./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursified_nla-digbench/recursified_mannadiv.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4a390ef5 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursified_nla-digbench/recursified_mannadiv.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 305ef194ca8c72f4da0a6deb18ed40b72305718d65c18a21aa3fcb3830c499e5 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4a390ef-m [2024-10-24 01:11:50,298 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-24 01:11:50,354 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-24 01:11:50,360 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-24 01:11:50,360 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-24 01:11:50,387 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-24 01:11:50,387 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-24 01:11:50,388 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-24 01:11:50,388 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-24 01:11:50,389 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-24 01:11:50,390 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-24 01:11:50,391 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-24 01:11:50,392 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-24 01:11:50,392 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-24 01:11:50,392 INFO L153 SettingsManager]: * Use SBE=true [2024-10-24 01:11:50,392 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-24 01:11:50,393 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-24 01:11:50,393 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-24 01:11:50,393 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-24 01:11:50,394 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-24 01:11:50,394 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-24 01:11:50,394 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-24 01:11:50,395 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-24 01:11:50,395 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-24 01:11:50,395 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-24 01:11:50,396 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-24 01:11:50,396 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-24 01:11:50,396 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-24 01:11:50,397 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-24 01:11:50,397 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-24 01:11:50,397 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-24 01:11:50,397 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-24 01:11:50,398 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 01:11:50,398 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-24 01:11:50,398 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-24 01:11:50,399 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-24 01:11:50,399 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-24 01:11:50,399 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-24 01:11:50,399 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-24 01:11:50,400 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-24 01:11:50,400 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-24 01:11:50,401 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-24 01:11:50,401 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 305ef194ca8c72f4da0a6deb18ed40b72305718d65c18a21aa3fcb3830c499e5 [2024-10-24 01:11:50,602 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-24 01:11:50,618 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-24 01:11:50,621 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-24 01:11:50,622 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-24 01:11:50,622 INFO L274 PluginConnector]: CDTParser initialized [2024-10-24 01:11:50,623 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursified_nla-digbench/recursified_mannadiv.c [2024-10-24 01:11:51,850 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-24 01:11:52,015 INFO L384 CDTParser]: Found 1 translation units. [2024-10-24 01:11:52,016 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursified_nla-digbench/recursified_mannadiv.c [2024-10-24 01:11:52,022 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b9ead40db/6f30a81c6b3c4958be7f6a2a924c3fce/FLAG4d0e7bcaf [2024-10-24 01:11:52,031 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b9ead40db/6f30a81c6b3c4958be7f6a2a924c3fce [2024-10-24 01:11:52,033 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-24 01:11:52,034 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-24 01:11:52,035 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-24 01:11:52,035 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-24 01:11:52,040 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-24 01:11:52,041 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 01:11:52" (1/1) ... [2024-10-24 01:11:52,042 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ac808fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:11:52, skipping insertion in model container [2024-10-24 01:11:52,042 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 01:11:52" (1/1) ... [2024-10-24 01:11:52,059 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-24 01:11:52,190 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursified_nla-digbench/recursified_mannadiv.c[1105,1118] [2024-10-24 01:11:52,209 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 01:11:52,219 INFO L200 MainTranslator]: Completed pre-run [2024-10-24 01:11:52,229 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursified_nla-digbench/recursified_mannadiv.c[1105,1118] [2024-10-24 01:11:52,242 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 01:11:52,261 INFO L204 MainTranslator]: Completed translation [2024-10-24 01:11:52,261 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:11:52 WrapperNode [2024-10-24 01:11:52,261 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-24 01:11:52,262 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-24 01:11:52,262 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-24 01:11:52,262 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-24 01:11:52,267 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:11:52" (1/1) ... [2024-10-24 01:11:52,274 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:11:52" (1/1) ... [2024-10-24 01:11:52,287 INFO L138 Inliner]: procedures = 16, calls = 57, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 65 [2024-10-24 01:11:52,288 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-24 01:11:52,288 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-24 01:11:52,288 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-24 01:11:52,288 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-24 01:11:52,296 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:11:52" (1/1) ... [2024-10-24 01:11:52,296 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:11:52" (1/1) ... [2024-10-24 01:11:52,297 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:11:52" (1/1) ... [2024-10-24 01:11:52,307 INFO L175 MemorySlicer]: Split 31 memory accesses to 6 slices as follows [2, 5, 7, 5, 5, 7]. 23 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0, 0]. The 10 writes are split as follows [0, 2, 3, 1, 1, 3]. [2024-10-24 01:11:52,308 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:11:52" (1/1) ... [2024-10-24 01:11:52,308 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:11:52" (1/1) ... [2024-10-24 01:11:52,313 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:11:52" (1/1) ... [2024-10-24 01:11:52,314 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:11:52" (1/1) ... [2024-10-24 01:11:52,316 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:11:52" (1/1) ... [2024-10-24 01:11:52,322 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:11:52" (1/1) ... [2024-10-24 01:11:52,324 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-24 01:11:52,325 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-24 01:11:52,325 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-24 01:11:52,325 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-24 01:11:52,326 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:11:52" (1/1) ... [2024-10-24 01:11:52,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 01:11:52,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 01:11:52,350 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-24 01:11:52,352 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-24 01:11:52,387 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-24 01:11:52,387 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-10-24 01:11:52,387 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-10-24 01:11:52,387 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-24 01:11:52,387 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-24 01:11:52,387 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-24 01:11:52,387 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-10-24 01:11:52,388 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-10-24 01:11:52,388 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-10-24 01:11:52,388 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-24 01:11:52,388 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-24 01:11:52,388 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-24 01:11:52,388 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-24 01:11:52,388 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-10-24 01:11:52,388 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-10-24 01:11:52,388 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-10-24 01:11:52,388 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_31_to_42_0 [2024-10-24 01:11:52,388 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_31_to_42_0 [2024-10-24 01:11:52,389 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-24 01:11:52,389 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-24 01:11:52,389 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-24 01:11:52,389 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-24 01:11:52,389 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-24 01:11:52,389 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-10-24 01:11:52,389 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-10-24 01:11:52,389 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-10-24 01:11:52,390 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-10-24 01:11:52,390 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-10-24 01:11:52,390 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-24 01:11:52,468 INFO L238 CfgBuilder]: Building ICFG [2024-10-24 01:11:52,470 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-24 01:11:52,644 INFO L? ?]: Removed 9 outVars from TransFormulas that were not future-live. [2024-10-24 01:11:52,644 INFO L287 CfgBuilder]: Performing block encoding [2024-10-24 01:11:52,666 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-24 01:11:52,666 INFO L314 CfgBuilder]: Removed 1 assume(true) statements. [2024-10-24 01:11:52,667 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 01:11:52 BoogieIcfgContainer [2024-10-24 01:11:52,667 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-24 01:11:52,669 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-24 01:11:52,669 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-24 01:11:52,671 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-24 01:11:52,671 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 01:11:52" (1/3) ... [2024-10-24 01:11:52,672 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@711d8e94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 01:11:52, skipping insertion in model container [2024-10-24 01:11:52,672 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:11:52" (2/3) ... [2024-10-24 01:11:52,673 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@711d8e94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 01:11:52, skipping insertion in model container [2024-10-24 01:11:52,673 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 01:11:52" (3/3) ... [2024-10-24 01:11:52,673 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_mannadiv.c [2024-10-24 01:11:52,685 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-24 01:11:52,686 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-24 01:11:52,723 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-24 01:11:52,728 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;@4d5373a8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-24 01:11:52,728 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-24 01:11:52,731 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 20 states have internal predecessors, (24), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-10-24 01:11:52,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-10-24 01:11:52,736 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 01:11:52,736 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 01:11:52,736 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 01:11:52,740 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 01:11:52,740 INFO L85 PathProgramCache]: Analyzing trace with hash 432807151, now seen corresponding path program 1 times [2024-10-24 01:11:52,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 01:11:52,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487747677] [2024-10-24 01:11:52,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 01:11:52,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 01:11:52,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 01:11:52,941 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 01:11:52,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 01:11:52,950 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-24 01:11:52,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 01:11:52,960 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-24 01:11:52,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 01:11:52,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487747677] [2024-10-24 01:11:52,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487747677] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 01:11:52,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 01:11:52,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-24 01:11:52,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168376492] [2024-10-24 01:11:52,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 01:11:52,968 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-24 01:11:52,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 01:11:52,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-24 01:11:52,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-24 01:11:52,991 INFO L87 Difference]: Start difference. First operand has 29 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 20 states have internal predecessors, (24), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 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) [2024-10-24 01:11:53,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 01:11:53,020 INFO L93 Difference]: Finished difference Result 56 states and 75 transitions. [2024-10-24 01:11:53,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-24 01:11:53,022 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 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 20 [2024-10-24 01:11:53,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 01:11:53,028 INFO L225 Difference]: With dead ends: 56 [2024-10-24 01:11:53,029 INFO L226 Difference]: Without dead ends: 27 [2024-10-24 01:11:53,033 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-24 01:11:53,036 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-24 01:11:53,038 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-24 01:11:53,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-10-24 01:11:53,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2024-10-24 01:11:53,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 19 states have internal predecessors, (20), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-10-24 01:11:53,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2024-10-24 01:11:53,071 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 20 [2024-10-24 01:11:53,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 01:11:53,071 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2024-10-24 01:11:53,072 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 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) [2024-10-24 01:11:53,072 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2024-10-24 01:11:53,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-10-24 01:11:53,073 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 01:11:53,073 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 01:11:53,074 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-24 01:11:53,074 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 01:11:53,074 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 01:11:53,074 INFO L85 PathProgramCache]: Analyzing trace with hash -454476173, now seen corresponding path program 1 times [2024-10-24 01:11:53,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 01:11:53,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512226369] [2024-10-24 01:11:53,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 01:11:53,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 01:11:53,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-24 01:11:53,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [359521012] [2024-10-24 01:11:53,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 01:11:53,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 01:11:53,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 01:11:53,143 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 01:11:53,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-24 01:11:53,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 01:11:53,243 INFO L255 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 57 conjuncts are in the unsatisfiable core [2024-10-24 01:11:53,252 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 01:11:53,323 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-24 01:11:53,339 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-24 01:11:53,348 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-24 01:11:53,355 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-24 01:11:53,446 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-24 01:11:53,449 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-10-24 01:11:53,483 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-24 01:11:53,484 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 01:11:53,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 01:11:53,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512226369] [2024-10-24 01:11:53,484 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-24 01:11:53,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359521012] [2024-10-24 01:11:53,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359521012] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 01:11:53,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 01:11:53,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-10-24 01:11:53,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298087175] [2024-10-24 01:11:53,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 01:11:53,486 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-24 01:11:53,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 01:11:53,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-24 01:11:53,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-10-24 01:11:53,487 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 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) [2024-10-24 01:11:53,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 01:11:53,621 INFO L93 Difference]: Finished difference Result 42 states and 48 transitions. [2024-10-24 01:11:53,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-24 01:11:53,622 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 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 20 [2024-10-24 01:11:53,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 01:11:53,624 INFO L225 Difference]: With dead ends: 42 [2024-10-24 01:11:53,624 INFO L226 Difference]: Without dead ends: 40 [2024-10-24 01:11:53,624 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-10-24 01:11:53,625 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 14 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 01:11:53,626 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 124 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 01:11:53,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2024-10-24 01:11:53,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2024-10-24 01:11:53,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 25 states have (on average 1.16) internal successors, (29), 27 states have internal predecessors, (29), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2024-10-24 01:11:53,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2024-10-24 01:11:53,636 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 20 [2024-10-24 01:11:53,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 01:11:53,636 INFO L471 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2024-10-24 01:11:53,636 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 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) [2024-10-24 01:11:53,637 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2024-10-24 01:11:53,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-10-24 01:11:53,637 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 01:11:53,638 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 01:11:53,653 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-24 01:11:53,838 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 01:11:53,839 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 01:11:53,840 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 01:11:53,840 INFO L85 PathProgramCache]: Analyzing trace with hash 443267008, now seen corresponding path program 1 times [2024-10-24 01:11:53,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 01:11:53,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007672034] [2024-10-24 01:11:53,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 01:11:53,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 01:11:53,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-24 01:11:53,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [810313654] [2024-10-24 01:11:53,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 01:11:53,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 01:11:53,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 01:11:53,874 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 01:11:53,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-24 01:11:53,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 01:11:53,950 INFO L255 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-10-24 01:11:53,953 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 01:11:53,966 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-24 01:11:53,971 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-24 01:11:53,980 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-24 01:11:54,010 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-24 01:11:54,200 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-24 01:11:54,200 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 01:11:54,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 01:11:54,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007672034] [2024-10-24 01:11:54,201 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-24 01:11:54,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810313654] [2024-10-24 01:11:54,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810313654] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 01:11:54,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 01:11:54,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-10-24 01:11:54,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047783391] [2024-10-24 01:11:54,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 01:11:54,202 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-24 01:11:54,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 01:11:54,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-24 01:11:54,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-10-24 01:11:54,204 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand has 11 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-10-24 01:11:54,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 01:11:54,510 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2024-10-24 01:11:54,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-24 01:11:54,510 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 30 [2024-10-24 01:11:54,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 01:11:54,512 INFO L225 Difference]: With dead ends: 48 [2024-10-24 01:11:54,513 INFO L226 Difference]: Without dead ends: 38 [2024-10-24 01:11:54,514 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2024-10-24 01:11:54,515 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 15 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-24 01:11:54,516 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 62 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-24 01:11:54,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2024-10-24 01:11:54,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2024-10-24 01:11:54,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 25 states have (on average 1.12) internal successors, (28), 26 states have internal predecessors, (28), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2024-10-24 01:11:54,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2024-10-24 01:11:54,523 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 30 [2024-10-24 01:11:54,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 01:11:54,523 INFO L471 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2024-10-24 01:11:54,524 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-10-24 01:11:54,524 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2024-10-24 01:11:54,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-10-24 01:11:54,526 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 01:11:54,526 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 01:11:54,539 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-24 01:11:54,727 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2024-10-24 01:11:54,728 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 01:11:54,728 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 01:11:54,728 INFO L85 PathProgramCache]: Analyzing trace with hash -746539634, now seen corresponding path program 1 times [2024-10-24 01:11:54,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 01:11:54,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172330883] [2024-10-24 01:11:54,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 01:11:54,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 01:11:54,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-24 01:11:54,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [427982157] [2024-10-24 01:11:54,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 01:11:54,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 01:11:54,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 01:11:54,778 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 01:11:54,779 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-24 01:11:54,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 01:11:54,867 INFO L255 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 129 conjuncts are in the unsatisfiable core [2024-10-24 01:11:54,871 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 01:11:54,875 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-24 01:11:54,876 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-24 01:11:54,880 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-24 01:11:54,883 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-24 01:11:54,888 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-24 01:11:55,029 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-24 01:11:55,034 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2024-10-24 01:11:55,040 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-24 01:11:55,113 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2024-10-24 01:11:55,116 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-10-24 01:11:55,155 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-24 01:11:55,155 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 01:11:55,503 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-24 01:11:55,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 01:11:55,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172330883] [2024-10-24 01:11:55,504 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-24 01:11:55,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427982157] [2024-10-24 01:11:55,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427982157] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 01:11:55,504 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-24 01:11:55,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2024-10-24 01:11:55,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245641484] [2024-10-24 01:11:55,505 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-24 01:11:55,506 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-24 01:11:55,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 01:11:55,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-24 01:11:55,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2024-10-24 01:11:55,508 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 19 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 9 states have call successors, (10), 7 states have call predecessors, (10), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-10-24 01:11:56,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 01:11:56,011 INFO L93 Difference]: Finished difference Result 59 states and 72 transitions. [2024-10-24 01:11:56,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-10-24 01:11:56,012 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 9 states have call successors, (10), 7 states have call predecessors, (10), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 31 [2024-10-24 01:11:56,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 01:11:56,013 INFO L225 Difference]: With dead ends: 59 [2024-10-24 01:11:56,013 INFO L226 Difference]: Without dead ends: 55 [2024-10-24 01:11:56,013 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=167, Invalid=763, Unknown=0, NotChecked=0, Total=930 [2024-10-24 01:11:56,014 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 71 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-24 01:11:56,014 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 181 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-24 01:11:56,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-10-24 01:11:56,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 51. [2024-10-24 01:11:56,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 35 states have internal predecessors, (38), 9 states have call successors, (9), 7 states have call predecessors, (9), 7 states have return successors, (11), 8 states have call predecessors, (11), 8 states have call successors, (11) [2024-10-24 01:11:56,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 58 transitions. [2024-10-24 01:11:56,031 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 58 transitions. Word has length 31 [2024-10-24 01:11:56,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 01:11:56,032 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 58 transitions. [2024-10-24 01:11:56,032 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 9 states have call successors, (10), 7 states have call predecessors, (10), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-10-24 01:11:56,032 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 58 transitions. [2024-10-24 01:11:56,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-10-24 01:11:56,033 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 01:11:56,033 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 01:11:56,047 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-24 01:11:56,237 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 01:11:56,238 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 01:11:56,238 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 01:11:56,238 INFO L85 PathProgramCache]: Analyzing trace with hash 230239702, now seen corresponding path program 1 times [2024-10-24 01:11:56,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 01:11:56,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451982133] [2024-10-24 01:11:56,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 01:11:56,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 01:11:56,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-24 01:11:56,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [862105705] [2024-10-24 01:11:56,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 01:11:56,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 01:11:56,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 01:11:56,279 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 01:11:56,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-24 01:11:56,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 01:11:56,370 INFO L255 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 106 conjuncts are in the unsatisfiable core [2024-10-24 01:11:56,376 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 01:11:56,380 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-24 01:11:56,432 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-24 01:11:56,436 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-24 01:11:56,443 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-24 01:11:56,475 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-24 01:11:56,885 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 13 treesize of output 9 [2024-10-24 01:11:57,137 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 11 [2024-10-24 01:11:57,146 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-24 01:11:57,245 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-24 01:11:57,245 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 01:11:57,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 01:11:57,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451982133] [2024-10-24 01:11:57,973 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-24 01:11:57,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862105705] [2024-10-24 01:11:57,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862105705] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 01:11:57,974 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-24 01:11:57,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2024-10-24 01:11:57,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170205914] [2024-10-24 01:11:57,974 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-24 01:11:57,974 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-24 01:11:57,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 01:11:57,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-24 01:11:57,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2024-10-24 01:11:57,975 INFO L87 Difference]: Start difference. First operand 51 states and 58 transitions. Second operand has 21 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2024-10-24 01:12:01,996 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-24 01:12:02,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 01:12:02,765 INFO L93 Difference]: Finished difference Result 64 states and 73 transitions. [2024-10-24 01:12:02,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-10-24 01:12:02,766 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) Word has length 43 [2024-10-24 01:12:02,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 01:12:02,771 INFO L225 Difference]: With dead ends: 64 [2024-10-24 01:12:02,771 INFO L226 Difference]: Without dead ends: 54 [2024-10-24 01:12:02,771 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 7 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=136, Invalid=1054, Unknown=0, NotChecked=0, Total=1190 [2024-10-24 01:12:02,772 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 23 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 525 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 525 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2024-10-24 01:12:02,772 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 97 Invalid, 532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 525 Invalid, 1 Unknown, 0 Unchecked, 4.5s Time] [2024-10-24 01:12:02,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-10-24 01:12:02,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2024-10-24 01:12:02,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 36 states have (on average 1.0833333333333333) internal successors, (39), 37 states have internal predecessors, (39), 10 states have call successors, (10), 8 states have call predecessors, (10), 7 states have return successors, (14), 8 states have call predecessors, (14), 9 states have call successors, (14) [2024-10-24 01:12:02,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2024-10-24 01:12:02,780 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 43 [2024-10-24 01:12:02,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 01:12:02,781 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2024-10-24 01:12:02,781 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2024-10-24 01:12:02,782 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2024-10-24 01:12:02,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-10-24 01:12:02,782 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 01:12:02,783 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 01:12:02,796 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-10-24 01:12:02,983 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 01:12:02,983 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 01:12:02,984 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 01:12:02,984 INFO L85 PathProgramCache]: Analyzing trace with hash -587408748, now seen corresponding path program 1 times [2024-10-24 01:12:02,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 01:12:02,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974480215] [2024-10-24 01:12:02,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 01:12:02,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 01:12:03,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-24 01:12:03,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [576739937] [2024-10-24 01:12:03,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 01:12:03,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 01:12:03,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 01:12:03,023 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 01:12:03,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-24 01:12:03,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 01:12:03,103 INFO L255 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 97 conjuncts are in the unsatisfiable core [2024-10-24 01:12:03,110 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 01:12:03,118 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-24 01:12:03,157 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-24 01:12:03,161 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-24 01:12:03,166 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-24 01:12:03,181 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-24 01:12:03,497 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 14 treesize of output 10 [2024-10-24 01:12:03,712 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-24 01:12:03,742 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 16 treesize of output 8 [2024-10-24 01:12:03,801 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-24 01:12:03,801 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 01:12:04,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 01:12:04,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974480215] [2024-10-24 01:12:04,407 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-24 01:12:04,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576739937] [2024-10-24 01:12:04,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576739937] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 01:12:04,407 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-24 01:12:04,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2024-10-24 01:12:04,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271294080] [2024-10-24 01:12:04,407 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-24 01:12:04,407 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-24 01:12:04,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 01:12:04,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-24 01:12:04,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2024-10-24 01:12:04,408 INFO L87 Difference]: Start difference. First operand 54 states and 63 transitions. Second operand has 21 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2024-10-24 01:12:08,419 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-24 01:12:08,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 01:12:08,944 INFO L93 Difference]: Finished difference Result 62 states and 73 transitions. [2024-10-24 01:12:08,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-10-24 01:12:08,945 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) Word has length 43 [2024-10-24 01:12:08,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 01:12:08,946 INFO L225 Difference]: With dead ends: 62 [2024-10-24 01:12:08,946 INFO L226 Difference]: Without dead ends: 56 [2024-10-24 01:12:08,946 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 7 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=136, Invalid=1054, Unknown=0, NotChecked=0, Total=1190 [2024-10-24 01:12:08,947 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 26 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 394 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 394 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2024-10-24 01:12:08,947 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 87 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 394 Invalid, 1 Unknown, 0 Unchecked, 4.3s Time] [2024-10-24 01:12:08,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-10-24 01:12:08,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 53. [2024-10-24 01:12:08,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 36 states have (on average 1.0833333333333333) internal successors, (39), 36 states have internal predecessors, (39), 9 states have call successors, (9), 8 states have call predecessors, (9), 7 states have return successors, (11), 8 states have call predecessors, (11), 8 states have call successors, (11) [2024-10-24 01:12:08,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2024-10-24 01:12:08,957 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 43 [2024-10-24 01:12:08,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 01:12:08,957 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2024-10-24 01:12:08,957 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2024-10-24 01:12:08,957 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2024-10-24 01:12:08,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-10-24 01:12:08,958 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 01:12:08,958 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 01:12:08,971 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-24 01:12:09,159 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 01:12:09,159 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 01:12:09,160 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 01:12:09,160 INFO L85 PathProgramCache]: Analyzing trace with hash -1603601130, now seen corresponding path program 2 times [2024-10-24 01:12:09,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 01:12:09,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843389575] [2024-10-24 01:12:09,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 01:12:09,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 01:12:09,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-24 01:12:09,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1388850026] [2024-10-24 01:12:09,189 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-24 01:12:09,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 01:12:09,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 01:12:09,191 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 01:12:09,191 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-24 01:12:09,313 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-24 01:12:09,314 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 01:12:09,316 INFO L255 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 139 conjuncts are in the unsatisfiable core [2024-10-24 01:12:09,321 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 01:12:09,325 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-24 01:12:09,366 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-24 01:12:09,370 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-24 01:12:09,379 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-24 01:12:09,397 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-24 01:12:09,748 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 13 treesize of output 9 [2024-10-24 01:12:10,022 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-24 01:12:10,413 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-24 01:12:10,421 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-10-24 01:12:10,429 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 25 [2024-10-24 01:12:10,433 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2024-10-24 01:12:10,497 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-24 01:12:10,498 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 33 [2024-10-24 01:12:10,579 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 33 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-24 01:12:10,589 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 01:12:12,042 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 86 treesize of output 82 [2024-10-24 01:12:12,061 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 86 treesize of output 82 [2024-10-24 01:12:12,081 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 86 treesize of output 82 [2024-10-24 01:12:12,101 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 86 treesize of output 82 [2024-10-24 01:12:12,127 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 86 treesize of output 82 [2024-10-24 01:12:12,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 01:12:12,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843389575] [2024-10-24 01:12:12,296 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-24 01:12:12,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388850026] [2024-10-24 01:12:12,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388850026] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 01:12:12,296 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-24 01:12:12,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2024-10-24 01:12:12,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131666583] [2024-10-24 01:12:12,296 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-24 01:12:12,297 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-10-24 01:12:12,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 01:12:12,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-10-24 01:12:12,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1004, Unknown=0, NotChecked=0, Total=1122 [2024-10-24 01:12:12,298 INFO L87 Difference]: Start difference. First operand 53 states and 59 transitions. Second operand has 29 states, 24 states have (on average 1.5) internal successors, (36), 24 states have internal predecessors, (36), 9 states have call successors, (9), 5 states have call predecessors, (9), 6 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2024-10-24 01:12:16,306 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-24 01:12:17,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 01:12:17,297 INFO L93 Difference]: Finished difference Result 64 states and 77 transitions. [2024-10-24 01:12:17,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-10-24 01:12:17,297 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 24 states have (on average 1.5) internal successors, (36), 24 states have internal predecessors, (36), 9 states have call successors, (9), 5 states have call predecessors, (9), 6 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) Word has length 56 [2024-10-24 01:12:17,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 01:12:17,298 INFO L225 Difference]: With dead ends: 64 [2024-10-24 01:12:17,298 INFO L226 Difference]: Without dead ends: 58 [2024-10-24 01:12:17,299 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 9 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=205, Invalid=1865, Unknown=0, NotChecked=0, Total=2070 [2024-10-24 01:12:17,300 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 37 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 663 mSolverCounterSat, 12 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 663 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2024-10-24 01:12:17,300 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 124 Invalid, 676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 663 Invalid, 1 Unknown, 0 Unchecked, 4.6s Time] [2024-10-24 01:12:17,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2024-10-24 01:12:17,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 56. [2024-10-24 01:12:17,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 38 states have internal predecessors, (40), 10 states have call successors, (10), 8 states have call predecessors, (10), 8 states have return successors, (16), 9 states have call predecessors, (16), 9 states have call successors, (16) [2024-10-24 01:12:17,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 66 transitions. [2024-10-24 01:12:17,317 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 66 transitions. Word has length 56 [2024-10-24 01:12:17,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 01:12:17,317 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 66 transitions. [2024-10-24 01:12:17,317 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 24 states have (on average 1.5) internal successors, (36), 24 states have internal predecessors, (36), 9 states have call successors, (9), 5 states have call predecessors, (9), 6 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2024-10-24 01:12:17,317 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 66 transitions. [2024-10-24 01:12:17,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-10-24 01:12:17,318 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 01:12:17,318 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 01:12:17,331 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-10-24 01:12:17,519 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 01:12:17,519 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 01:12:17,519 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 01:12:17,519 INFO L85 PathProgramCache]: Analyzing trace with hash -1384746412, now seen corresponding path program 1 times [2024-10-24 01:12:17,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 01:12:17,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798322384] [2024-10-24 01:12:17,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 01:12:17,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 01:12:17,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 01:12:17,946 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 01:12:17,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 01:12:17,948 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-24 01:12:17,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 01:12:17,956 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-10-24 01:12:17,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 01:12:18,317 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-24 01:12:18,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 01:12:18,325 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-24 01:12:18,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 01:12:18,677 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-24 01:12:18,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 01:12:18,688 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-24 01:12:18,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 01:12:18,799 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-24 01:12:18,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 01:12:18,806 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 9 proven. 17 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-10-24 01:12:18,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 01:12:18,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798322384] [2024-10-24 01:12:18,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798322384] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 01:12:18,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124176567] [2024-10-24 01:12:18,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 01:12:18,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 01:12:18,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 01:12:18,811 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 01:12:18,816 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-24 01:12:18,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 01:12:18,928 INFO L255 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-10-24 01:12:18,931 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 01:12:18,935 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-24 01:12:18,937 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-24 01:12:19,063 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 13 treesize of output 9 [2024-10-24 01:12:19,161 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 14 treesize of output 10 [2024-10-24 01:12:19,200 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-10-24 01:12:19,201 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 01:12:19,468 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 13 treesize of output 9 [2024-10-24 01:12:19,730 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 19 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-24 01:12:19,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124176567] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 01:12:19,730 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 01:12:19,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 10, 12] total 33 [2024-10-24 01:12:19,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295113832] [2024-10-24 01:12:19,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 01:12:19,730 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-10-24 01:12:19,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 01:12:19,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-10-24 01:12:19,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=941, Unknown=0, NotChecked=0, Total=1056 [2024-10-24 01:12:19,732 INFO L87 Difference]: Start difference. First operand 56 states and 66 transitions. Second operand has 33 states, 25 states have (on average 2.2) internal successors, (55), 29 states have internal predecessors, (55), 15 states have call successors, (18), 6 states have call predecessors, (18), 6 states have return successors, (17), 12 states have call predecessors, (17), 14 states have call successors, (17) [2024-10-24 01:12:20,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 01:12:20,614 INFO L93 Difference]: Finished difference Result 75 states and 101 transitions. [2024-10-24 01:12:20,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-10-24 01:12:20,614 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 25 states have (on average 2.2) internal successors, (55), 29 states have internal predecessors, (55), 15 states have call successors, (18), 6 states have call predecessors, (18), 6 states have return successors, (17), 12 states have call predecessors, (17), 14 states have call successors, (17) Word has length 56 [2024-10-24 01:12:20,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 01:12:20,615 INFO L225 Difference]: With dead ends: 75 [2024-10-24 01:12:20,615 INFO L226 Difference]: Without dead ends: 67 [2024-10-24 01:12:20,616 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=274, Invalid=1706, Unknown=0, NotChecked=0, Total=1980 [2024-10-24 01:12:20,616 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 79 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 797 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 858 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 797 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-24 01:12:20,616 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 143 Invalid, 858 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 797 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-24 01:12:20,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-10-24 01:12:20,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 62. [2024-10-24 01:12:20,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 40 states have (on average 1.075) internal successors, (43), 41 states have internal predecessors, (43), 10 states have call successors, (10), 8 states have call predecessors, (10), 11 states have return successors, (22), 12 states have call predecessors, (22), 9 states have call successors, (22) [2024-10-24 01:12:20,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 75 transitions. [2024-10-24 01:12:20,639 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 75 transitions. Word has length 56 [2024-10-24 01:12:20,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 01:12:20,639 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 75 transitions. [2024-10-24 01:12:20,640 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 25 states have (on average 2.2) internal successors, (55), 29 states have internal predecessors, (55), 15 states have call successors, (18), 6 states have call predecessors, (18), 6 states have return successors, (17), 12 states have call predecessors, (17), 14 states have call successors, (17) [2024-10-24 01:12:20,640 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 75 transitions. [2024-10-24 01:12:20,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-10-24 01:12:20,641 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 01:12:20,641 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 01:12:20,655 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-10-24 01:12:20,841 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 01:12:20,842 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 01:12:20,842 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 01:12:20,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1457132970, now seen corresponding path program 2 times [2024-10-24 01:12:20,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 01:12:20,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106245502] [2024-10-24 01:12:20,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 01:12:20,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 01:12:20,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-24 01:12:20,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1729767737] [2024-10-24 01:12:20,861 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-24 01:12:20,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 01:12:20,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 01:12:20,862 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 01:12:20,863 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-24 01:12:20,973 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-24 01:12:20,973 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 01:12:20,976 INFO L255 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 92 conjuncts are in the unsatisfiable core [2024-10-24 01:12:20,978 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 01:12:20,981 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-24 01:12:20,985 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-24 01:12:20,988 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-24 01:12:20,998 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-24 01:12:21,324 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-24 01:12:21,385 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-10-24 01:12:21,385 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 01:12:21,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 01:12:21,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106245502] [2024-10-24 01:12:21,809 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-24 01:12:21,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729767737] [2024-10-24 01:12:21,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729767737] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 01:12:21,809 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-24 01:12:21,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2024-10-24 01:12:21,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292459071] [2024-10-24 01:12:21,809 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-24 01:12:21,809 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-10-24 01:12:21,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 01:12:21,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-10-24 01:12:21,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2024-10-24 01:12:21,810 INFO L87 Difference]: Start difference. First operand 62 states and 75 transitions. Second operand has 16 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 13 states have internal predecessors, (26), 7 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2024-10-24 01:12:22,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 01:12:22,169 INFO L93 Difference]: Finished difference Result 70 states and 84 transitions. [2024-10-24 01:12:22,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-24 01:12:22,169 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 13 states have internal predecessors, (26), 7 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 56 [2024-10-24 01:12:22,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 01:12:22,170 INFO L225 Difference]: With dead ends: 70 [2024-10-24 01:12:22,170 INFO L226 Difference]: Without dead ends: 64 [2024-10-24 01:12:22,170 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2024-10-24 01:12:22,171 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 15 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 352 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-24 01:12:22,171 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 89 Invalid, 360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 352 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-24 01:12:22,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2024-10-24 01:12:22,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2024-10-24 01:12:22,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 41 states have (on average 1.0731707317073171) internal successors, (44), 42 states have internal predecessors, (44), 10 states have call successors, (10), 8 states have call predecessors, (10), 12 states have return successors, (24), 13 states have call predecessors, (24), 9 states have call successors, (24) [2024-10-24 01:12:22,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 78 transitions. [2024-10-24 01:12:22,183 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 78 transitions. Word has length 56 [2024-10-24 01:12:22,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 01:12:22,183 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 78 transitions. [2024-10-24 01:12:22,183 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 13 states have internal predecessors, (26), 7 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2024-10-24 01:12:22,183 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 78 transitions. [2024-10-24 01:12:22,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2024-10-24 01:12:22,184 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 01:12:22,184 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 01:12:22,197 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-10-24 01:12:22,384 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-10-24 01:12:22,385 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 01:12:22,385 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 01:12:22,385 INFO L85 PathProgramCache]: Analyzing trace with hash 1628557930, now seen corresponding path program 3 times [2024-10-24 01:12:22,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 01:12:22,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249290345] [2024-10-24 01:12:22,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 01:12:22,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 01:12:22,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-24 01:12:22,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1957813030] [2024-10-24 01:12:22,409 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-24 01:12:22,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 01:12:22,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 01:12:22,411 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 01:12:22,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-24 01:12:22,565 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-10-24 01:12:22,566 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 01:12:22,569 INFO L255 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 129 conjuncts are in the unsatisfiable core [2024-10-24 01:12:22,572 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 01:12:22,586 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-24 01:12:22,589 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-24 01:12:22,592 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-24 01:12:22,603 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-24 01:12:23,109 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-24 01:12:23,174 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 13 proven. 30 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2024-10-24 01:12:23,174 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 01:12:23,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 01:12:23,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249290345] [2024-10-24 01:12:23,812 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-24 01:12:23,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957813030] [2024-10-24 01:12:23,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957813030] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 01:12:23,813 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-24 01:12:23,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2024-10-24 01:12:23,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343516203] [2024-10-24 01:12:23,813 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-24 01:12:23,813 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-24 01:12:23,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 01:12:23,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-24 01:12:23,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2024-10-24 01:12:23,814 INFO L87 Difference]: Start difference. First operand 64 states and 78 transitions. Second operand has 20 states, 16 states have (on average 1.875) internal successors, (30), 17 states have internal predecessors, (30), 7 states have call successors, (8), 3 states have call predecessors, (8), 6 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) [2024-10-24 01:12:24,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 01:12:24,295 INFO L93 Difference]: Finished difference Result 72 states and 87 transitions. [2024-10-24 01:12:24,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-10-24 01:12:24,296 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 16 states have (on average 1.875) internal successors, (30), 17 states have internal predecessors, (30), 7 states have call successors, (8), 3 states have call predecessors, (8), 6 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) Word has length 69 [2024-10-24 01:12:24,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 01:12:24,298 INFO L225 Difference]: With dead ends: 72 [2024-10-24 01:12:24,298 INFO L226 Difference]: Without dead ends: 66 [2024-10-24 01:12:24,298 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=104, Invalid=888, Unknown=0, NotChecked=0, Total=992 [2024-10-24 01:12:24,299 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 13 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-24 01:12:24,299 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 122 Invalid, 498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 489 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-24 01:12:24,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-10-24 01:12:24,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2024-10-24 01:12:24,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 42 states have (on average 1.0714285714285714) internal successors, (45), 43 states have internal predecessors, (45), 10 states have call successors, (10), 8 states have call predecessors, (10), 13 states have return successors, (26), 14 states have call predecessors, (26), 9 states have call successors, (26) [2024-10-24 01:12:24,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 81 transitions. [2024-10-24 01:12:24,316 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 81 transitions. Word has length 69 [2024-10-24 01:12:24,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 01:12:24,316 INFO L471 AbstractCegarLoop]: Abstraction has 66 states and 81 transitions. [2024-10-24 01:12:24,318 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 16 states have (on average 1.875) internal successors, (30), 17 states have internal predecessors, (30), 7 states have call successors, (8), 3 states have call predecessors, (8), 6 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) [2024-10-24 01:12:24,318 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 81 transitions. [2024-10-24 01:12:24,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2024-10-24 01:12:24,319 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 01:12:24,320 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 01:12:24,332 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-10-24 01:12:24,520 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-10-24 01:12:24,520 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 01:12:24,521 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 01:12:24,521 INFO L85 PathProgramCache]: Analyzing trace with hash 1986243052, now seen corresponding path program 4 times [2024-10-24 01:12:24,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 01:12:24,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333985800] [2024-10-24 01:12:24,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 01:12:24,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 01:12:24,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-24 01:12:24,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1227079973] [2024-10-24 01:12:24,558 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-24 01:12:24,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 01:12:24,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 01:12:24,560 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 01:12:24,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-24 01:12:24,693 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-24 01:12:24,694 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 01:12:24,697 INFO L255 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 145 conjuncts are in the unsatisfiable core [2024-10-24 01:12:24,701 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 01:12:24,703 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-24 01:12:24,706 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-24 01:12:24,710 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-24 01:12:24,718 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-24 01:12:25,285 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-24 01:12:25,352 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 10 proven. 39 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2024-10-24 01:12:25,352 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 01:12:26,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 01:12:26,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333985800] [2024-10-24 01:12:26,071 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-24 01:12:26,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227079973] [2024-10-24 01:12:26,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227079973] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 01:12:26,071 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-24 01:12:26,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2024-10-24 01:12:26,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264127029] [2024-10-24 01:12:26,071 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-24 01:12:26,072 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-24 01:12:26,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 01:12:26,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-24 01:12:26,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=372, Unknown=0, NotChecked=0, Total=420 [2024-10-24 01:12:26,072 INFO L87 Difference]: Start difference. First operand 66 states and 81 transitions. Second operand has 18 states, 14 states have (on average 2.0) internal successors, (28), 15 states have internal predecessors, (28), 7 states have call successors, (8), 3 states have call predecessors, (8), 6 states have return successors, (9), 8 states have call predecessors, (9), 6 states have call successors, (9) [2024-10-24 01:12:26,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 01:12:26,535 INFO L93 Difference]: Finished difference Result 74 states and 90 transitions. [2024-10-24 01:12:26,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-24 01:12:26,535 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 14 states have (on average 2.0) internal successors, (28), 15 states have internal predecessors, (28), 7 states have call successors, (8), 3 states have call predecessors, (8), 6 states have return successors, (9), 8 states have call predecessors, (9), 6 states have call successors, (9) Word has length 82 [2024-10-24 01:12:26,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 01:12:26,536 INFO L225 Difference]: With dead ends: 74 [2024-10-24 01:12:26,536 INFO L226 Difference]: Without dead ends: 68 [2024-10-24 01:12:26,537 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 66 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=75, Invalid=575, Unknown=0, NotChecked=0, Total=650 [2024-10-24 01:12:26,537 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 14 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-24 01:12:26,537 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 120 Invalid, 463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 456 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-24 01:12:26,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2024-10-24 01:12:26,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2024-10-24 01:12:26,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 43 states have (on average 1.069767441860465) internal successors, (46), 44 states have internal predecessors, (46), 10 states have call successors, (10), 8 states have call predecessors, (10), 14 states have return successors, (28), 15 states have call predecessors, (28), 9 states have call successors, (28) [2024-10-24 01:12:26,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 84 transitions. [2024-10-24 01:12:26,558 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 84 transitions. Word has length 82 [2024-10-24 01:12:26,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 01:12:26,558 INFO L471 AbstractCegarLoop]: Abstraction has 68 states and 84 transitions. [2024-10-24 01:12:26,558 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 14 states have (on average 2.0) internal successors, (28), 15 states have internal predecessors, (28), 7 states have call successors, (8), 3 states have call predecessors, (8), 6 states have return successors, (9), 8 states have call predecessors, (9), 6 states have call successors, (9) [2024-10-24 01:12:26,559 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 84 transitions. [2024-10-24 01:12:26,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-10-24 01:12:26,559 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 01:12:26,559 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 01:12:26,572 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-10-24 01:12:26,760 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-10-24 01:12:26,760 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 01:12:26,760 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 01:12:26,760 INFO L85 PathProgramCache]: Analyzing trace with hash -1675987688, now seen corresponding path program 2 times [2024-10-24 01:12:26,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 01:12:26,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844916788] [2024-10-24 01:12:26,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 01:12:26,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 01:12:26,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-24 01:12:26,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [609474935] [2024-10-24 01:12:26,783 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-24 01:12:26,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 01:12:26,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 01:12:26,785 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 01:12:26,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-24 01:12:26,927 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-24 01:12:26,927 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 01:12:26,936 WARN L253 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 203 conjuncts are in the unsatisfiable core [2024-10-24 01:12:26,940 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 01:12:26,943 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-24 01:12:26,945 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 1 [2024-10-24 01:12:26,947 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-24 01:12:26,950 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-24 01:12:26,954 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-24 01:12:26,966 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-24 01:12:27,533 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 13 treesize of output 9 [2024-10-24 01:12:27,924 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-24 01:12:27,928 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-24 01:12:27,932 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-24 01:12:28,011 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 11 proven. 15 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-10-24 01:12:28,011 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 01:12:30,878 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 68 treesize of output 60 [2024-10-24 01:12:30,885 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 60 treesize of output 56 [2024-10-24 01:12:30,892 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 56 treesize of output 52 [2024-10-24 01:12:34,933 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse5 (select |c_old(#memory_int#1)| |c_func_to_recursive_line_31_to_42_0_#in~y1.base|))) (let ((.cse0 (select (select |c_#memory_int#4| |c_func_to_recursive_line_31_to_42_0_#in~x2.base|) |c_func_to_recursive_line_31_to_42_0_#in~x2.offset|)) (.cse2 (forall ((|v_func_to_recursive_line_31_to_42_0_#in~y1.offset_BEFORE_CALL_12| Int) (|v_func_to_recursive_line_31_to_42_0_#in~x2.offset_BEFORE_CALL_20| Int) (|v_func_to_recursive_line_31_to_42_0_#in~x1.base_BEFORE_CALL_6| Int) (|v_func_to_recursive_line_31_to_42_0_#in~y2.offset_BEFORE_CALL_40| Int) (|v_func_to_recursive_line_31_to_42_0_#in~x2.base_BEFORE_CALL_20| Int) (|v_func_to_recursive_line_31_to_42_0_#in~y1.base_BEFORE_CALL_12| Int) (|v_func_to_recursive_line_31_to_42_0_#in~x1.offset_BEFORE_CALL_6| Int) (|v_func_to_recursive_line_31_to_42_0_#in~y2.base_BEFORE_CALL_40| Int)) (= (+ (select (select |c_#memory_int#2| |v_func_to_recursive_line_31_to_42_0_#in~y2.base_BEFORE_CALL_40|) |v_func_to_recursive_line_31_to_42_0_#in~y2.offset_BEFORE_CALL_40|) (* (select (select |c_#memory_int#4| |v_func_to_recursive_line_31_to_42_0_#in~x2.base_BEFORE_CALL_20|) |v_func_to_recursive_line_31_to_42_0_#in~x2.offset_BEFORE_CALL_20|) (select (select |c_#memory_int#1| |v_func_to_recursive_line_31_to_42_0_#in~y1.base_BEFORE_CALL_12|) |v_func_to_recursive_line_31_to_42_0_#in~y1.offset_BEFORE_CALL_12|))) (select (select |c_#memory_int#3| |v_func_to_recursive_line_31_to_42_0_#in~x1.base_BEFORE_CALL_6|) |v_func_to_recursive_line_31_to_42_0_#in~x1.offset_BEFORE_CALL_6|)))) (.cse1 (select .cse5 |c_func_to_recursive_line_31_to_42_0_#in~y1.offset|)) (.cse3 (select |c_old(#memory_int#2)| |c_func_to_recursive_line_31_to_42_0_#in~y2.base|))) (and (or (< (select (select |c_#memory_int#3| |c_func_to_recursive_line_31_to_42_0_#in~x1.base|) |c_func_to_recursive_line_31_to_42_0_#in~x1.offset|) (+ .cse0 1 (* .cse1 .cse0))) .cse2) (or (= (+ (select .cse3 |c_func_to_recursive_line_31_to_42_0_#in~y2.offset|) 1) .cse0) .cse2) (or (< 0 (select (select |c_old(#memory_int#5)| |c_func_to_recursive_line_31_to_42_0_#in~y3.base|) |c_func_to_recursive_line_31_to_42_0_#in~y3.offset|)) .cse2) (forall ((|v_func_to_recursive_line_31_to_42_0_#in~y1.offset_BEFORE_CALL_12| Int) (|v_func_to_recursive_line_31_to_42_0_#in~x2.offset_BEFORE_CALL_20| Int) (|v_func_to_recursive_line_31_to_42_0_#in~x1.base_BEFORE_CALL_6| Int) (|v_func_to_recursive_line_31_to_42_0_#in~y2.offset_BEFORE_CALL_40| Int) (|v_func_to_recursive_line_31_to_42_0_#in~x2.base_BEFORE_CALL_20| Int) (|v_func_to_recursive_line_31_to_42_0_#in~y1.base_BEFORE_CALL_12| Int) (|v_func_to_recursive_line_31_to_42_0_#in~x1.offset_BEFORE_CALL_6| Int) (|v_func_to_recursive_line_31_to_42_0_#in~y2.base_BEFORE_CALL_40| Int)) (let ((.cse4 (select (select |c_#memory_int#4| |v_func_to_recursive_line_31_to_42_0_#in~x2.base_BEFORE_CALL_20|) |v_func_to_recursive_line_31_to_42_0_#in~x2.offset_BEFORE_CALL_20|)) (.cse6 (select (select |c_#memory_int#3| |v_func_to_recursive_line_31_to_42_0_#in~x1.base_BEFORE_CALL_6|) |v_func_to_recursive_line_31_to_42_0_#in~x1.offset_BEFORE_CALL_6|))) (or (not (= (+ (* .cse4 (select (select (store |c_old(#memory_int#1)| |c_func_to_recursive_line_31_to_42_0_#in~y1.base| (store .cse5 |c_func_to_recursive_line_31_to_42_0_#in~y1.offset| (+ .cse1 1))) |v_func_to_recursive_line_31_to_42_0_#in~y1.base_BEFORE_CALL_12|) |v_func_to_recursive_line_31_to_42_0_#in~y1.offset_BEFORE_CALL_12|)) (select (select (store |c_old(#memory_int#2)| |c_func_to_recursive_line_31_to_42_0_#in~y2.base| (store .cse3 |c_func_to_recursive_line_31_to_42_0_#in~y2.offset| 0)) |v_func_to_recursive_line_31_to_42_0_#in~y2.base_BEFORE_CALL_40|) |v_func_to_recursive_line_31_to_42_0_#in~y2.offset_BEFORE_CALL_40|)) .cse6)) (= (+ (select (select |c_#memory_int#2| |v_func_to_recursive_line_31_to_42_0_#in~y2.base_BEFORE_CALL_40|) |v_func_to_recursive_line_31_to_42_0_#in~y2.offset_BEFORE_CALL_40|) (* .cse4 (select (select |c_#memory_int#1| |v_func_to_recursive_line_31_to_42_0_#in~y1.base_BEFORE_CALL_12|) |v_func_to_recursive_line_31_to_42_0_#in~y1.offset_BEFORE_CALL_12|))) .cse6))))))) is different from false [2024-10-24 01:12:35,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 01:12:35,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844916788] [2024-10-24 01:12:35,332 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-24 01:12:35,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609474935] [2024-10-24 01:12:35,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609474935] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 01:12:35,332 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-24 01:12:35,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2024-10-24 01:12:35,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392449956] [2024-10-24 01:12:35,333 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-24 01:12:35,333 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-24 01:12:35,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 01:12:35,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-24 01:12:35,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=587, Unknown=1, NotChecked=48, Total=702 [2024-10-24 01:12:35,333 INFO L87 Difference]: Start difference. First operand 68 states and 84 transitions. Second operand has 20 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 16 states have internal predecessors, (29), 7 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2024-10-24 01:12:36,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 01:12:36,301 INFO L93 Difference]: Finished difference Result 76 states and 93 transitions. [2024-10-24 01:12:36,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-10-24 01:12:36,301 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 16 states have internal predecessors, (29), 7 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) Word has length 56 [2024-10-24 01:12:36,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 01:12:36,302 INFO L225 Difference]: With dead ends: 76 [2024-10-24 01:12:36,302 INFO L226 Difference]: Without dead ends: 70 [2024-10-24 01:12:36,303 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=127, Invalid=1136, Unknown=1, NotChecked=68, Total=1332 [2024-10-24 01:12:36,303 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 17 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 571 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-24 01:12:36,303 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 129 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 571 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-24 01:12:36,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2024-10-24 01:12:36,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 68. [2024-10-24 01:12:36,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 43 states have (on average 1.069767441860465) internal successors, (46), 44 states have internal predecessors, (46), 10 states have call successors, (10), 8 states have call predecessors, (10), 14 states have return successors, (28), 15 states have call predecessors, (28), 9 states have call successors, (28) [2024-10-24 01:12:36,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 84 transitions. [2024-10-24 01:12:36,316 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 84 transitions. Word has length 56 [2024-10-24 01:12:36,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 01:12:36,317 INFO L471 AbstractCegarLoop]: Abstraction has 68 states and 84 transitions. [2024-10-24 01:12:36,317 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 16 states have internal predecessors, (29), 7 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2024-10-24 01:12:36,317 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 84 transitions. [2024-10-24 01:12:36,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2024-10-24 01:12:36,317 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 01:12:36,317 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 01:12:36,331 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-10-24 01:12:36,518 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-10-24 01:12:36,518 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 01:12:36,518 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 01:12:36,518 INFO L85 PathProgramCache]: Analyzing trace with hash 1723148096, now seen corresponding path program 5 times [2024-10-24 01:12:36,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 01:12:36,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445215734] [2024-10-24 01:12:36,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 01:12:36,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 01:12:36,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-24 01:12:36,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1843074513] [2024-10-24 01:12:36,555 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-24 01:12:36,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 01:12:36,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 01:12:36,557 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 01:12:36,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-24 01:12:36,766 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-10-24 01:12:36,766 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 01:12:36,771 INFO L255 TraceCheckSpWp]: Trace formula consists of 622 conjuncts, 185 conjuncts are in the unsatisfiable core [2024-10-24 01:12:36,776 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 01:12:36,795 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-24 01:12:36,799 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-24 01:12:36,803 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-24 01:12:36,820 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-24 01:12:37,508 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-24 01:12:37,598 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 14 proven. 67 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2024-10-24 01:12:37,598 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 01:12:38,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 01:12:38,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445215734] [2024-10-24 01:12:38,575 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-24 01:12:38,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843074513] [2024-10-24 01:12:38,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843074513] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 01:12:38,575 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-24 01:12:38,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2024-10-24 01:12:38,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13405914] [2024-10-24 01:12:38,575 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-24 01:12:38,575 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-10-24 01:12:38,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 01:12:38,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-10-24 01:12:38,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=589, Unknown=0, NotChecked=0, Total=650 [2024-10-24 01:12:38,576 INFO L87 Difference]: Start difference. First operand 68 states and 84 transitions. Second operand has 22 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 19 states have internal predecessors, (32), 7 states have call successors, (8), 3 states have call predecessors, (8), 8 states have return successors, (11), 9 states have call predecessors, (11), 6 states have call successors, (11) [2024-10-24 01:12:39,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 01:12:39,187 INFO L93 Difference]: Finished difference Result 78 states and 96 transitions. [2024-10-24 01:12:39,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-10-24 01:12:39,188 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 19 states have internal predecessors, (32), 7 states have call successors, (8), 3 states have call predecessors, (8), 8 states have return successors, (11), 9 states have call predecessors, (11), 6 states have call successors, (11) Word has length 95 [2024-10-24 01:12:39,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 01:12:39,189 INFO L225 Difference]: With dead ends: 78 [2024-10-24 01:12:39,189 INFO L226 Difference]: Without dead ends: 72 [2024-10-24 01:12:39,189 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=108, Invalid=1014, Unknown=0, NotChecked=0, Total=1122 [2024-10-24 01:12:39,190 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 12 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 567 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-24 01:12:39,190 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 156 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 567 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-24 01:12:39,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2024-10-24 01:12:39,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2024-10-24 01:12:39,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 44 states have (on average 1.0681818181818181) internal successors, (47), 45 states have internal predecessors, (47), 10 states have call successors, (10), 8 states have call predecessors, (10), 15 states have return successors, (30), 16 states have call predecessors, (30), 9 states have call successors, (30) [2024-10-24 01:12:39,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 87 transitions. [2024-10-24 01:12:39,205 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 87 transitions. Word has length 95 [2024-10-24 01:12:39,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 01:12:39,206 INFO L471 AbstractCegarLoop]: Abstraction has 70 states and 87 transitions. [2024-10-24 01:12:39,206 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 19 states have internal predecessors, (32), 7 states have call successors, (8), 3 states have call predecessors, (8), 8 states have return successors, (11), 9 states have call predecessors, (11), 6 states have call successors, (11) [2024-10-24 01:12:39,206 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 87 transitions. [2024-10-24 01:12:39,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2024-10-24 01:12:39,207 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 01:12:39,207 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 01:12:39,222 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-10-24 01:12:39,408 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-10-24 01:12:39,408 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 01:12:39,409 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 01:12:39,409 INFO L85 PathProgramCache]: Analyzing trace with hash 1762571436, now seen corresponding path program 3 times [2024-10-24 01:12:39,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 01:12:39,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348474869] [2024-10-24 01:12:39,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 01:12:39,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 01:12:39,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-24 01:12:39,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [250017237] [2024-10-24 01:12:39,450 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-24 01:12:39,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 01:12:39,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 01:12:39,452 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 01:12:39,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-10-24 01:12:39,705 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-10-24 01:12:39,706 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 01:12:39,709 INFO L255 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 207 conjuncts are in the unsatisfiable core [2024-10-24 01:12:39,713 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 01:12:39,721 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-24 01:12:39,725 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-24 01:12:39,768 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-24 01:12:39,775 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-24 01:12:39,780 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-24 01:12:39,797 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-24 01:12:40,329 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 13 treesize of output 9 [2024-10-24 01:12:40,581 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-24 01:12:40,584 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-24 01:12:40,678 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 10 proven. 29 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-10-24 01:12:40,678 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 01:12:47,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 01:12:47,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348474869] [2024-10-24 01:12:47,382 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-24 01:12:47,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250017237] [2024-10-24 01:12:47,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250017237] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 01:12:47,382 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-24 01:12:47,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2024-10-24 01:12:47,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943345040] [2024-10-24 01:12:47,382 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-24 01:12:47,383 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-24 01:12:47,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 01:12:47,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-24 01:12:47,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=686, Unknown=1, NotChecked=0, Total=756 [2024-10-24 01:12:47,383 INFO L87 Difference]: Start difference. First operand 70 states and 87 transitions. Second operand has 21 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 18 states have internal predecessors, (31), 7 states have call successors, (8), 3 states have call predecessors, (8), 6 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) [2024-10-24 01:12:48,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 01:12:48,212 INFO L93 Difference]: Finished difference Result 80 states and 99 transitions. [2024-10-24 01:12:48,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-10-24 01:12:48,213 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 18 states have internal predecessors, (31), 7 states have call successors, (8), 3 states have call predecessors, (8), 6 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) Word has length 69 [2024-10-24 01:12:48,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 01:12:48,213 INFO L225 Difference]: With dead ends: 80 [2024-10-24 01:12:48,213 INFO L226 Difference]: Without dead ends: 74 [2024-10-24 01:12:48,214 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=113, Invalid=1146, Unknown=1, NotChecked=0, Total=1260 [2024-10-24 01:12:48,214 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 13 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 679 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 686 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 679 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-10-24 01:12:48,214 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 147 Invalid, 686 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 679 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-10-24 01:12:48,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2024-10-24 01:12:48,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 70. [2024-10-24 01:12:48,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 44 states have (on average 1.0681818181818181) internal successors, (47), 45 states have internal predecessors, (47), 10 states have call successors, (10), 8 states have call predecessors, (10), 15 states have return successors, (30), 16 states have call predecessors, (30), 9 states have call successors, (30) [2024-10-24 01:12:48,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 87 transitions. [2024-10-24 01:12:48,227 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 87 transitions. Word has length 69 [2024-10-24 01:12:48,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 01:12:48,227 INFO L471 AbstractCegarLoop]: Abstraction has 70 states and 87 transitions. [2024-10-24 01:12:48,228 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 18 states have internal predecessors, (31), 7 states have call successors, (8), 3 states have call predecessors, (8), 6 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) [2024-10-24 01:12:48,228 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 87 transitions. [2024-10-24 01:12:48,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2024-10-24 01:12:48,228 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 01:12:48,228 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 01:12:48,242 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-10-24 01:12:48,428 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-10-24 01:12:48,429 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 01:12:48,429 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 01:12:48,429 INFO L85 PathProgramCache]: Analyzing trace with hash 678304236, now seen corresponding path program 3 times [2024-10-24 01:12:48,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 01:12:48,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327758750] [2024-10-24 01:12:48,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 01:12:48,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 01:12:48,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-24 01:12:48,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [513307270] [2024-10-24 01:12:48,468 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-24 01:12:48,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 01:12:48,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 01:12:48,470 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 01:12:48,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-10-24 01:12:48,654 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-10-24 01:12:48,654 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 01:12:48,657 INFO L255 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 195 conjuncts are in the unsatisfiable core [2024-10-24 01:12:48,661 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 01:12:48,668 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-24 01:12:48,697 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-24 01:12:48,700 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-24 01:12:48,707 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-24 01:12:48,724 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-24 01:12:48,976 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 13 treesize of output 9 [2024-10-24 01:12:49,264 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-24 01:12:49,543 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-24 01:12:49,552 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-10-24 01:12:49,642 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 10 proven. 42 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-10-24 01:12:49,642 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 01:12:51,401 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 86 treesize of output 82 [2024-10-24 01:12:51,414 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 86 treesize of output 82 [2024-10-24 01:12:51,442 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 86 treesize of output 82 [2024-10-24 01:12:51,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 01:12:51,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327758750] [2024-10-24 01:12:51,557 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-24 01:12:51,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513307270] [2024-10-24 01:12:51,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513307270] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 01:12:51,557 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-24 01:12:51,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2024-10-24 01:12:51,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168360973] [2024-10-24 01:12:51,558 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-24 01:12:51,558 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-10-24 01:12:51,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 01:12:51,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-10-24 01:12:51,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=848, Unknown=0, NotChecked=0, Total=930 [2024-10-24 01:12:51,559 INFO L87 Difference]: Start difference. First operand 70 states and 87 transitions. Second operand has 24 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 20 states have internal predecessors, (35), 9 states have call successors, (10), 4 states have call predecessors, (10), 6 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2024-10-24 01:12:52,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 01:12:52,317 INFO L93 Difference]: Finished difference Result 78 states and 97 transitions. [2024-10-24 01:12:52,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-10-24 01:12:52,317 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 20 states have internal predecessors, (35), 9 states have call successors, (10), 4 states have call predecessors, (10), 6 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) Word has length 69 [2024-10-24 01:12:52,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 01:12:52,318 INFO L225 Difference]: With dead ends: 78 [2024-10-24 01:12:52,318 INFO L226 Difference]: Without dead ends: 72 [2024-10-24 01:12:52,318 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=151, Invalid=1489, Unknown=0, NotChecked=0, Total=1640 [2024-10-24 01:12:52,318 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 18 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 629 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-24 01:12:52,319 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 127 Invalid, 637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 629 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-24 01:12:52,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2024-10-24 01:12:52,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2024-10-24 01:12:52,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 45 states have (on average 1.0666666666666667) internal successors, (48), 46 states have internal predecessors, (48), 10 states have call successors, (10), 8 states have call predecessors, (10), 16 states have return successors, (32), 17 states have call predecessors, (32), 9 states have call successors, (32) [2024-10-24 01:12:52,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 90 transitions. [2024-10-24 01:12:52,330 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 90 transitions. Word has length 69 [2024-10-24 01:12:52,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 01:12:52,331 INFO L471 AbstractCegarLoop]: Abstraction has 72 states and 90 transitions. [2024-10-24 01:12:52,331 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 20 states have internal predecessors, (35), 9 states have call successors, (10), 4 states have call predecessors, (10), 6 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2024-10-24 01:12:52,331 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 90 transitions. [2024-10-24 01:12:52,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2024-10-24 01:12:52,331 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 01:12:52,332 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 01:12:52,345 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-10-24 01:12:52,532 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 01:12:52,532 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 01:12:52,532 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 01:12:52,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1688390358, now seen corresponding path program 4 times [2024-10-24 01:12:52,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 01:12:52,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272550554] [2024-10-24 01:12:52,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 01:12:52,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 01:12:52,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 01:12:52,998 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 01:12:52,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 01:12:53,000 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-24 01:12:53,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 01:12:53,008 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-10-24 01:12:53,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 01:12:53,258 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-24 01:12:53,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 01:12:53,263 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-24 01:12:53,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 01:12:53,502 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-24 01:12:53,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 01:12:53,506 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-24 01:12:53,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 01:12:53,753 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-24 01:12:53,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 01:12:53,763 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-24 01:12:53,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 01:12:53,782 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-24 01:12:53,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 01:12:53,784 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 24 proven. 26 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-10-24 01:12:53,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 01:12:53,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272550554] [2024-10-24 01:12:53,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272550554] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 01:12:53,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371719265] [2024-10-24 01:12:53,785 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-24 01:12:53,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 01:12:53,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 01:12:53,787 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 01:12:53,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-10-24 01:12:53,954 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-24 01:12:53,954 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 01:12:53,957 INFO L255 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 130 conjuncts are in the unsatisfiable core [2024-10-24 01:12:53,961 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 01:12:53,964 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-24 01:12:53,968 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-24 01:12:54,347 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 13 treesize of output 9 [2024-10-24 01:12:54,464 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 13 treesize of output 9 [2024-10-24 01:12:54,602 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2024-10-24 01:12:54,603 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 01:12:55,426 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 8 treesize of output 4 [2024-10-24 01:12:55,800 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 8 treesize of output 4 [2024-10-24 01:12:55,921 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 14 proven. 42 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-10-24 01:12:55,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371719265] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 01:12:55,921 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 01:12:55,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15, 16] total 45 [2024-10-24 01:12:55,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527492940] [2024-10-24 01:12:55,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 01:12:55,922 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-10-24 01:12:55,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 01:12:55,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-10-24 01:12:55,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=1744, Unknown=0, NotChecked=0, Total=1980 [2024-10-24 01:12:55,923 INFO L87 Difference]: Start difference. First operand 72 states and 90 transitions. Second operand has 45 states, 32 states have (on average 2.3125) internal successors, (74), 40 states have internal predecessors, (74), 22 states have call successors, (24), 8 states have call predecessors, (24), 11 states have return successors, (23), 19 states have call predecessors, (23), 21 states have call successors, (23) [2024-10-24 01:12:58,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 01:12:58,507 INFO L93 Difference]: Finished difference Result 232 states and 334 transitions. [2024-10-24 01:12:58,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2024-10-24 01:12:58,507 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 32 states have (on average 2.3125) internal successors, (74), 40 states have internal predecessors, (74), 22 states have call successors, (24), 8 states have call predecessors, (24), 11 states have return successors, (23), 19 states have call predecessors, (23), 21 states have call successors, (23) Word has length 69 [2024-10-24 01:12:58,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 01:12:58,509 INFO L225 Difference]: With dead ends: 232 [2024-10-24 01:12:58,509 INFO L226 Difference]: Without dead ends: 184 [2024-10-24 01:12:58,511 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2384 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1220, Invalid=7336, Unknown=0, NotChecked=0, Total=8556 [2024-10-24 01:12:58,511 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 224 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 1266 mSolverCounterSat, 262 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 1528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 262 IncrementalHoareTripleChecker+Valid, 1266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-10-24 01:12:58,511 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [224 Valid, 282 Invalid, 1528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [262 Valid, 1266 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-10-24 01:12:58,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2024-10-24 01:12:58,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 100. [2024-10-24 01:12:58,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 63 states have (on average 1.126984126984127) internal successors, (71), 68 states have internal predecessors, (71), 17 states have call successors, (17), 11 states have call predecessors, (17), 19 states have return successors, (35), 21 states have call predecessors, (35), 16 states have call successors, (35) [2024-10-24 01:12:58,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 123 transitions. [2024-10-24 01:12:58,532 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 123 transitions. Word has length 69 [2024-10-24 01:12:58,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 01:12:58,533 INFO L471 AbstractCegarLoop]: Abstraction has 100 states and 123 transitions. [2024-10-24 01:12:58,533 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 32 states have (on average 2.3125) internal successors, (74), 40 states have internal predecessors, (74), 22 states have call successors, (24), 8 states have call predecessors, (24), 11 states have return successors, (23), 19 states have call predecessors, (23), 21 states have call successors, (23) [2024-10-24 01:12:58,533 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 123 transitions. [2024-10-24 01:12:58,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2024-10-24 01:12:58,534 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 01:12:58,534 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 01:12:58,547 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-10-24 01:12:58,734 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-10-24 01:12:58,735 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 01:12:58,735 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 01:12:58,735 INFO L85 PathProgramCache]: Analyzing trace with hash -1822403864, now seen corresponding path program 5 times [2024-10-24 01:12:58,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 01:12:58,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720430999] [2024-10-24 01:12:58,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 01:12:58,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 01:12:58,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-24 01:12:58,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [273462730] [2024-10-24 01:12:58,768 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-24 01:12:58,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 01:12:58,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 01:12:58,769 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 01:12:58,770 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-10-24 01:12:58,988 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-10-24 01:12:58,988 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 01:12:58,993 INFO L255 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 192 conjuncts are in the unsatisfiable core [2024-10-24 01:12:58,997 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 01:12:59,000 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-24 01:12:59,063 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-24 01:12:59,066 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-24 01:12:59,072 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-24 01:12:59,093 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-24 01:12:59,749 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 13 treesize of output 9 [2024-10-24 01:13:00,503 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 43 treesize of output 23 [2024-10-24 01:13:00,516 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-24 01:13:00,524 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-24 01:13:00,590 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-24 01:13:00,590 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 53 treesize of output 37 [2024-10-24 01:13:00,674 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 1 proven. 58 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-10-24 01:13:00,675 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 01:13:02,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 01:13:02,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720430999] [2024-10-24 01:13:02,877 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-24 01:13:02,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273462730] [2024-10-24 01:13:02,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273462730] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 01:13:02,878 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-24 01:13:02,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2024-10-24 01:13:02,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875619713] [2024-10-24 01:13:02,878 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-24 01:13:02,878 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-10-24 01:13:02,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 01:13:02,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-10-24 01:13:02,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1270, Unknown=0, NotChecked=0, Total=1406 [2024-10-24 01:13:02,879 INFO L87 Difference]: Start difference. First operand 100 states and 123 transitions. Second operand has 31 states, 25 states have (on average 1.56) internal successors, (39), 27 states have internal predecessors, (39), 10 states have call successors, (10), 4 states have call predecessors, (10), 7 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) [2024-10-24 01:13:06,899 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-24 01:13:08,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 01:13:08,323 INFO L93 Difference]: Finished difference Result 126 states and 154 transitions. [2024-10-24 01:13:08,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-10-24 01:13:08,323 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 25 states have (on average 1.56) internal successors, (39), 27 states have internal predecessors, (39), 10 states have call successors, (10), 4 states have call predecessors, (10), 7 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) Word has length 69 [2024-10-24 01:13:08,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 01:13:08,324 INFO L225 Difference]: With dead ends: 126 [2024-10-24 01:13:08,324 INFO L226 Difference]: Without dead ends: 120 [2024-10-24 01:13:08,325 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 32 SyntacticMatches, 9 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=220, Invalid=2230, Unknown=0, NotChecked=0, Total=2450 [2024-10-24 01:13:08,325 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 25 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 817 mSolverCounterSat, 10 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 817 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2024-10-24 01:13:08,325 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 167 Invalid, 828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 817 Invalid, 1 Unknown, 0 Unchecked, 5.0s Time] [2024-10-24 01:13:08,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2024-10-24 01:13:08,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 104. [2024-10-24 01:13:08,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 65 states have (on average 1.123076923076923) internal successors, (73), 70 states have internal predecessors, (73), 17 states have call successors, (17), 11 states have call predecessors, (17), 21 states have return successors, (38), 22 states have call predecessors, (38), 16 states have call successors, (38) [2024-10-24 01:13:08,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 128 transitions. [2024-10-24 01:13:08,347 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 128 transitions. Word has length 69 [2024-10-24 01:13:08,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 01:13:08,347 INFO L471 AbstractCegarLoop]: Abstraction has 104 states and 128 transitions. [2024-10-24 01:13:08,347 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 25 states have (on average 1.56) internal successors, (39), 27 states have internal predecessors, (39), 10 states have call successors, (10), 4 states have call predecessors, (10), 7 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) [2024-10-24 01:13:08,347 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 128 transitions. [2024-10-24 01:13:08,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2024-10-24 01:13:08,348 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 01:13:08,348 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 01:13:08,363 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-10-24 01:13:08,548 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-10-24 01:13:08,549 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 01:13:08,549 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 01:13:08,549 INFO L85 PathProgramCache]: Analyzing trace with hash -1235189908, now seen corresponding path program 4 times [2024-10-24 01:13:08,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 01:13:08,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239105650] [2024-10-24 01:13:08,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 01:13:08,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 01:13:08,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-24 01:13:08,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [121645380] [2024-10-24 01:13:08,576 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-24 01:13:08,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 01:13:08,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 01:13:08,578 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 01:13:08,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-10-24 01:13:08,800 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-24 01:13:08,801 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 01:13:08,805 INFO L255 TraceCheckSpWp]: Trace formula consists of 474 conjuncts, 201 conjuncts are in the unsatisfiable core [2024-10-24 01:13:08,808 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 01:13:08,811 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-24 01:13:08,826 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-24 01:13:08,831 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-24 01:13:08,847 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-24 01:13:09,090 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 13 treesize of output 9 [2024-10-24 01:13:09,387 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-24 01:13:09,696 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-10-24 01:13:09,698 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-24 01:13:09,785 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 13 proven. 59 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-10-24 01:13:09,785 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 01:13:10,918 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 40 treesize of output 28 [2024-10-24 01:13:11,841 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 86 treesize of output 82 [2024-10-24 01:13:11,865 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 86 treesize of output 82 [2024-10-24 01:13:12,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 01:13:12,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239105650] [2024-10-24 01:13:12,009 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-24 01:13:12,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121645380] [2024-10-24 01:13:12,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121645380] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 01:13:12,009 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-24 01:13:12,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2024-10-24 01:13:12,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081110215] [2024-10-24 01:13:12,009 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-24 01:13:12,009 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-10-24 01:13:12,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 01:13:12,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-10-24 01:13:12,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=631, Unknown=0, NotChecked=0, Total=702 [2024-10-24 01:13:12,010 INFO L87 Difference]: Start difference. First operand 104 states and 128 transitions. Second operand has 22 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 18 states have internal predecessors, (33), 9 states have call successors, (10), 4 states have call predecessors, (10), 6 states have return successors, (10), 9 states have call predecessors, (10), 8 states have call successors, (10) [2024-10-24 01:13:12,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 01:13:12,754 INFO L93 Difference]: Finished difference Result 116 states and 142 transitions. [2024-10-24 01:13:12,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-10-24 01:13:12,754 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 18 states have internal predecessors, (33), 9 states have call successors, (10), 4 states have call predecessors, (10), 6 states have return successors, (10), 9 states have call predecessors, (10), 8 states have call successors, (10) Word has length 82 [2024-10-24 01:13:12,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 01:13:12,755 INFO L225 Difference]: With dead ends: 116 [2024-10-24 01:13:12,755 INFO L226 Difference]: Without dead ends: 110 [2024-10-24 01:13:12,755 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=122, Invalid=1000, Unknown=0, NotChecked=0, Total=1122 [2024-10-24 01:13:12,756 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 14 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 634 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-24 01:13:12,756 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 158 Invalid, 641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 634 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-24 01:13:12,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2024-10-24 01:13:12,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 106. [2024-10-24 01:13:12,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 66 states have (on average 1.121212121212121) internal successors, (74), 71 states have internal predecessors, (74), 17 states have call successors, (17), 11 states have call predecessors, (17), 22 states have return successors, (39), 23 states have call predecessors, (39), 16 states have call successors, (39) [2024-10-24 01:13:12,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 130 transitions. [2024-10-24 01:13:12,777 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 130 transitions. Word has length 82 [2024-10-24 01:13:12,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 01:13:12,777 INFO L471 AbstractCegarLoop]: Abstraction has 106 states and 130 transitions. [2024-10-24 01:13:12,778 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 18 states have internal predecessors, (33), 9 states have call successors, (10), 4 states have call predecessors, (10), 6 states have return successors, (10), 9 states have call predecessors, (10), 8 states have call successors, (10) [2024-10-24 01:13:12,778 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 130 transitions. [2024-10-24 01:13:12,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2024-10-24 01:13:12,778 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 01:13:12,778 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 01:13:12,798 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-10-24 01:13:12,978 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-10-24 01:13:12,979 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 01:13:12,979 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 01:13:12,979 INFO L85 PathProgramCache]: Analyzing trace with hash -14958608, now seen corresponding path program 6 times [2024-10-24 01:13:12,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 01:13:12,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145315669] [2024-10-24 01:13:12,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 01:13:12,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 01:13:13,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-24 01:13:13,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [595362667] [2024-10-24 01:13:13,008 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-24 01:13:13,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 01:13:13,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 01:13:13,010 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 01:13:13,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-10-24 01:13:13,289 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2024-10-24 01:13:13,289 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 01:13:13,297 INFO L255 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 219 conjuncts are in the unsatisfiable core [2024-10-24 01:13:13,301 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 01:13:13,306 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-24 01:13:13,322 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-24 01:13:13,326 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-24 01:13:13,331 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-24 01:13:13,350 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-24 01:13:13,770 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 13 treesize of output 9 [2024-10-24 01:13:13,992 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-24 01:13:14,331 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-24 01:13:14,336 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-10-24 01:13:14,430 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 20 proven. 71 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-10-24 01:13:14,431 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 01:13:17,120 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 86 treesize of output 82 [2024-10-24 01:13:17,138 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 82 [2024-10-24 01:13:17,158 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 86 treesize of output 82 [2024-10-24 01:13:17,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 01:13:17,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145315669] [2024-10-24 01:13:17,322 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-24 01:13:17,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595362667] [2024-10-24 01:13:17,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595362667] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 01:13:17,322 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-24 01:13:17,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2024-10-24 01:13:17,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963833011] [2024-10-24 01:13:17,322 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-24 01:13:17,323 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-10-24 01:13:17,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 01:13:17,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-10-24 01:13:17,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=905, Unknown=0, NotChecked=0, Total=992 [2024-10-24 01:13:17,325 INFO L87 Difference]: Start difference. First operand 106 states and 130 transitions. Second operand has 26 states, 20 states have (on average 1.9) internal successors, (38), 22 states have internal predecessors, (38), 10 states have call successors, (11), 4 states have call predecessors, (11), 7 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) [2024-10-24 01:13:18,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 01:13:18,247 INFO L93 Difference]: Finished difference Result 134 states and 164 transitions. [2024-10-24 01:13:18,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-10-24 01:13:18,248 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 20 states have (on average 1.9) internal successors, (38), 22 states have internal predecessors, (38), 10 states have call successors, (11), 4 states have call predecessors, (11), 7 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) Word has length 82 [2024-10-24 01:13:18,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 01:13:18,249 INFO L225 Difference]: With dead ends: 134 [2024-10-24 01:13:18,249 INFO L226 Difference]: Without dead ends: 128 [2024-10-24 01:13:18,249 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=152, Invalid=1488, Unknown=0, NotChecked=0, Total=1640 [2024-10-24 01:13:18,250 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 14 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 762 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 762 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-10-24 01:13:18,250 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 171 Invalid, 772 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 762 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-10-24 01:13:18,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2024-10-24 01:13:18,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 106. [2024-10-24 01:13:18,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 66 states have (on average 1.121212121212121) internal successors, (74), 71 states have internal predecessors, (74), 17 states have call successors, (17), 11 states have call predecessors, (17), 22 states have return successors, (39), 24 states have call predecessors, (39), 16 states have call successors, (39) [2024-10-24 01:13:18,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 130 transitions. [2024-10-24 01:13:18,274 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 130 transitions. Word has length 82 [2024-10-24 01:13:18,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 01:13:18,274 INFO L471 AbstractCegarLoop]: Abstraction has 106 states and 130 transitions. [2024-10-24 01:13:18,274 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 20 states have (on average 1.9) internal successors, (38), 22 states have internal predecessors, (38), 10 states have call successors, (11), 4 states have call predecessors, (11), 7 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) [2024-10-24 01:13:18,274 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 130 transitions. [2024-10-24 01:13:18,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2024-10-24 01:13:18,275 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 01:13:18,275 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 01:13:18,292 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-10-24 01:13:18,475 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 01:13:18,475 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 01:13:18,476 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 01:13:18,476 INFO L85 PathProgramCache]: Analyzing trace with hash 47081006, now seen corresponding path program 7 times [2024-10-24 01:13:18,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 01:13:18,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831040028] [2024-10-24 01:13:18,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 01:13:18,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 01:13:18,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 01:13:18,917 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 01:13:18,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 01:13:18,919 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-24 01:13:18,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 01:13:18,928 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-10-24 01:13:18,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 01:13:19,283 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-24 01:13:19,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 01:13:19,288 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-24 01:13:19,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 01:13:19,610 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-24 01:13:19,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 01:13:19,615 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-24 01:13:19,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 01:13:19,977 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-24 01:13:19,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 01:13:19,983 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-24 01:13:19,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 01:13:20,400 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-24 01:13:20,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 01:13:20,407 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-24 01:13:20,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 01:13:20,487 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-24 01:13:20,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 01:13:20,491 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 34 proven. 48 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2024-10-24 01:13:20,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 01:13:20,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831040028] [2024-10-24 01:13:20,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831040028] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 01:13:20,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076636024] [2024-10-24 01:13:20,492 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-24 01:13:20,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 01:13:20,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 01:13:20,493 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 01:13:20,494 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-10-24 01:13:20,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 01:13:20,686 INFO L255 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 105 conjuncts are in the unsatisfiable core [2024-10-24 01:13:20,690 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 01:13:20,692 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-24 01:13:20,693 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-24 01:13:20,890 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 13 treesize of output 9 [2024-10-24 01:13:21,009 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 14 treesize of output 10 [2024-10-24 01:13:21,128 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 23 proven. 37 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2024-10-24 01:13:21,128 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 01:13:21,691 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 13 treesize of output 9 [2024-10-24 01:13:21,858 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 13 treesize of output 9 [2024-10-24 01:13:21,951 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 14 treesize of output 10 [2024-10-24 01:13:22,447 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 22 proven. 70 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-10-24 01:13:22,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076636024] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 01:13:22,447 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 01:13:22,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 14, 20] total 51 [2024-10-24 01:13:22,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147275546] [2024-10-24 01:13:22,447 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 01:13:22,448 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-10-24 01:13:22,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 01:13:22,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-10-24 01:13:22,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=2279, Unknown=0, NotChecked=0, Total=2550 [2024-10-24 01:13:22,449 INFO L87 Difference]: Start difference. First operand 106 states and 130 transitions. Second operand has 51 states, 36 states have (on average 2.25) internal successors, (81), 45 states have internal predecessors, (81), 25 states have call successors, (28), 8 states have call predecessors, (28), 10 states have return successors, (28), 20 states have call predecessors, (28), 24 states have call successors, (28) [2024-10-24 01:13:25,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 01:13:25,168 INFO L93 Difference]: Finished difference Result 172 states and 216 transitions. [2024-10-24 01:13:25,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2024-10-24 01:13:25,169 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 36 states have (on average 2.25) internal successors, (81), 45 states have internal predecessors, (81), 25 states have call successors, (28), 8 states have call predecessors, (28), 10 states have return successors, (28), 20 states have call predecessors, (28), 24 states have call successors, (28) Word has length 82 [2024-10-24 01:13:25,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 01:13:25,170 INFO L225 Difference]: With dead ends: 172 [2024-10-24 01:13:25,170 INFO L226 Difference]: Without dead ends: 156 [2024-10-24 01:13:25,171 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1776 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1082, Invalid=6928, Unknown=0, NotChecked=0, Total=8010 [2024-10-24 01:13:25,172 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 174 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 1556 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 1728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 1556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-10-24 01:13:25,172 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 331 Invalid, 1728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 1556 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-10-24 01:13:25,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2024-10-24 01:13:25,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 114. [2024-10-24 01:13:25,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 70 states have (on average 1.1142857142857143) internal successors, (78), 75 states have internal predecessors, (78), 17 states have call successors, (17), 11 states have call predecessors, (17), 26 states have return successors, (44), 28 states have call predecessors, (44), 16 states have call successors, (44) [2024-10-24 01:13:25,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 139 transitions. [2024-10-24 01:13:25,219 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 139 transitions. Word has length 82 [2024-10-24 01:13:25,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 01:13:25,219 INFO L471 AbstractCegarLoop]: Abstraction has 114 states and 139 transitions. [2024-10-24 01:13:25,220 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 36 states have (on average 2.25) internal successors, (81), 45 states have internal predecessors, (81), 25 states have call successors, (28), 8 states have call predecessors, (28), 10 states have return successors, (28), 20 states have call predecessors, (28), 24 states have call successors, (28) [2024-10-24 01:13:25,220 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 139 transitions. [2024-10-24 01:13:25,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2024-10-24 01:13:25,220 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 01:13:25,220 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 01:13:25,235 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-10-24 01:13:25,421 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 01:13:25,421 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 01:13:25,422 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 01:13:25,422 INFO L85 PathProgramCache]: Analyzing trace with hash -1774374142, now seen corresponding path program 5 times [2024-10-24 01:13:25,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 01:13:25,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669220186] [2024-10-24 01:13:25,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 01:13:25,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 01:13:25,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-24 01:13:25,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [874622113] [2024-10-24 01:13:25,444 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-24 01:13:25,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 01:13:25,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 01:13:25,445 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 01:13:25,447 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process