 15:24:02,351 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-08 15:24:02,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234695110] [2024-11-08 15:24:02,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234695110] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 15:24:02,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 15:24:02,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-08 15:24:02,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743917794] [2024-11-08 15:24:02,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 15:24:02,353 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-08 15:24:02,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 15:24:02,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-08 15:24:02,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-11-08 15:24:02,356 INFO L87 Difference]: Start difference. First operand 38 states and 47 transitions. Second operand has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-08 15:24:02,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 15:24:02,596 INFO L93 Difference]: Finished difference Result 64 states and 82 transitions. [2024-11-08 15:24:02,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-08 15:24:02,598 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 21 [2024-11-08 15:24:02,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 15:24:02,600 INFO L225 Difference]: With dead ends: 64 [2024-11-08 15:24:02,601 INFO L226 Difference]: Without dead ends: 62 [2024-11-08 15:24:02,602 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-11-08 15:24:02,603 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 21 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-08 15:24:02,604 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 203 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-08 15:24:02,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2024-11-08 15:24:02,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 57. [2024-11-08 15:24:02,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 35 states have (on average 1.1428571428571428) internal successors, (40), 38 states have internal predecessors, (40), 15 states have call successors, (15), 5 states have call predecessors, (15), 6 states have return successors, (18), 14 states have call predecessors, (18), 14 states have call successors, (18) [2024-11-08 15:24:02,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 73 transitions. [2024-11-08 15:24:02,619 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 73 transitions. Word has length 21 [2024-11-08 15:24:02,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 15:24:02,620 INFO L471 AbstractCegarLoop]: Abstraction has 57 states and 73 transitions. [2024-11-08 15:24:02,620 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-08 15:24:02,621 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 73 transitions. [2024-11-08 15:24:02,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-08 15:24:02,621 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 15:24:02,621 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 15:24:02,635 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-08 15:24:02,825 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 [2024-11-08 15:24:02,827 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 15:24:02,827 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 15:24:02,827 INFO L85 PathProgramCache]: Analyzing trace with hash -2119093344, now seen corresponding path program 1 times [2024-11-08 15:24:02,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 15:24:02,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809775915] [2024-11-08 15:24:02,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 15:24:02,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 15:24:02,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-08 15:24:02,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1494559540] [2024-11-08 15:24:02,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 15:24:02,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 15:24:02,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 15:24:02,939 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) [2024-11-08 15:24:02,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-08 15:24:03,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:24:03,055 INFO L255 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 65 conjuncts are in the unsatisfiable core [2024-11-08 15:24:03,058 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 15:24:03,067 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-08 15:24:03,081 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 [2024-11-08 15:24:03,088 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 [2024-11-08 15:24:03,098 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-08 15:24:03,291 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-08 15:24:03,295 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-08 15:24:03,341 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 15:24:03,342 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 15:24:03,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 15:24:03,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809775915] [2024-11-08 15:24:03,502 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-08 15:24:03,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494559540] [2024-11-08 15:24:03,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494559540] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 15:24:03,502 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-08 15:24:03,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2024-11-08 15:24:03,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053486564] [2024-11-08 15:24:03,503 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-08 15:24:03,503 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-08 15:24:03,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 15:24:03,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-08 15:24:03,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-11-08 15:24:03,504 INFO L87 Difference]: Start difference. First operand 57 states and 73 transitions. Second operand has 9 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-08 15:24:03,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 15:24:03,786 INFO L93 Difference]: Finished difference Result 80 states and 98 transitions. [2024-11-08 15:24:03,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-08 15:24:03,787 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2024-11-08 15:24:03,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 15:24:03,788 INFO L225 Difference]: With dead ends: 80 [2024-11-08 15:24:03,788 INFO L226 Difference]: Without dead ends: 78 [2024-11-08 15:24:03,788 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2024-11-08 15:24:03,789 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 38 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-08 15:24:03,789 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 198 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-08 15:24:03,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2024-11-08 15:24:03,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 71. [2024-11-08 15:24:03,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 44 states have (on average 1.1363636363636365) internal successors, (50), 47 states have internal predecessors, (50), 19 states have call successors, (19), 7 states have call predecessors, (19), 7 states have return successors, (19), 18 states have call predecessors, (19), 17 states have call successors, (19) [2024-11-08 15:24:03,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 88 transitions. [2024-11-08 15:24:03,803 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 88 transitions. Word has length 27 [2024-11-08 15:24:03,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 15:24:03,803 INFO L471 AbstractCegarLoop]: Abstraction has 71 states and 88 transitions. [2024-11-08 15:24:03,803 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-08 15:24:03,803 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 88 transitions. [2024-11-08 15:24:03,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-08 15:24:03,804 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 15:24:03,804 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 15:24:03,818 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-08 15:24:04,007 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 [2024-11-08 15:24:04,008 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 15:24:04,009 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 15:24:04,009 INFO L85 PathProgramCache]: Analyzing trace with hash 694161815, now seen corresponding path program 1 times [2024-11-08 15:24:04,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 15:24:04,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042555805] [2024-11-08 15:24:04,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 15:24:04,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 15:24:04,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-08 15:24:04,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1130143723] [2024-11-08 15:24:04,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 15:24:04,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 15:24:04,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 15:24:04,079 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) [2024-11-08 15:24:04,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-08 15:24:04,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:24:04,182 INFO L255 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 75 conjuncts are in the unsatisfiable core [2024-11-08 15:24:04,186 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 15:24:04,191 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-08 15:24:04,195 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-08 15:24:04,229 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 [2024-11-08 15:24:04,233 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-08 15:24:04,238 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-08 15:24:04,482 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-08 15:24:04,485 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 22 treesize of output 10 [2024-11-08 15:24:04,491 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-11-08 15:24:04,526 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-08 15:24:04,527 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 15:24:04,716 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-08 15:24:04,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 15:24:04,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042555805] [2024-11-08 15:24:04,716 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-08 15:24:04,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130143723] [2024-11-08 15:24:04,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130143723] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-08 15:24:04,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-08 15:24:04,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [13] total 17 [2024-11-08 15:24:04,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938818224] [2024-11-08 15:24:04,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 15:24:04,717 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-08 15:24:04,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 15:24:04,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-08 15:24:04,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2024-11-08 15:24:04,718 INFO L87 Difference]: Start difference. First operand 71 states and 88 transitions. Second operand has 8 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-08 15:24:05,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 15:24:05,291 INFO L93 Difference]: Finished difference Result 115 states and 146 transitions. [2024-11-08 15:24:05,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-08 15:24:05,291 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 33 [2024-11-08 15:24:05,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 15:24:05,293 INFO L225 Difference]: With dead ends: 115 [2024-11-08 15:24:05,293 INFO L226 Difference]: Without dead ends: 113 [2024-11-08 15:24:05,293 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 44 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2024-11-08 15:24:05,294 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 22 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-08 15:24:05,294 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 178 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-08 15:24:05,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2024-11-08 15:24:05,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 106. [2024-11-08 15:24:05,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 67 states have (on average 1.1492537313432836) internal successors, (77), 71 states have internal predecessors, (77), 26 states have call successors, (26), 11 states have call predecessors, (26), 12 states have return successors, (30), 25 states have call predecessors, (30), 24 states have call successors, (30) [2024-11-08 15:24:05,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 133 transitions. [2024-11-08 15:24:05,321 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 133 transitions. Word has length 33 [2024-11-08 15:24:05,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 15:24:05,321 INFO L471 AbstractCegarLoop]: Abstraction has 106 states and 133 transitions. [2024-11-08 15:24:05,321 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-08 15:24:05,322 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 133 transitions. [2024-11-08 15:24:05,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-08 15:24:05,323 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 15:24:05,323 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 15:24:05,338 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-08 15:24:05,523 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 [2024-11-08 15:24:05,524 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 15:24:05,524 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 15:24:05,525 INFO L85 PathProgramCache]: Analyzing trace with hash 1798714572, now seen corresponding path program 1 times [2024-11-08 15:24:05,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 15:24:05,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164110358] [2024-11-08 15:24:05,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 15:24:05,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 15:24:05,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:24:05,823 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 15:24:05,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:24:05,826 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-08 15:24:05,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:24:05,840 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-11-08 15:24:05,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:24:05,947 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 15:24:05,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:24:05,952 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-08 15:24:05,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:24:05,959 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-11-08 15:24:05,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:24:05,965 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-08 15:24:05,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 15:24:05,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164110358] [2024-11-08 15:24:05,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164110358] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 15:24:05,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 15:24:05,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-11-08 15:24:05,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485068731] [2024-11-08 15:24:05,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 15:24:05,967 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-08 15:24:05,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 15:24:05,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-08 15:24:05,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2024-11-08 15:24:05,968 INFO L87 Difference]: Start difference. First operand 106 states and 133 transitions. Second operand has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-08 15:24:06,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 15:24:06,298 INFO L93 Difference]: Finished difference Result 120 states and 146 transitions. [2024-11-08 15:24:06,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-08 15:24:06,300 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 43 [2024-11-08 15:24:06,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 15:24:06,302 INFO L225 Difference]: With dead ends: 120 [2024-11-08 15:24:06,302 INFO L226 Difference]: Without dead ends: 118 [2024-11-08 15:24:06,303 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2024-11-08 15:24:06,303 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 26 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-08 15:24:06,304 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 125 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-08 15:24:06,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2024-11-08 15:24:06,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2024-11-08 15:24:06,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 75 states have (on average 1.1333333333333333) internal successors, (85), 79 states have internal predecessors, (85), 26 states have call successors, (26), 13 states have call predecessors, (26), 16 states have return successors, (32), 25 states have call predecessors, (32), 24 states have call successors, (32) [2024-11-08 15:24:06,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 143 transitions. [2024-11-08 15:24:06,329 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 143 transitions. Word has length 43 [2024-11-08 15:24:06,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 15:24:06,329 INFO L471 AbstractCegarLoop]: Abstraction has 118 states and 143 transitions. [2024-11-08 15:24:06,329 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-08 15:24:06,329 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 143 transitions. [2024-11-08 15:24:06,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-08 15:24:06,330 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 15:24:06,330 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 15:24:06,330 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-08 15:24:06,331 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 15:24:06,331 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 15:24:06,331 INFO L85 PathProgramCache]: Analyzing trace with hash -1804783998, now seen corresponding path program 1 times [2024-11-08 15:24:06,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 15:24:06,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718910763] [2024-11-08 15:24:06,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 15:24:06,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 15:24:06,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-08 15:24:06,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [665076114] [2024-11-08 15:24:06,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 15:24:06,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 15:24:06,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 15:24:06,370 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) [2024-11-08 15:24:06,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-08 15:24:06,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:24:06,493 INFO L255 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 105 conjuncts are in the unsatisfiable core [2024-11-08 15:24:06,496 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 15:24:06,502 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 [2024-11-08 15:24:06,509 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 [2024-11-08 15:24:06,512 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 [2024-11-08 15:24:06,518 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-08 15:24:06,785 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 [2024-11-08 15:24:06,790 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 25 treesize of output 13 [2024-11-08 15:24:06,843 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-11-08 15:24:06,878 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-08 15:24:06,880 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 15:24:18,575 WARN L851 $PredicateComparison]: unable to prove that (forall ((|v_func_to_recursive_line_33_to_48_0_#t~mem6_8| Int)) (let ((.cse0 (select (select |c_#memory_int#3| c_func_to_recursive_line_33_to_48_0_~s.base) c_func_to_recursive_line_33_to_48_0_~s.offset))) (or (= (* .cse0 (select (select |c_#memory_int#8| c_func_to_recursive_line_33_to_48_0_~p.base) c_func_to_recursive_line_33_to_48_0_~p.offset)) (let ((.cse1 (select (select |c_#memory_int#6| c_func_to_recursive_line_33_to_48_0_~q.base) c_func_to_recursive_line_33_to_48_0_~q.offset))) (+ (* |v_func_to_recursive_line_33_to_48_0_#t~mem6_8| .cse1) (* .cse0 .cse1) 1))) (< (select (select |c_#memory_int#5| c_func_to_recursive_line_33_to_48_0_~r.base) c_func_to_recursive_line_33_to_48_0_~r.offset) (+ |v_func_to_recursive_line_33_to_48_0_#t~mem6_8| .cse0))))) is different from false [2024-11-08 15:24:18,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 15:24:18,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718910763] [2024-11-08 15:24:18,631 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-08 15:24:18,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665076114] [2024-11-08 15:24:18,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665076114] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 15:24:18,631 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-08 15:24:18,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2024-11-08 15:24:18,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382864527] [2024-11-08 15:24:18,632 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-08 15:24:18,633 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-08 15:24:18,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 15:24:18,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-08 15:24:18,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=145, Unknown=2, NotChecked=24, Total=210 [2024-11-08 15:24:18,634 INFO L87 Difference]: Start difference. First operand 118 states and 143 transitions. Second operand has 11 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-08 15:24:19,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 15:24:19,053 INFO L93 Difference]: Finished difference Result 169 states and 199 transitions. [2024-11-08 15:24:19,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-08 15:24:19,054 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 44 [2024-11-08 15:24:19,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 15:24:19,055 INFO L225 Difference]: With dead ends: 169 [2024-11-08 15:24:19,055 INFO L226 Difference]: Without dead ends: 167 [2024-11-08 15:24:19,056 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 34 SyntacticMatches, 7 SemanticMatches, 19 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=90, Invalid=292, Unknown=2, NotChecked=36, Total=420 [2024-11-08 15:24:19,056 INFO L432 NwaCegarLoop]: 41 mSDtfsCounter, 50 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-08 15:24:19,057 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 254 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-08 15:24:19,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2024-11-08 15:24:19,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 162. [2024-11-08 15:24:19,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 104 states have (on average 1.1153846153846154) internal successors, (116), 108 states have internal predecessors, (116), 34 states have call successors, (34), 20 states have call predecessors, (34), 23 states have return successors, (38), 33 states have call predecessors, (38), 30 states have call successors, (38) [2024-11-08 15:24:19,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 188 transitions. [2024-11-08 15:24:19,077 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 188 transitions. Word has length 44 [2024-11-08 15:24:19,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 15:24:19,077 INFO L471 AbstractCegarLoop]: Abstraction has 162 states and 188 transitions. [2024-11-08 15:24:19,078 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-08 15:24:19,078 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 188 transitions. [2024-11-08 15:24:19,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-08 15:24:19,079 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 15:24:19,079 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 15:24:19,092 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-08 15:24:19,279 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 15:24:19,280 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 15:24:19,280 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 15:24:19,280 INFO L85 PathProgramCache]: Analyzing trace with hash 795700175, now seen corresponding path program 1 times [2024-11-08 15:24:19,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 15:24:19,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885607409] [2024-11-08 15:24:19,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 15:24:19,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 15:24:19,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-08 15:24:19,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [58267241] [2024-11-08 15:24:19,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 15:24:19,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 15:24:19,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 15:24:19,303 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) [2024-11-08 15:24:19,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-08 15:24:19,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:24:19,410 INFO L255 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-11-08 15:24:19,413 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 15:24:19,416 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-08 15:24:19,421 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 [2024-11-08 15:24:19,424 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 [2024-11-08 15:24:19,428 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-08 15:24:19,433 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-08 15:24:19,451 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-08 15:24:19,456 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-08 15:24:19,562 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-08 15:24:19,729 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 15:24:19,730 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 41 treesize of output 37 [2024-11-08 15:24:19,738 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 15:24:19,739 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 46 treesize of output 38 [2024-11-08 15:24:19,745 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-08 15:24:19,782 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-08 15:24:19,783 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 15:24:44,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 15:24:44,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885607409] [2024-11-08 15:24:44,296 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-08 15:24:44,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58267241] [2024-11-08 15:24:44,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58267241] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 15:24:44,296 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-08 15:24:44,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2024-11-08 15:24:44,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21075008] [2024-11-08 15:24:44,296 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-08 15:24:44,296 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-08 15:24:44,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 15:24:44,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-08 15:24:44,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=282, Unknown=5, NotChecked=0, Total=342 [2024-11-08 15:24:44,297 INFO L87 Difference]: Start difference. First operand 162 states and 188 transitions. Second operand has 12 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2024-11-08 15:25:00,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 15:25:00,254 INFO L93 Difference]: Finished difference Result 170 states and 194 transitions. [2024-11-08 15:25:00,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-08 15:25:00,255 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 49 [2024-11-08 15:25:00,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 15:25:00,256 INFO L225 Difference]: With dead ends: 170 [2024-11-08 15:25:00,256 INFO L226 Difference]: Without dead ends: 168 [2024-11-08 15:25:00,256 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 28.7s TimeCoverageRelationStatistics Valid=120, Invalid=525, Unknown=5, NotChecked=0, Total=650 [2024-11-08 15:25:00,257 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 33 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.1s IncrementalHoareTripleChecker+Time [2024-11-08 15:25:00,257 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 104 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 346 Invalid, 0 Unknown, 0 Unchecked, 10.1s Time] [2024-11-08 15:25:00,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2024-11-08 15:25:00,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 166. [2024-11-08 15:25:00,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 107 states have (on average 1.1121495327102804) internal successors, (119), 111 states have internal predecessors, (119), 34 states have call successors, (34), 21 states have call predecessors, (34), 24 states have return successors, (38), 33 states have call predecessors, (38), 30 states have call successors, (38) [2024-11-08 15:25:00,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 191 transitions. [2024-11-08 15:25:00,279 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 191 transitions. Word has length 49 [2024-11-08 15:25:00,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 15:25:00,280 INFO L471 AbstractCegarLoop]: Abstraction has 166 states and 191 transitions. [2024-11-08 15:25:00,280 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2024-11-08 15:25:00,280 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 191 transitions. [2024-11-08 15:25:00,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-08 15:25:00,283 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 15:25:00,283 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 15:25:00,297 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-08 15:25:00,484 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 15:25:00,484 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 15:25:00,485 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 15:25:00,485 INFO L85 PathProgramCache]: Analyzing trace with hash -1989012997, now seen corresponding path program 2 times [2024-11-08 15:25:00,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 15:25:00,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913801292] [2024-11-08 15:25:00,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 15:25:00,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 15:25:00,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-08 15:25:00,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1368902773] [2024-11-08 15:25:00,516 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 15:25:00,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 15:25:00,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 15:25:00,518 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) [2024-11-08 15:25:00,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-08 15:25:00,644 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 15:25:00,645 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 15:25:00,651 INFO L255 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 199 conjuncts are in the unsatisfiable core [2024-11-08 15:25:00,656 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 15:25:00,939 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-08 15:25:01,153 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-08 15:25:03,225 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 [2024-11-08 15:25:03,332 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 [2024-11-08 15:25:03,438 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-08 15:25:03,754 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 [2024-11-08 15:25:03,860 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-08 15:25:03,965 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 [2024-11-08 15:25:22,067 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 13 [2024-11-08 15:25:22,172 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 [2024-11-08 15:25:22,375 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-11-08 15:25:22,557 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 35 treesize of output 27 [2024-11-08 15:25:22,610 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 35 treesize of output 21 [2024-11-08 15:25:29,086 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 25 treesize of output 17 [2024-11-08 15:25:29,138 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2024-11-08 15:25:29,191 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-11-08 15:25:31,255 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-08 15:25:31,255 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 15:25:39,422 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-08 15:25:39,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 15:25:39,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913801292] [2024-11-08 15:25:39,423 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-08 15:25:39,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368902773] [2024-11-08 15:25:39,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368902773] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 15:25:39,423 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-08 15:25:39,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10] total 24 [2024-11-08 15:25:39,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709668535] [2024-11-08 15:25:39,423 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-08 15:25:39,424 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-08 15:25:39,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 15:25:39,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-08 15:25:39,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2024-11-08 15:25:39,425 INFO L87 Difference]: Start difference. First operand 166 states and 191 transitions. Second operand has 24 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 11 states have call successors, (18), 9 states have call predecessors, (18), 4 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12)