./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursified_nla-digbench/recursified_egcd-ll.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8be7027f Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursified_nla-digbench/recursified_egcd-ll.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 494d69f416dd1b0b56dc0371ee72744b83dbc298da37778d271d6f779b4cdcdc --- Real Ultimate output --- This is Ultimate 0.2.5-wip.dk.perfect-tracechecks-8be7027-m [2024-11-11 21:03:22,464 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-11 21:03:22,540 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-11 21:03:22,545 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-11 21:03:22,545 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-11 21:03:22,569 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-11 21:03:22,570 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-11 21:03:22,571 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-11 21:03:22,572 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-11 21:03:22,573 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-11 21:03:22,573 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-11 21:03:22,574 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-11 21:03:22,574 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-11 21:03:22,575 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-11 21:03:22,575 INFO L153 SettingsManager]: * Use SBE=true [2024-11-11 21:03:22,575 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-11 21:03:22,576 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-11 21:03:22,579 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-11 21:03:22,579 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-11 21:03:22,579 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-11 21:03:22,580 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-11 21:03:22,580 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-11 21:03:22,581 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-11 21:03:22,581 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-11 21:03:22,585 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-11 21:03:22,585 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-11 21:03:22,586 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-11 21:03:22,586 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-11 21:03:22,586 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-11 21:03:22,586 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-11 21:03:22,587 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-11 21:03:22,587 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-11 21:03:22,587 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-11 21:03:22,587 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-11 21:03:22,588 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-11 21:03:22,588 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-11 21:03:22,588 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-11 21:03:22,588 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-11 21:03:22,588 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-11 21:03:22,589 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-11 21:03:22,589 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-11 21:03:22,591 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-11 21:03:22,591 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 494d69f416dd1b0b56dc0371ee72744b83dbc298da37778d271d6f779b4cdcdc [2024-11-11 21:03:22,851 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-11 21:03:22,878 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-11 21:03:22,884 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-11 21:03:22,886 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-11 21:03:22,887 INFO L274 PluginConnector]: CDTParser initialized [2024-11-11 21:03:22,888 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursified_nla-digbench/recursified_egcd-ll.c [2024-11-11 21:03:24,323 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-11 21:03:24,509 INFO L384 CDTParser]: Found 1 translation units. [2024-11-11 21:03:24,509 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursified_nla-digbench/recursified_egcd-ll.c [2024-11-11 21:03:24,516 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dd1d3a764/e7311fb55e044cc68245e739be954ffb/FLAGe26131c52 [2024-11-11 21:03:24,528 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dd1d3a764/e7311fb55e044cc68245e739be954ffb [2024-11-11 21:03:24,531 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-11 21:03:24,532 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-11 21:03:24,533 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-11 21:03:24,534 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-11 21:03:24,539 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-11 21:03:24,540 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.11 09:03:24" (1/1) ... [2024-11-11 21:03:24,542 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a08edf8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 09:03:24, skipping insertion in model container [2024-11-11 21:03:24,543 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.11 09:03:24" (1/1) ... [2024-11-11 21:03:24,568 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-11 21:03:24,773 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursified_nla-digbench/recursified_egcd-ll.c[1019,1032] [2024-11-11 21:03:24,808 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-11 21:03:24,822 INFO L200 MainTranslator]: Completed pre-run [2024-11-11 21:03:24,835 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursified_nla-digbench/recursified_egcd-ll.c[1019,1032] [2024-11-11 21:03:24,854 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-11 21:03:24,877 INFO L204 MainTranslator]: Completed translation [2024-11-11 21:03:24,878 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 09:03:24 WrapperNode [2024-11-11 21:03:24,878 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-11 21:03:24,879 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-11 21:03:24,880 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-11 21:03:24,880 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-11 21:03:24,887 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 09:03:24" (1/1) ... [2024-11-11 21:03:24,897 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 09:03:24" (1/1) ... [2024-11-11 21:03:24,930 INFO L138 Inliner]: procedures = 16, calls = 106, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 112 [2024-11-11 21:03:24,931 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-11 21:03:24,932 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-11 21:03:24,932 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-11 21:03:24,932 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-11 21:03:24,943 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 09:03:24" (1/1) ... [2024-11-11 21:03:24,943 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 09:03:24" (1/1) ... [2024-11-11 21:03:24,946 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 09:03:24" (1/1) ... [2024-11-11 21:03:24,972 INFO L175 MemorySlicer]: Split 66 memory accesses to 9 slices as follows [2, 8, 8, 10, 8, 8, 8, 7, 7]. 15 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0, 0, 0, 0, 0]. The 14 writes are split as follows [0, 2, 2, 2, 2, 2, 2, 1, 1]. [2024-11-11 21:03:24,973 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 09:03:24" (1/1) ... [2024-11-11 21:03:24,973 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 09:03:24" (1/1) ... [2024-11-11 21:03:24,987 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 09:03:24" (1/1) ... [2024-11-11 21:03:24,989 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 09:03:24" (1/1) ... [2024-11-11 21:03:24,992 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 09:03:24" (1/1) ... [2024-11-11 21:03:24,997 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 09:03:24" (1/1) ... [2024-11-11 21:03:25,001 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-11 21:03:25,005 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-11 21:03:25,005 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-11 21:03:25,005 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-11 21:03:25,006 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 09:03:24" (1/1) ... [2024-11-11 21:03:25,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-11 21:03:25,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 21:03:25,040 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) [2024-11-11 21:03:25,043 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 [2024-11-11 21:03:25,085 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-11 21:03:25,086 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_33_to_48_0 [2024-11-11 21:03:25,086 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_33_to_48_0 [2024-11-11 21:03:25,086 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-11 21:03:25,086 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-11 21:03:25,087 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-11 21:03:25,087 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-11 21:03:25,088 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-11 21:03:25,088 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-11-11 21:03:25,089 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-11-11 21:03:25,089 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-11-11 21:03:25,089 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2024-11-11 21:03:25,089 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#7 [2024-11-11 21:03:25,090 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#8 [2024-11-11 21:03:25,090 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-11 21:03:25,090 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-11 21:03:25,090 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-11 21:03:25,090 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-11 21:03:25,091 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-11-11 21:03:25,091 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-11-11 21:03:25,091 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-11-11 21:03:25,091 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#6 [2024-11-11 21:03:25,092 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#7 [2024-11-11 21:03:25,092 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#8 [2024-11-11 21:03:25,092 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-11 21:03:25,093 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-11 21:03:25,093 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-11 21:03:25,093 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-11 21:03:25,094 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-11 21:03:25,094 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-11-11 21:03:25,094 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-11-11 21:03:25,094 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-11-11 21:03:25,094 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2024-11-11 21:03:25,095 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#7 [2024-11-11 21:03:25,095 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#8 [2024-11-11 21:03:25,095 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-11 21:03:25,095 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-11 21:03:25,096 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-11 21:03:25,231 INFO L238 CfgBuilder]: Building ICFG [2024-11-11 21:03:25,234 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-11 21:03:25,499 INFO L? ?]: Removed 13 outVars from TransFormulas that were not future-live. [2024-11-11 21:03:25,499 INFO L287 CfgBuilder]: Performing block encoding [2024-11-11 21:03:25,514 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-11 21:03:25,515 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-11 21:03:25,515 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.11 09:03:25 BoogieIcfgContainer [2024-11-11 21:03:25,515 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-11 21:03:25,519 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-11 21:03:25,520 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-11 21:03:25,524 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-11 21:03:25,525 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.11 09:03:24" (1/3) ... [2024-11-11 21:03:25,526 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4966ce09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.11 09:03:25, skipping insertion in model container [2024-11-11 21:03:25,526 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 09:03:24" (2/3) ... [2024-11-11 21:03:25,526 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4966ce09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.11 09:03:25, skipping insertion in model container [2024-11-11 21:03:25,526 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.11 09:03:25" (3/3) ... [2024-11-11 21:03:25,528 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_egcd-ll.c [2024-11-11 21:03:25,544 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-11 21:03:25,545 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-11 21:03:25,617 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-11 21:03:25,623 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;@1e88bbc1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-11 21:03:25,625 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-11 21:03:25,630 INFO L276 IsEmpty]: Start isEmpty. Operand has 42 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 28 states have internal predecessors, (32), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-11-11 21:03:25,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-11 21:03:25,636 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 21:03:25,636 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 21:03:25,637 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 21:03:25,641 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 21:03:25,641 INFO L85 PathProgramCache]: Analyzing trace with hash -1587638685, now seen corresponding path program 1 times [2024-11-11 21:03:25,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 21:03:25,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643846776] [2024-11-11 21:03:25,650 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 21:03:25,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 21:03:25,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:03:25,913 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 21:03:25,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:03:25,927 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-11 21:03:25,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:03:25,937 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-11 21:03:25,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 21:03:25,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643846776] [2024-11-11 21:03:25,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643846776] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-11 21:03:25,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-11 21:03:25,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-11 21:03:25,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61491401] [2024-11-11 21:03:25,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-11 21:03:25,947 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-11 21:03:25,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 21:03:25,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-11 21:03:25,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-11 21:03:25,976 INFO L87 Difference]: Start difference. First operand has 42 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 28 states have internal predecessors, (32), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-11 21:03:25,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 21:03:25,997 INFO L93 Difference]: Finished difference Result 81 states and 115 transitions. [2024-11-11 21:03:25,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-11 21:03:25,999 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2024-11-11 21:03:26,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 21:03:26,006 INFO L225 Difference]: With dead ends: 81 [2024-11-11 21:03:26,006 INFO L226 Difference]: Without dead ends: 38 [2024-11-11 21:03:26,009 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-11 21:03:26,013 INFO L435 NwaCegarLoop]: 51 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-11 21:03:26,013 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-11 21:03:26,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2024-11-11 21:03:26,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2024-11-11 21:03:26,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 25 states have internal predecessors, (26), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-11 21:03:26,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 47 transitions. [2024-11-11 21:03:26,093 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 47 transitions. Word has length 21 [2024-11-11 21:03:26,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 21:03:26,093 INFO L471 AbstractCegarLoop]: Abstraction has 38 states and 47 transitions. [2024-11-11 21:03:26,093 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-11 21:03:26,094 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 47 transitions. [2024-11-11 21:03:26,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-11 21:03:26,095 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 21:03:26,095 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 21:03:26,095 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-11 21:03:26,099 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 21:03:26,100 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 21:03:26,100 INFO L85 PathProgramCache]: Analyzing trace with hash 1820045287, now seen corresponding path program 1 times [2024-11-11 21:03:26,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 21:03:26,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759628866] [2024-11-11 21:03:26,101 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 21:03:26,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 21:03:26,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-11 21:03:26,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [725053823] [2024-11-11 21:03:26,221 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 21:03:26,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 21:03:26,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 21:03:26,225 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) [2024-11-11 21:03:26,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-11 21:03:26,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:03:26,368 INFO L256 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 61 conjuncts are in the unsatisfiable core [2024-11-11 21:03:26,374 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 21:03:26,439 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 [2024-11-11 21:03:26,450 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 [2024-11-11 21:03:26,464 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 [2024-11-11 21:03:26,477 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 [2024-11-11 21:03:26,694 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-11 21:03:26,694 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-11 21:03:26,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 21:03:26,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759628866] [2024-11-11 21:03:26,696 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-11 21:03:26,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725053823] [2024-11-11 21:03:26,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725053823] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-11 21:03:26,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-11 21:03:26,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-11 21:03:26,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013671991] [2024-11-11 21:03:26,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-11 21:03:26,701 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-11 21:03:26,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 21:03:26,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-11 21:03:26,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-11-11 21:03:26,703 INFO L87 Difference]: Start difference. First operand 38 states and 47 transitions. Second operand has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-11 21:03:27,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 21:03:27,008 INFO L93 Difference]: Finished difference Result 61 states and 76 transitions. [2024-11-11 21:03:27,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-11 21:03:27,008 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 21 [2024-11-11 21:03:27,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 21:03:27,010 INFO L225 Difference]: With dead ends: 61 [2024-11-11 21:03:27,010 INFO L226 Difference]: Without dead ends: 59 [2024-11-11 21:03:27,011 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-11-11 21:03:27,012 INFO L435 NwaCegarLoop]: 35 mSDtfsCounter, 20 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-11 21:03:27,012 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 209 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-11 21:03:27,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-11-11 21:03:27,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 53. [2024-11-11 21:03:27,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 33 states have (on average 1.121212121212121) internal successors, (37), 35 states have internal predecessors, (37), 14 states have call successors, (14), 5 states have call predecessors, (14), 5 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) [2024-11-11 21:03:27,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 65 transitions. [2024-11-11 21:03:27,034 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 65 transitions. Word has length 21 [2024-11-11 21:03:27,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 21:03:27,035 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 65 transitions. [2024-11-11 21:03:27,035 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-11 21:03:27,036 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 65 transitions. [2024-11-11 21:03:27,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-11 21:03:27,037 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 21:03:27,037 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 21:03:27,056 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-11 21:03:27,241 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 21:03:27,242 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 21:03:27,242 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 21:03:27,243 INFO L85 PathProgramCache]: Analyzing trace with hash -2119093344, now seen corresponding path program 1 times [2024-11-11 21:03:27,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 21:03:27,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61884861] [2024-11-11 21:03:27,243 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 21:03:27,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 21:03:27,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-11 21:03:27,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [267521834] [2024-11-11 21:03:27,312 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 21:03:27,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 21:03:27,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 21:03:27,314 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) [2024-11-11 21:03:27,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-11 21:03:27,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:03:27,459 INFO L256 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 73 conjuncts are in the unsatisfiable core [2024-11-11 21:03:27,463 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 21:03:27,473 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 [2024-11-11 21:03:27,479 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 [2024-11-11 21:03:27,493 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 [2024-11-11 21:03:27,499 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 [2024-11-11 21:03:27,506 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 [2024-11-11 21:03:27,867 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-11-11 21:03:27,874 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 [2024-11-11 21:03:27,879 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 [2024-11-11 21:03:27,928 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-11 21:03:27,929 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 21:03:28,151 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-11 21:03:28,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 21:03:28,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61884861] [2024-11-11 21:03:28,151 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-11 21:03:28,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267521834] [2024-11-11 21:03:28,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267521834] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-11 21:03:28,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-11 21:03:28,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 13 [2024-11-11 21:03:28,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083386275] [2024-11-11 21:03:28,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-11 21:03:28,152 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-11 21:03:28,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 21:03:28,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-11 21:03:28,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-11-11 21:03:28,154 INFO L87 Difference]: Start difference. First operand 53 states and 65 transitions. Second operand has 8 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-11 21:03:32,522 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2024-11-11 21:03:32,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 21:03:32,744 INFO L93 Difference]: Finished difference Result 75 states and 93 transitions. [2024-11-11 21:03:32,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-11 21:03:32,745 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2024-11-11 21:03:32,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 21:03:32,748 INFO L225 Difference]: With dead ends: 75 [2024-11-11 21:03:32,748 INFO L226 Difference]: Without dead ends: 73 [2024-11-11 21:03:32,749 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2024-11-11 21:03:32,750 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 20 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2024-11-11 21:03:32,750 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 220 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 139 Invalid, 1 Unknown, 0 Unchecked, 4.4s Time] [2024-11-11 21:03:32,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2024-11-11 21:03:32,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2024-11-11 21:03:32,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 45 states have (on average 1.1333333333333333) internal successors, (51), 48 states have internal predecessors, (51), 18 states have call successors, (18), 7 states have call predecessors, (18), 8 states have return successors, (21), 17 states have call predecessors, (21), 17 states have call successors, (21) [2024-11-11 21:03:32,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 90 transitions. [2024-11-11 21:03:32,767 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 90 transitions. Word has length 27 [2024-11-11 21:03:32,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 21:03:32,767 INFO L471 AbstractCegarLoop]: Abstraction has 72 states and 90 transitions. [2024-11-11 21:03:32,767 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-11 21:03:32,768 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 90 transitions. [2024-11-11 21:03:32,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-11 21:03:32,768 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 21:03:32,769 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 21:03:32,787 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-11 21:03:32,972 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2024-11-11 21:03:32,973 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 21:03:32,974 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 21:03:32,974 INFO L85 PathProgramCache]: Analyzing trace with hash 694161815, now seen corresponding path program 1 times [2024-11-11 21:03:32,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 21:03:32,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884291921] [2024-11-11 21:03:32,974 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 21:03:32,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 21:03:33,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-11 21:03:33,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1588828050] [2024-11-11 21:03:33,026 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 21:03:33,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 21:03:33,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 21:03:33,028 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) [2024-11-11 21:03:33,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-11 21:03:33,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:03:33,164 INFO L256 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 57 conjuncts are in the unsatisfiable core [2024-11-11 21:03:33,168 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 21:03:33,172 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 [2024-11-11 21:03:33,180 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 [2024-11-11 21:03:33,185 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 [2024-11-11 21:03:33,192 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 [2024-11-11 21:03:33,476 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 [2024-11-11 21:03:33,481 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 [2024-11-11 21:03:33,522 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-11 21:03:33,522 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 21:03:33,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 21:03:33,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884291921] [2024-11-11 21:03:33,637 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-11 21:03:33,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588828050] [2024-11-11 21:03:33,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588828050] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 21:03:33,638 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-11 21:03:33,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2024-11-11 21:03:33,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461026619] [2024-11-11 21:03:33,638 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-11 21:03:33,639 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-11 21:03:33,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 21:03:33,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-11 21:03:33,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-11-11 21:03:33,640 INFO L87 Difference]: Start difference. First operand 72 states and 90 transitions. Second operand has 9 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-11 21:03:33,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 21:03:33,998 INFO L93 Difference]: Finished difference Result 121 states and 151 transitions. [2024-11-11 21:03:33,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-11 21:03:33,999 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 33 [2024-11-11 21:03:33,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 21:03:34,001 INFO L225 Difference]: With dead ends: 121 [2024-11-11 21:03:34,001 INFO L226 Difference]: Without dead ends: 119 [2024-11-11 21:03:34,001 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2024-11-11 21:03:34,002 INFO L435 NwaCegarLoop]: 29 mSDtfsCounter, 45 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-11 21:03:34,003 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 169 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-11 21:03:34,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2024-11-11 21:03:34,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 108. [2024-11-11 21:03:34,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 68 states have (on average 1.1470588235294117) internal successors, (78), 72 states have internal predecessors, (78), 26 states have call successors, (26), 11 states have call predecessors, (26), 13 states have return successors, (31), 25 states have call predecessors, (31), 24 states have call successors, (31) [2024-11-11 21:03:34,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 135 transitions. [2024-11-11 21:03:34,025 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 135 transitions. Word has length 33 [2024-11-11 21:03:34,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 21:03:34,026 INFO L471 AbstractCegarLoop]: Abstraction has 108 states and 135 transitions. [2024-11-11 21:03:34,026 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-11 21:03:34,026 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 135 transitions. [2024-11-11 21:03:34,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-11 21:03:34,027 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 21:03:34,027 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 21:03:34,046 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-11 21:03:34,231 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 21:03:34,232 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 21:03:34,232 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 21:03:34,232 INFO L85 PathProgramCache]: Analyzing trace with hash 1798714572, now seen corresponding path program 1 times [2024-11-11 21:03:34,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 21:03:34,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344339921] [2024-11-11 21:03:34,233 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 21:03:34,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 21:03:34,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:03:34,625 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 21:03:34,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:03:34,628 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-11 21:03:34,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:03:34,646 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-11-11 21:03:34,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:03:34,785 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 21:03:34,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:03:34,792 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-11 21:03:34,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:03:34,798 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-11-11 21:03:34,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:03:34,805 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-11 21:03:34,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 21:03:34,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344339921] [2024-11-11 21:03:34,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344339921] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-11 21:03:34,806 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-11 21:03:34,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-11-11 21:03:34,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481769883] [2024-11-11 21:03:34,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-11 21:03:34,807 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-11 21:03:34,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 21:03:34,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-11 21:03:34,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2024-11-11 21:03:34,808 INFO L87 Difference]: Start difference. First operand 108 states and 135 transitions. Second operand has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-11 21:03:35,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 21:03:35,193 INFO L93 Difference]: Finished difference Result 120 states and 146 transitions. [2024-11-11 21:03:35,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-11 21:03:35,194 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 43 [2024-11-11 21:03:35,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 21:03:35,196 INFO L225 Difference]: With dead ends: 120 [2024-11-11 21:03:35,198 INFO L226 Difference]: Without dead ends: 118 [2024-11-11 21:03:35,199 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2024-11-11 21:03:35,199 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 26 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-11 21:03:35,200 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 125 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-11 21:03:35,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2024-11-11 21:03:35,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2024-11-11 21:03:35,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 75 states have (on average 1.1333333333333333) internal successors, (85), 79 states have internal predecessors, (85), 26 states have call successors, (26), 13 states have call predecessors, (26), 16 states have return successors, (32), 25 states have call predecessors, (32), 24 states have call successors, (32) [2024-11-11 21:03:35,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 143 transitions. [2024-11-11 21:03:35,228 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 143 transitions. Word has length 43 [2024-11-11 21:03:35,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 21:03:35,229 INFO L471 AbstractCegarLoop]: Abstraction has 118 states and 143 transitions. [2024-11-11 21:03:35,229 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-11 21:03:35,229 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 143 transitions. [2024-11-11 21:03:35,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-11 21:03:35,230 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 21:03:35,231 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 21:03:35,231 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-11 21:03:35,231 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 21:03:35,231 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 21:03:35,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1804783998, now seen corresponding path program 1 times [2024-11-11 21:03:35,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 21:03:35,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050752545] [2024-11-11 21:03:35,232 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 21:03:35,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 21:03:35,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-11 21:03:35,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1760646474] [2024-11-11 21:03:35,297 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 21:03:35,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 21:03:35,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 21:03:35,299 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) [2024-11-11 21:03:35,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-11 21:03:35,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:03:35,458 INFO L256 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 107 conjuncts are in the unsatisfiable core [2024-11-11 21:03:35,463 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 21:03:35,495 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 [2024-11-11 21:03:35,503 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 [2024-11-11 21:03:35,511 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 [2024-11-11 21:03:35,517 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 [2024-11-11 21:03:35,914 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2024-11-11 21:03:35,926 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-11 21:03:36,051 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-11 21:03:36,051 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 21:03:36,525 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-11 21:03:36,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 21:03:36,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050752545] [2024-11-11 21:03:36,527 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-11 21:03:36,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760646474] [2024-11-11 21:03:36,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760646474] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 21:03:36,528 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-11 21:03:36,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 15 [2024-11-11 21:03:36,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654795674] [2024-11-11 21:03:36,528 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-11 21:03:36,529 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-11 21:03:36,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 21:03:36,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-11 21:03:36,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2024-11-11 21:03:36,530 INFO L87 Difference]: Start difference. First operand 118 states and 143 transitions. Second operand has 15 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 8 states have call successors, (14), 6 states have call predecessors, (14), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2024-11-11 21:03:37,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 21:03:37,684 INFO L93 Difference]: Finished difference Result 171 states and 215 transitions. [2024-11-11 21:03:37,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-11 21:03:37,686 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 8 states have call successors, (14), 6 states have call predecessors, (14), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 44 [2024-11-11 21:03:37,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 21:03:37,693 INFO L225 Difference]: With dead ends: 171 [2024-11-11 21:03:37,694 INFO L226 Difference]: Without dead ends: 169 [2024-11-11 21:03:37,695 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 66 SyntacticMatches, 7 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2024-11-11 21:03:37,697 INFO L435 NwaCegarLoop]: 39 mSDtfsCounter, 60 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-11 21:03:37,700 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 303 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 373 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-11 21:03:37,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2024-11-11 21:03:37,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 164. [2024-11-11 21:03:37,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 104 states have (on average 1.1153846153846154) internal successors, (116), 109 states have internal predecessors, (116), 34 states have call successors, (34), 19 states have call predecessors, (34), 25 states have return successors, (48), 35 states have call predecessors, (48), 31 states have call successors, (48) [2024-11-11 21:03:37,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 198 transitions. [2024-11-11 21:03:37,760 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 198 transitions. Word has length 44 [2024-11-11 21:03:37,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 21:03:37,761 INFO L471 AbstractCegarLoop]: Abstraction has 164 states and 198 transitions. [2024-11-11 21:03:37,761 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 8 states have call successors, (14), 6 states have call predecessors, (14), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2024-11-11 21:03:37,761 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 198 transitions. [2024-11-11 21:03:37,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-11 21:03:37,762 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 21:03:37,762 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 21:03:37,785 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-11 21:03:37,963 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 [2024-11-11 21:03:37,964 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 21:03:37,964 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 21:03:37,965 INFO L85 PathProgramCache]: Analyzing trace with hash 795700175, now seen corresponding path program 1 times [2024-11-11 21:03:37,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 21:03:37,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791404145] [2024-11-11 21:03:37,965 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 21:03:37,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 21:03:38,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-11 21:03:38,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1173636669] [2024-11-11 21:03:38,008 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 21:03:38,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 21:03:38,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 21:03:38,011 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) [2024-11-11 21:03:38,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-11 21:03:38,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:03:38,153 INFO L256 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-11-11 21:03:38,159 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 21:03:38,172 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 [2024-11-11 21:03:38,182 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 [2024-11-11 21:03:38,187 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 [2024-11-11 21:03:38,192 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 [2024-11-11 21:03:38,199 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 [2024-11-11 21:03:38,225 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 [2024-11-11 21:03:38,229 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 [2024-11-11 21:03:38,339 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 [2024-11-11 21:03:38,540 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-11 21:03:38,540 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 37 [2024-11-11 21:03:38,552 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-11 21:03:38,553 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 38 [2024-11-11 21:03:38,557 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 34 [2024-11-11 21:03:38,611 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-11 21:03:38,611 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 21:04:02,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 21:04:02,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791404145] [2024-11-11 21:04:02,749 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-11 21:04:02,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173636669] [2024-11-11 21:04:02,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173636669] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 21:04:02,750 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-11 21:04:02,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2024-11-11 21:04:02,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566002173] [2024-11-11 21:04:02,751 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-11 21:04:02,752 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-11 21:04:02,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 21:04:02,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-11 21:04:02,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=282, Unknown=5, NotChecked=0, Total=342 [2024-11-11 21:04:02,754 INFO L87 Difference]: Start difference. First operand 164 states and 198 transitions. Second operand has 12 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2024-11-11 21:04:15,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 21:04:15,047 INFO L93 Difference]: Finished difference Result 172 states and 204 transitions. [2024-11-11 21:04:15,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-11 21:04:15,048 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 49 [2024-11-11 21:04:15,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 21:04:15,051 INFO L225 Difference]: With dead ends: 172 [2024-11-11 21:04:15,051 INFO L226 Difference]: Without dead ends: 170 [2024-11-11 21:04:15,052 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 27.1s TimeCoverageRelationStatistics Valid=120, Invalid=525, Unknown=5, NotChecked=0, Total=650 [2024-11-11 21:04:15,052 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 32 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 374 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.8s IncrementalHoareTripleChecker+Time [2024-11-11 21:04:15,053 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 112 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 374 Invalid, 0 Unknown, 0 Unchecked, 7.8s Time] [2024-11-11 21:04:15,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2024-11-11 21:04:15,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 168. [2024-11-11 21:04:15,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 107 states have (on average 1.1121495327102804) internal successors, (119), 112 states have internal predecessors, (119), 34 states have call successors, (34), 20 states have call predecessors, (34), 26 states have return successors, (48), 35 states have call predecessors, (48), 31 states have call successors, (48) [2024-11-11 21:04:15,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 201 transitions. [2024-11-11 21:04:15,096 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 201 transitions. Word has length 49 [2024-11-11 21:04:15,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 21:04:15,096 INFO L471 AbstractCegarLoop]: Abstraction has 168 states and 201 transitions. [2024-11-11 21:04:15,096 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2024-11-11 21:04:15,096 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 201 transitions. [2024-11-11 21:04:15,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-11 21:04:15,097 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 21:04:15,097 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 21:04:15,117 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-11 21:04:15,298 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 21:04:15,298 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 21:04:15,299 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 21:04:15,299 INFO L85 PathProgramCache]: Analyzing trace with hash -1989012997, now seen corresponding path program 2 times [2024-11-11 21:04:15,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 21:04:15,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442262671] [2024-11-11 21:04:15,299 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 21:04:15,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 21:04:15,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-11 21:04:15,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1660298624] [2024-11-11 21:04:15,355 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-11 21:04:15,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 21:04:15,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 21:04:15,357 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-11 21:04:15,359 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-11 21:04:15,543 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-11 21:04:15,543 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-11 21:04:15,552 INFO L256 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 169 conjuncts are in the unsatisfiable core [2024-11-11 21:04:15,561 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 21:04:15,608 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 [2024-11-11 21:04:15,646 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 [2024-11-11 21:04:15,694 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 [2024-11-11 21:04:15,789 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 [2024-11-11 21:04:15,868 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 [2024-11-11 21:04:15,945 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 [2024-11-11 21:04:16,023 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 [2024-11-11 21:04:16,113 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 [2024-11-11 21:04:23,954 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-11 21:04:24,026 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2024-11-11 21:04:24,063 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 [2024-11-11 21:04:24,137 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2024-11-11 21:04:26,416 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 [2024-11-11 21:04:26,455 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2024-11-11 21:04:26,493 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-11-11 21:04:27,836 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-11 21:04:27,836 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 21:04:32,796 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-11 21:04:32,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 21:04:32,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442262671] [2024-11-11 21:04:32,797 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-11 21:04:32,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660298624] [2024-11-11 21:04:32,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660298624] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 21:04:32,797 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-11 21:04:32,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 18 [2024-11-11 21:04:32,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069479625] [2024-11-11 21:04:32,797 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-11 21:04:32,798 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-11 21:04:32,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 21:04:32,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-11 21:04:32,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2024-11-11 21:04:32,799 INFO L87 Difference]: Start difference. First operand 168 states and 201 transitions. Second operand has 18 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 9 states have call successors, (16), 8 states have call predecessors, (16), 3 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10)