./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursified_nla-digbench/recursified_hard-u.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_hard-u.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 27783f29349ebae8401558a8bc17fafd87092d54a86e2af0abb3d67f703ff6c0 --- Real Ultimate output --- This is Ultimate 0.2.5-?-c7c6ca5-m [2024-11-08 15:25:12,772 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-08 15:25:12,846 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-08 15:25:12,852 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-08 15:25:12,853 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-08 15:25:12,897 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-08 15:25:12,898 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-08 15:25:12,898 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-08 15:25:12,899 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-08 15:25:12,900 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-08 15:25:12,900 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-08 15:25:12,909 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-08 15:25:12,910 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-08 15:25:12,910 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-08 15:25:12,910 INFO L153 SettingsManager]: * Use SBE=true [2024-11-08 15:25:12,911 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-08 15:25:12,911 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-08 15:25:12,911 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-08 15:25:12,912 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-08 15:25:12,912 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-08 15:25:12,916 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-08 15:25:12,916 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-08 15:25:12,916 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-08 15:25:12,917 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-08 15:25:12,917 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-08 15:25:12,917 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-08 15:25:12,920 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-08 15:25:12,920 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-08 15:25:12,921 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-08 15:25:12,921 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-08 15:25:12,921 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-08 15:25:12,921 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-08 15:25:12,922 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 15:25:12,922 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-08 15:25:12,922 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-08 15:25:12,922 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-08 15:25:12,922 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-08 15:25:12,923 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-08 15:25:12,923 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-08 15:25:12,923 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-08 15:25:12,924 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-08 15:25:12,924 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-08 15:25:12,925 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 27783f29349ebae8401558a8bc17fafd87092d54a86e2af0abb3d67f703ff6c0 [2024-11-08 15:25:13,165 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-08 15:25:13,187 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-08 15:25:13,190 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-08 15:25:13,191 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-08 15:25:13,192 INFO L274 PluginConnector]: CDTParser initialized [2024-11-08 15:25:13,193 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursified_nla-digbench/recursified_hard-u.c [2024-11-08 15:25:14,569 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-08 15:25:14,754 INFO L384 CDTParser]: Found 1 translation units. [2024-11-08 15:25:14,755 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursified_nla-digbench/recursified_hard-u.c [2024-11-08 15:25:14,763 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7cb1be6e7/b6f3a64fc98642a797027387296490c0/FLAG17320a6c3 [2024-11-08 15:25:15,145 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7cb1be6e7/b6f3a64fc98642a797027387296490c0 [2024-11-08 15:25:15,147 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-08 15:25:15,148 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-08 15:25:15,151 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-08 15:25:15,152 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-08 15:25:15,156 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-08 15:25:15,157 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 03:25:15" (1/1) ... [2024-11-08 15:25:15,158 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40e645b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 03:25:15, skipping insertion in model container [2024-11-08 15:25:15,160 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 03:25:15" (1/1) ... [2024-11-08 15:25:15,181 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-08 15:25:15,326 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_hard-u.c[1080,1093] [2024-11-08 15:25:15,343 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 15:25:15,352 INFO L200 MainTranslator]: Completed pre-run [2024-11-08 15:25:15,361 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_hard-u.c[1080,1093] [2024-11-08 15:25:15,376 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 15:25:15,394 INFO L204 MainTranslator]: Completed translation [2024-11-08 15:25:15,395 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 03:25:15 WrapperNode [2024-11-08 15:25:15,395 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-08 15:25:15,396 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-08 15:25:15,399 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-08 15:25:15,399 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-08 15:25:15,404 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 03:25:15" (1/1) ... [2024-11-08 15:25:15,411 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 03:25:15" (1/1) ... [2024-11-08 15:25:15,447 INFO L138 Inliner]: procedures = 17, calls = 84, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 77 [2024-11-08 15:25:15,447 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-08 15:25:15,452 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-08 15:25:15,452 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-08 15:25:15,453 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-08 15:25:15,462 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 03:25:15" (1/1) ... [2024-11-08 15:25:15,463 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 03:25:15" (1/1) ... [2024-11-08 15:25:15,465 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 03:25:15" (1/1) ... [2024-11-08 15:25:15,497 INFO L175 MemorySlicer]: Split 49 memory accesses to 7 slices as follows [7, 2, 8, 12, 9, 5, 6]. 24 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [0, 2, 0, 0, 0, 0, 0]. The 12 writes are split as follows [1, 0, 2, 3, 3, 1, 2]. [2024-11-08 15:25:15,498 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 03:25:15" (1/1) ... [2024-11-08 15:25:15,501 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 03:25:15" (1/1) ... [2024-11-08 15:25:15,510 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 03:25:15" (1/1) ... [2024-11-08 15:25:15,514 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 03:25:15" (1/1) ... [2024-11-08 15:25:15,515 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 03:25:15" (1/1) ... [2024-11-08 15:25:15,517 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 03:25:15" (1/1) ... [2024-11-08 15:25:15,519 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-08 15:25:15,520 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-08 15:25:15,520 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-08 15:25:15,521 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-08 15:25:15,521 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 03:25:15" (1/1) ... [2024-11-08 15:25:15,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 15:25:15,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 15:25:15,551 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 15:25:15,563 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 15:25:15,605 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-08 15:25:15,605 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-08 15:25:15,605 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-08 15:25:15,605 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-08 15:25:15,605 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-11-08 15:25:15,606 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-11-08 15:25:15,606 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-11-08 15:25:15,608 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2024-11-08 15:25:15,608 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_41_to_51_0 [2024-11-08 15:25:15,608 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_41_to_51_0 [2024-11-08 15:25:15,608 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-08 15:25:15,608 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_31_to_38_0 [2024-11-08 15:25:15,608 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_31_to_38_0 [2024-11-08 15:25:15,608 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-08 15:25:15,609 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-08 15:25:15,609 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-08 15:25:15,609 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-11-08 15:25:15,609 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-11-08 15:25:15,609 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-11-08 15:25:15,609 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#6 [2024-11-08 15:25:15,609 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-08 15:25:15,609 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-08 15:25:15,609 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-08 15:25:15,609 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-08 15:25:15,609 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-08 15:25:15,610 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-11-08 15:25:15,610 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-11-08 15:25:15,610 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-11-08 15:25:15,610 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2024-11-08 15:25:15,610 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-08 15:25:15,610 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-08 15:25:15,612 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-08 15:25:15,731 INFO L238 CfgBuilder]: Building ICFG [2024-11-08 15:25:15,733 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-08 15:25:16,035 INFO L? ?]: Removed 12 outVars from TransFormulas that were not future-live. [2024-11-08 15:25:16,035 INFO L287 CfgBuilder]: Performing block encoding [2024-11-08 15:25:16,048 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-08 15:25:16,048 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-08 15:25:16,048 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 03:25:16 BoogieIcfgContainer [2024-11-08 15:25:16,049 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-08 15:25:16,051 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-08 15:25:16,051 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-08 15:25:16,054 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-08 15:25:16,054 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.11 03:25:15" (1/3) ... [2024-11-08 15:25:16,056 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e04d986 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 03:25:16, skipping insertion in model container [2024-11-08 15:25:16,056 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 03:25:15" (2/3) ... [2024-11-08 15:25:16,057 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e04d986 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 03:25:16, skipping insertion in model container [2024-11-08 15:25:16,057 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 03:25:16" (3/3) ... [2024-11-08 15:25:16,058 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_hard-u.c [2024-11-08 15:25:16,071 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-08 15:25:16,072 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-08 15:25:16,121 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-08 15:25:16,126 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;@5fb65b23, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-08 15:25:16,127 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-08 15:25:16,130 INFO L276 IsEmpty]: Start isEmpty. Operand has 43 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 30 states have internal predecessors, (35), 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 15:25:16,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-08 15:25:16,137 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 15:25:16,138 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 15:25:16,138 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 15:25:16,142 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 15:25:16,143 INFO L85 PathProgramCache]: Analyzing trace with hash -1478725466, now seen corresponding path program 1 times [2024-11-08 15:25:16,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 15:25:16,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306139209] [2024-11-08 15:25:16,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 15:25:16,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 15:25:16,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:25:16,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 15:25:16,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 15:25:16,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306139209] [2024-11-08 15:25:16,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306139209] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 15:25:16,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 15:25:16,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-08 15:25:16,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692354753] [2024-11-08 15:25:16,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 15:25:16,833 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-08 15:25:16,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 15:25:16,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-08 15:25:16,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-11-08 15:25:16,869 INFO L87 Difference]: Start difference. First operand has 43 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 30 states have internal predecessors, (35), 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 8 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 15:25:17,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 15:25:17,073 INFO L93 Difference]: Finished difference Result 87 states and 125 transitions. [2024-11-08 15:25:17,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-08 15:25:17,076 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-11-08 15:25:17,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 15:25:17,081 INFO L225 Difference]: With dead ends: 87 [2024-11-08 15:25:17,081 INFO L226 Difference]: Without dead ends: 43 [2024-11-08 15:25:17,084 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 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 15:25:17,087 INFO L432 NwaCegarLoop]: 46 mSDtfsCounter, 18 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 15:25:17,088 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 259 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 15:25:17,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-11-08 15:25:17,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2024-11-08 15:25:17,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 30 states have internal predecessors, (31), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-08 15:25:17,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 52 transitions. [2024-11-08 15:25:17,118 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 52 transitions. Word has length 11 [2024-11-08 15:25:17,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 15:25:17,119 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 52 transitions. [2024-11-08 15:25:17,119 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 15:25:17,119 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 52 transitions. [2024-11-08 15:25:17,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-08 15:25:17,120 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 15:25:17,120 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 15:25:17,120 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-08 15:25:17,120 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 15:25:17,121 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 15:25:17,121 INFO L85 PathProgramCache]: Analyzing trace with hash -198448255, now seen corresponding path program 1 times [2024-11-08 15:25:17,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 15:25:17,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719710704] [2024-11-08 15:25:17,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 15:25:17,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 15:25:17,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:25:17,510 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-08 15:25:17,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:25:17,518 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 15:25:17,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 15:25:17,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719710704] [2024-11-08 15:25:17,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719710704] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 15:25:17,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 15:25:17,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-08 15:25:17,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153964379] [2024-11-08 15:25:17,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 15:25:17,521 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-08 15:25:17,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 15:25:17,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-08 15:25:17,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-11-08 15:25:17,525 INFO L87 Difference]: Start difference. First operand 43 states and 52 transitions. Second operand has 8 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-08 15:25:17,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 15:25:17,694 INFO L93 Difference]: Finished difference Result 49 states and 57 transitions. [2024-11-08 15:25:17,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-08 15:25:17,696 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2024-11-08 15:25:17,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 15:25:17,697 INFO L225 Difference]: With dead ends: 49 [2024-11-08 15:25:17,697 INFO L226 Difference]: Without dead ends: 47 [2024-11-08 15:25:17,698 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 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 15:25:17,699 INFO L432 NwaCegarLoop]: 44 mSDtfsCounter, 17 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 15:25:17,701 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 237 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 15:25:17,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-11-08 15:25:17,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2024-11-08 15:25:17,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 33 states have internal predecessors, (34), 11 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-08 15:25:17,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2024-11-08 15:25:17,715 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 17 [2024-11-08 15:25:17,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 15:25:17,716 INFO L471 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2024-11-08 15:25:17,716 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-08 15:25:17,716 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2024-11-08 15:25:17,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-11-08 15:25:17,717 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 15:25:17,717 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 15:25:17,718 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-08 15:25:17,718 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 15:25:17,718 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 15:25:17,719 INFO L85 PathProgramCache]: Analyzing trace with hash -2047647974, now seen corresponding path program 1 times [2024-11-08 15:25:17,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 15:25:17,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328989578] [2024-11-08 15:25:17,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 15:25:17,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 15:25:17,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-08 15:25:17,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1477668334] [2024-11-08 15:25:17,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 15:25:17,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 15:25:17,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 15:25:17,763 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 15:25:17,764 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 15:25:17,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:25:18,002 INFO L255 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 57 conjuncts are in the unsatisfiable core [2024-11-08 15:25:18,011 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 15:25:18,081 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 15 treesize of output 1 [2024-11-08 15:25:18,150 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 15:25:18,158 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 15:25:18,631 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2024-11-08 15:25:18,642 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 15:25:18,719 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 15:25:18,719 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 15:25:19,084 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 15:25:19,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 15:25:19,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328989578] [2024-11-08 15:25:19,085 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-08 15:25:19,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477668334] [2024-11-08 15:25:19,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1477668334] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-08 15:25:19,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-08 15:25:19,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [13] total 17 [2024-11-08 15:25:19,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590707194] [2024-11-08 15:25:19,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 15:25:19,087 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-08 15:25:19,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 15:25:19,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-08 15:25:19,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2024-11-08 15:25:19,088 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand has 8 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 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 15:25:20,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 15:25:20,124 INFO L93 Difference]: Finished difference Result 58 states and 68 transitions. [2024-11-08 15:25:20,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-08 15:25:20,125 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 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 23 [2024-11-08 15:25:20,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 15:25:20,127 INFO L225 Difference]: With dead ends: 58 [2024-11-08 15:25:20,127 INFO L226 Difference]: Without dead ends: 56 [2024-11-08 15:25:20,127 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2024-11-08 15:25:20,129 INFO L432 NwaCegarLoop]: 43 mSDtfsCounter, 15 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-08 15:25:20,129 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 229 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-08 15:25:20,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-11-08 15:25:20,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 51. [2024-11-08 15:25:20,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 33 states have (on average 1.121212121212121) internal successors, (37), 36 states have internal predecessors, (37), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-08 15:25:20,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 58 transitions. [2024-11-08 15:25:20,148 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 58 transitions. Word has length 23 [2024-11-08 15:25:20,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 15:25:20,148 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 58 transitions. [2024-11-08 15:25:20,149 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 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 15:25:20,149 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 58 transitions. [2024-11-08 15:25:20,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-08 15:25:20,150 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 15:25:20,151 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 15:25:20,159 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 15:25:20,351 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 15:25:20,352 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 15:25:20,352 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 15:25:20,352 INFO L85 PathProgramCache]: Analyzing trace with hash 2108612391, now seen corresponding path program 1 times [2024-11-08 15:25:20,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 15:25:20,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612838532] [2024-11-08 15:25:20,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 15:25:20,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 15:25:20,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-08 15:25:20,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1381074941] [2024-11-08 15:25:20,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 15:25:20,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 15:25:20,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 15:25:20,409 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 15:25:20,412 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 15:25:20,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:25:20,595 INFO L255 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 75 conjuncts are in the unsatisfiable core [2024-11-08 15:25:20,599 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 15:25:20,604 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-08 15:25:20,609 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 15:25:20,615 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-08 15:25:21,277 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 15:25:21,278 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 45 treesize of output 41 [2024-11-08 15:25:21,302 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 15:25:21,303 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 59 treesize of output 63 [2024-11-08 15:25:21,392 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-08 15:25:21,392 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 15:25:22,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 15:25:22,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612838532] [2024-11-08 15:25:22,455 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-08 15:25:22,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381074941] [2024-11-08 15:25:22,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381074941] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 15:25:22,456 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-08 15:25:22,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2024-11-08 15:25:22,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664961533] [2024-11-08 15:25:22,456 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-08 15:25:22,457 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-08 15:25:22,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 15:25:22,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-08 15:25:22,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2024-11-08 15:25:22,458 INFO L87 Difference]: Start difference. First operand 51 states and 58 transitions. Second operand has 17 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 14 states have internal predecessors, (22), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-08 15:25:23,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 15:25:23,652 INFO L93 Difference]: Finished difference Result 83 states and 97 transitions. [2024-11-08 15:25:23,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-08 15:25:23,653 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 14 states have internal predecessors, (22), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) Word has length 35 [2024-11-08 15:25:23,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 15:25:23,654 INFO L225 Difference]: With dead ends: 83 [2024-11-08 15:25:23,655 INFO L226 Difference]: Without dead ends: 81 [2024-11-08 15:25:23,655 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=123, Invalid=807, Unknown=0, NotChecked=0, Total=930 [2024-11-08 15:25:23,656 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 40 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 22 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-08 15:25:23,656 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 268 Invalid, 504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 479 Invalid, 3 Unknown, 0 Unchecked, 0.7s Time] [2024-11-08 15:25:23,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2024-11-08 15:25:23,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 74. [2024-11-08 15:25:23,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 48 states have (on average 1.1458333333333333) internal successors, (55), 52 states have internal predecessors, (55), 16 states have call successors, (16), 9 states have call predecessors, (16), 9 states have return successors, (16), 15 states have call predecessors, (16), 14 states have call successors, (16) [2024-11-08 15:25:23,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 87 transitions. [2024-11-08 15:25:23,675 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 87 transitions. Word has length 35 [2024-11-08 15:25:23,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 15:25:23,675 INFO L471 AbstractCegarLoop]: Abstraction has 74 states and 87 transitions. [2024-11-08 15:25:23,676 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 14 states have internal predecessors, (22), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-08 15:25:23,676 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 87 transitions. [2024-11-08 15:25:23,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-08 15:25:23,677 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 15:25:23,677 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 15:25:23,686 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-08 15:25:23,878 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,SelfDestructingSolverStorable3 [2024-11-08 15:25:23,878 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 15:25:23,880 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 15:25:23,880 INFO L85 PathProgramCache]: Analyzing trace with hash 779340471, now seen corresponding path program 1 times [2024-11-08 15:25:23,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 15:25:23,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274967573] [2024-11-08 15:25:23,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 15:25:23,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 15:25:23,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-08 15:25:23,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [747232324] [2024-11-08 15:25:23,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 15:25:23,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 15:25:23,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 15:25:23,939 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 15:25:23,943 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 15:25:24,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:25:24,114 INFO L255 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 77 conjuncts are in the unsatisfiable core [2024-11-08 15:25:24,119 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 15:25:24,123 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 15:25:24,126 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 15:25:24,129 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-08 15:25:24,149 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 15:25:24,372 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 15:25:24,374 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 15:25:24,409 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-08 15:25:24,410 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 15:25:25,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 15:25:25,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274967573] [2024-11-08 15:25:25,118 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-08 15:25:25,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747232324] [2024-11-08 15:25:25,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747232324] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 15:25:25,118 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-08 15:25:25,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2024-11-08 15:25:25,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029893430] [2024-11-08 15:25:25,119 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-08 15:25:25,119 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-08 15:25:25,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 15:25:25,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-08 15:25:25,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2024-11-08 15:25:25,120 INFO L87 Difference]: Start difference. First operand 74 states and 87 transitions. Second operand has 12 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-11-08 15:25:25,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 15:25:25,633 INFO L93 Difference]: Finished difference Result 133 states and 151 transitions. [2024-11-08 15:25:25,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-08 15:25:25,634 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 41 [2024-11-08 15:25:25,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 15:25:25,635 INFO L225 Difference]: With dead ends: 133 [2024-11-08 15:25:25,635 INFO L226 Difference]: Without dead ends: 131 [2024-11-08 15:25:25,636 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2024-11-08 15:25:25,636 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 61 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 35 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-08 15:25:25,637 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 152 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 297 Invalid, 3 Unknown, 0 Unchecked, 0.3s Time] [2024-11-08 15:25:25,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2024-11-08 15:25:25,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 129. [2024-11-08 15:25:25,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 84 states have (on average 1.119047619047619) internal successors, (94), 88 states have internal predecessors, (94), 24 states have call successors, (24), 17 states have call predecessors, (24), 20 states have return successors, (30), 23 states have call predecessors, (30), 21 states have call successors, (30) [2024-11-08 15:25:25,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 148 transitions. [2024-11-08 15:25:25,668 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 148 transitions. Word has length 41 [2024-11-08 15:25:25,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 15:25:25,668 INFO L471 AbstractCegarLoop]: Abstraction has 129 states and 148 transitions. [2024-11-08 15:25:25,669 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-11-08 15:25:25,669 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 148 transitions. [2024-11-08 15:25:25,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-11-08 15:25:25,670 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 15:25:25,670 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 15:25:25,679 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 15:25:25,871 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 15:25:25,871 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 15:25:25,872 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 15:25:25,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1188844321, now seen corresponding path program 1 times [2024-11-08 15:25:25,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 15:25:25,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843929233] [2024-11-08 15:25:25,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 15:25:25,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 15:25:25,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-08 15:25:25,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [90517034] [2024-11-08 15:25:25,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 15:25:25,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 15:25:25,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 15:25:25,926 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 15:25:25,930 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 15:25:26,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:25:26,124 INFO L255 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 94 conjuncts are in the unsatisfiable core [2024-11-08 15:25:26,129 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 15:25:26,133 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 15:25:26,135 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 15:25:26,157 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 15:25:26,159 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 15:25:26,164 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 15:25:26,170 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 15:25:26,199 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-08 15:25:30,424 WARN L873 $PredicateComparison]: unable to prove that (exists ((|v_func_to_recursive_line_41_to_51_0_#in~q.offset_BEFORE_CALL_2| Int) (|v_func_to_recursive_line_41_to_51_0_#in~r.offset_BEFORE_CALL_2| Int) (|v_func_to_recursive_line_41_to_51_0_#in~A.base_BEFORE_CALL_2| Int) (|v_func_to_recursive_line_41_to_51_0_#in~B.offset_BEFORE_CALL_2| Int) (|v_func_to_recursive_line_41_to_51_0_#in~r.base_BEFORE_CALL_2| Int) (|v_func_to_recursive_line_41_to_51_0_#in~q.base_BEFORE_CALL_2| Int) (|v_func_to_recursive_line_41_to_51_0_#in~B.base_BEFORE_CALL_2| Int) (|v_func_to_recursive_line_41_to_51_0_#in~A.offset_BEFORE_CALL_2| Int)) (= (mod (+ (* (select (select |c_#memory_int#0| |v_func_to_recursive_line_41_to_51_0_#in~B.base_BEFORE_CALL_2|) |v_func_to_recursive_line_41_to_51_0_#in~B.offset_BEFORE_CALL_2|) (select (select |c_#memory_int#6| |v_func_to_recursive_line_41_to_51_0_#in~q.base_BEFORE_CALL_2|) |v_func_to_recursive_line_41_to_51_0_#in~q.offset_BEFORE_CALL_2|)) (select (select |c_#memory_int#2| |v_func_to_recursive_line_41_to_51_0_#in~r.base_BEFORE_CALL_2|) |v_func_to_recursive_line_41_to_51_0_#in~r.offset_BEFORE_CALL_2|)) 4294967296) (mod (select (select |c_#memory_int#5| |v_func_to_recursive_line_41_to_51_0_#in~A.base_BEFORE_CALL_2|) |v_func_to_recursive_line_41_to_51_0_#in~A.offset_BEFORE_CALL_2|) 4294967296))) is different from true [2024-11-08 15:25:30,595 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 39 treesize of output 31 [2024-11-08 15:25:30,638 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 15:25:30,644 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2024-11-08 15:25:30,648 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 27 treesize of output 19 [2024-11-08 15:25:30,651 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2024-11-08 15:25:30,699 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 29 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 5 not checked. [2024-11-08 15:25:30,699 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 15:25:31,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 15:25:31,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843929233] [2024-11-08 15:25:31,469 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-08 15:25:31,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90517034] [2024-11-08 15:25:31,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90517034] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 15:25:31,470 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-08 15:25:31,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2024-11-08 15:25:31,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422810560] [2024-11-08 15:25:31,470 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-08 15:25:31,470 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-08 15:25:31,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 15:25:31,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-08 15:25:31,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=201, Unknown=1, NotChecked=28, Total=272 [2024-11-08 15:25:31,473 INFO L87 Difference]: Start difference. First operand 129 states and 148 transitions. Second operand has 15 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 5 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2024-11-08 15:25:57,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 15:25:57,405 INFO L93 Difference]: Finished difference Result 143 states and 161 transitions. [2024-11-08 15:25:57,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-08 15:25:57,406 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 5 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 51 [2024-11-08 15:25:57,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 15:25:57,410 INFO L225 Difference]: With dead ends: 143 [2024-11-08 15:25:57,410 INFO L226 Difference]: Without dead ends: 139 [2024-11-08 15:25:57,411 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 29.7s TimeCoverageRelationStatistics Valid=124, Invalid=630, Unknown=6, NotChecked=52, Total=812 [2024-11-08 15:25:57,411 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 25 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 69 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-08 15:25:57,411 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 109 Invalid, 513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 416 Invalid, 0 Unknown, 69 Unchecked, 0.6s Time] [2024-11-08 15:25:57,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2024-11-08 15:25:57,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2024-11-08 15:25:57,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 92 states have (on average 1.1195652173913044) internal successors, (103), 95 states have internal predecessors, (103), 24 states have call successors, (24), 20 states have call predecessors, (24), 22 states have return successors, (30), 23 states have call predecessors, (30), 21 states have call successors, (30) [2024-11-08 15:25:57,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 157 transitions. [2024-11-08 15:25:57,458 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 157 transitions. Word has length 51 [2024-11-08 15:25:57,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 15:25:57,458 INFO L471 AbstractCegarLoop]: Abstraction has 139 states and 157 transitions. [2024-11-08 15:25:57,458 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 5 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2024-11-08 15:25:57,459 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 157 transitions. [2024-11-08 15:25:57,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-11-08 15:25:57,462 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 15:25:57,462 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 15:25:57,472 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-08 15:25:57,666 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 15:25:57,667 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 15:25:57,667 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 15:25:57,667 INFO L85 PathProgramCache]: Analyzing trace with hash -1344068686, now seen corresponding path program 1 times [2024-11-08 15:25:57,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 15:25:57,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754009662] [2024-11-08 15:25:57,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 15:25:57,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 15:25:57,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:25:58,078 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-11-08 15:25:58,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:25:58,120 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 15:25:58,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:25:58,126 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-08 15:25:58,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:25:58,129 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-11-08 15:25:58,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:25:58,132 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-11-08 15:25:58,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:25:58,138 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-11-08 15:25:58,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:25:58,142 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-08 15:25:58,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 15:25:58,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754009662] [2024-11-08 15:25:58,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754009662] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 15:25:58,144 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 15:25:58,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-08 15:25:58,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340796246] [2024-11-08 15:25:58,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 15:25:58,145 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-08 15:25:58,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 15:25:58,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-08 15:25:58,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-08 15:25:58,146 INFO L87 Difference]: Start difference. First operand 139 states and 157 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-08 15:25:58,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 15:25:58,349 INFO L93 Difference]: Finished difference Result 195 states and 222 transitions. [2024-11-08 15:25:58,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-08 15:25:58,350 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 52 [2024-11-08 15:25:58,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 15:25:58,351 INFO L225 Difference]: With dead ends: 195 [2024-11-08 15:25:58,351 INFO L226 Difference]: Without dead ends: 139 [2024-11-08 15:25:58,352 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-11-08 15:25:58,352 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 34 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 15:25:58,353 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 89 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 15:25:58,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2024-11-08 15:25:58,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 137. [2024-11-08 15:25:58,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 91 states have (on average 1.10989010989011) internal successors, (101), 94 states have internal predecessors, (101), 24 states have call successors, (24), 20 states have call predecessors, (24), 21 states have return successors, (26), 23 states have call predecessors, (26), 21 states have call successors, (26) [2024-11-08 15:25:58,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 151 transitions. [2024-11-08 15:25:58,385 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 151 transitions. Word has length 52 [2024-11-08 15:25:58,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 15:25:58,386 INFO L471 AbstractCegarLoop]: Abstraction has 137 states and 151 transitions. [2024-11-08 15:25:58,386 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-08 15:25:58,386 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 151 transitions. [2024-11-08 15:25:58,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-11-08 15:25:58,387 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 15:25:58,387 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 15:25:58,387 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-08 15:25:58,387 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 15:25:58,387 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 15:25:58,388 INFO L85 PathProgramCache]: Analyzing trace with hash -2023520514, now seen corresponding path program 1 times [2024-11-08 15:25:58,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 15:25:58,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650895282] [2024-11-08 15:25:58,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 15:25:58,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 15:25:58,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:25:58,868 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-11-08 15:25:58,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:25:58,920 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 15:25:58,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:25:58,923 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-08 15:25:58,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:25:58,925 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-11-08 15:25:58,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:25:58,941 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-11-08 15:25:58,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:25:58,961 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 15:25:58,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:25:58,965 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-08 15:25:58,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:25:58,968 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-11-08 15:25:58,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:25:58,971 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-08 15:25:58,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 15:25:58,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650895282] [2024-11-08 15:25:58,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650895282] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 15:25:58,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 15:25:58,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-08 15:25:58,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551602773] [2024-11-08 15:25:58,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 15:25:58,973 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-08 15:25:58,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 15:25:58,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-08 15:25:58,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-11-08 15:25:58,974 INFO L87 Difference]: Start difference. First operand 137 states and 151 transitions. Second operand has 9 states, 8 states have (on average 3.125) internal successors, (25), 6 states have internal predecessors, (25), 3 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-08 15:25:59,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 15:25:59,220 INFO L93 Difference]: Finished difference Result 141 states and 155 transitions. [2024-11-08 15:25:59,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-08 15:25:59,221 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.125) internal successors, (25), 6 states have internal predecessors, (25), 3 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 57 [2024-11-08 15:25:59,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 15:25:59,222 INFO L225 Difference]: With dead ends: 141 [2024-11-08 15:25:59,222 INFO L226 Difference]: Without dead ends: 109 [2024-11-08 15:25:59,223 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-11-08 15:25:59,223 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 42 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-08 15:25:59,224 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 83 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-08 15:25:59,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2024-11-08 15:25:59,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 107. [2024-11-08 15:25:59,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 71 states have (on average 1.1267605633802817) internal successors, (80), 74 states have internal predecessors, (80), 19 states have call successors, (19), 15 states have call predecessors, (19), 16 states have return successors, (21), 18 states have call predecessors, (21), 17 states have call successors, (21) [2024-11-08 15:25:59,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 120 transitions. [2024-11-08 15:25:59,245 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 120 transitions. Word has length 57 [2024-11-08 15:25:59,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 15:25:59,245 INFO L471 AbstractCegarLoop]: Abstraction has 107 states and 120 transitions. [2024-11-08 15:25:59,245 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.125) internal successors, (25), 6 states have internal predecessors, (25), 3 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-08 15:25:59,245 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 120 transitions. [2024-11-08 15:25:59,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-11-08 15:25:59,248 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 15:25:59,248 INFO L215 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 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 15:25:59,248 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-08 15:25:59,248 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 15:25:59,248 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 15:25:59,249 INFO L85 PathProgramCache]: Analyzing trace with hash 1358599535, now seen corresponding path program 1 times [2024-11-08 15:25:59,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 15:25:59,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32885104] [2024-11-08 15:25:59,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 15:25:59,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 15:25:59,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-08 15:25:59,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1202537267] [2024-11-08 15:25:59,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 15:25:59,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 15:25:59,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 15:25:59,356 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 15:25:59,357 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 15:25:59,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:25:59,669 INFO L255 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 107 conjuncts are in the unsatisfiable core [2024-11-08 15:25:59,673 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 15:25:59,676 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 15:25:59,821 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 17 treesize of output 9 [2024-11-08 15:25:59,838 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 8 treesize of output 1 [2024-11-08 15:26:03,313 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 29 treesize of output 21 [2024-11-08 15:26:03,318 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2024-11-08 15:26:03,325 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2024-11-08 15:26:08,139 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 53 proven. 10 refuted. 1 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-08 15:26:08,139 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 15:26:29,171 WARN L286 SmtUtils]: Spent 13.97s on a formula simplification that was a NOOP. DAG size: 84 (called from [L 276] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2024-11-08 15:26:35,323 WARN L286 SmtUtils]: Spent 5.20s on a formula simplification that was a NOOP. DAG size: 62 (called from [L 299] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2024-11-08 15:26:41,652 WARN L851 $PredicateComparison]: unable to prove that (and (or (= (mod (* (select (select |c_#memory_int#0| |c_func_to_recursive_line_31_to_38_0_#in~B.base|) |c_func_to_recursive_line_31_to_38_0_#in~B.offset|) (select (select |c_old(#memory_int#4)| |c_func_to_recursive_line_31_to_38_0_#in~p.base|) |c_func_to_recursive_line_31_to_38_0_#in~p.offset|)) 4294967296) (mod (select (select |c_old(#memory_int#3)| |c_func_to_recursive_line_31_to_38_0_#in~d.base|) |c_func_to_recursive_line_31_to_38_0_#in~d.offset|) 4294967296)) (forall ((|v_func_to_recursive_line_31_to_38_0_#in~B.offset_BEFORE_CALL_10| Int) (|v_func_to_recursive_line_31_to_38_0_#in~d.base_BEFORE_CALL_11| Int) (|v_func_to_recursive_line_31_to_38_0_#in~B.base_BEFORE_CALL_10| Int) (|v_func_to_recursive_line_31_to_38_0_#in~p.base_BEFORE_CALL_8| Int) (|v_func_to_recursive_line_31_to_38_0_#in~p.offset_BEFORE_CALL_8| Int) (|v_func_to_recursive_line_31_to_38_0_#in~d.offset_BEFORE_CALL_11| Int)) (= (mod (* (select (select |c_#memory_int#0| |v_func_to_recursive_line_31_to_38_0_#in~B.base_BEFORE_CALL_10|) |v_func_to_recursive_line_31_to_38_0_#in~B.offset_BEFORE_CALL_10|) (select (select |c_#memory_int#4| |v_func_to_recursive_line_31_to_38_0_#in~p.base_BEFORE_CALL_8|) |v_func_to_recursive_line_31_to_38_0_#in~p.offset_BEFORE_CALL_8|)) 4294967296) (mod (select (select |c_#memory_int#3| |v_func_to_recursive_line_31_to_38_0_#in~d.base_BEFORE_CALL_11|) |v_func_to_recursive_line_31_to_38_0_#in~d.offset_BEFORE_CALL_11|) 4294967296)))) (forall ((|v_func_to_recursive_line_31_to_38_0_#in~B.offset_BEFORE_CALL_10| Int) (|v_func_to_recursive_line_31_to_38_0_#in~d.base_BEFORE_CALL_11| Int) (|v_func_to_recursive_line_31_to_38_0_#in~B.base_BEFORE_CALL_10| Int) (|v_func_to_recursive_line_31_to_38_0_#in~p.base_BEFORE_CALL_8| Int) (|v_func_to_recursive_line_31_to_38_0_#in~p.offset_BEFORE_CALL_8| Int) (|v_func_to_recursive_line_31_to_38_0_#in~d.offset_BEFORE_CALL_11| Int)) (let ((.cse0 (select (select |c_#memory_int#0| |v_func_to_recursive_line_31_to_38_0_#in~B.base_BEFORE_CALL_10|) |v_func_to_recursive_line_31_to_38_0_#in~B.offset_BEFORE_CALL_10|))) (or (not (= (mod (select (select |c_old(#memory_int#3)| |v_func_to_recursive_line_31_to_38_0_#in~d.base_BEFORE_CALL_11|) |v_func_to_recursive_line_31_to_38_0_#in~d.offset_BEFORE_CALL_11|) 4294967296) (mod (* (select (select |c_old(#memory_int#4)| |v_func_to_recursive_line_31_to_38_0_#in~p.base_BEFORE_CALL_8|) |v_func_to_recursive_line_31_to_38_0_#in~p.offset_BEFORE_CALL_8|) .cse0) 4294967296))) (= (mod (* .cse0 (select (select |c_#memory_int#4| |v_func_to_recursive_line_31_to_38_0_#in~p.base_BEFORE_CALL_8|) |v_func_to_recursive_line_31_to_38_0_#in~p.offset_BEFORE_CALL_8|)) 4294967296) (mod (select (select |c_#memory_int#3| |v_func_to_recursive_line_31_to_38_0_#in~d.base_BEFORE_CALL_11|) |v_func_to_recursive_line_31_to_38_0_#in~d.offset_BEFORE_CALL_11|) 4294967296)))))) is different from false [2024-11-08 15:26:42,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 15:26:42,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32885104] [2024-11-08 15:26:42,391 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-08 15:26:42,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202537267] [2024-11-08 15:26:42,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202537267] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 15:26:42,391 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-08 15:26:42,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2024-11-08 15:26:42,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223864426] [2024-11-08 15:26:42,391 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-08 15:26:42,392 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-08 15:26:42,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 15:26:42,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-08 15:26:42,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=528, Unknown=3, NotChecked=46, Total=650 [2024-11-08 15:26:42,393 INFO L87 Difference]: Start difference. First operand 107 states and 120 transitions. Second operand has 18 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 8 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2024-11-08 15:26:46,254 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.98s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-08 15:26:49,597 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers []