./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/verifythis/duplets.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3061b6dc Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/verifythis/duplets.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 ac76721ba91522692e2c3e4d1ea27df0200031dd012c5066cc7280e0ae6e2244 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-3061b6d-m [2024-11-18 13:56:01,308 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-18 13:56:01,354 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-18 13:56:01,360 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-18 13:56:01,361 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-18 13:56:01,384 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-18 13:56:01,384 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-18 13:56:01,384 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-18 13:56:01,385 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-18 13:56:01,386 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-18 13:56:01,386 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-18 13:56:01,386 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-18 13:56:01,387 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-18 13:56:01,387 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-18 13:56:01,388 INFO L153 SettingsManager]: * Use SBE=true [2024-11-18 13:56:01,388 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-18 13:56:01,388 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-18 13:56:01,389 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-18 13:56:01,389 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-18 13:56:01,389 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-18 13:56:01,390 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-18 13:56:01,390 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-18 13:56:01,391 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-18 13:56:01,391 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-18 13:56:01,391 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-18 13:56:01,391 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-18 13:56:01,391 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-18 13:56:01,392 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-18 13:56:01,392 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-18 13:56:01,392 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-18 13:56:01,392 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-18 13:56:01,392 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-18 13:56:01,393 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-18 13:56:01,393 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-18 13:56:01,393 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-18 13:56:01,393 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-18 13:56:01,393 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-18 13:56:01,394 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-18 13:56:01,394 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-18 13:56:01,394 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-18 13:56:01,395 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-18 13:56:01,395 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-18 13:56:01,395 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ac76721ba91522692e2c3e4d1ea27df0200031dd012c5066cc7280e0ae6e2244 [2024-11-18 13:56:01,603 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-18 13:56:01,630 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-18 13:56:01,632 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-18 13:56:01,633 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-18 13:56:01,633 INFO L274 PluginConnector]: CDTParser initialized [2024-11-18 13:56:01,634 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/verifythis/duplets.c [2024-11-18 13:56:02,821 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-18 13:56:02,978 INFO L384 CDTParser]: Found 1 translation units. [2024-11-18 13:56:02,979 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/duplets.c [2024-11-18 13:56:02,986 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6554d7aa5/11615ab8cb284139884a878c1344e96f/FLAG32ab4b6b9 [2024-11-18 13:56:02,998 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6554d7aa5/11615ab8cb284139884a878c1344e96f [2024-11-18 13:56:03,000 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-18 13:56:03,001 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-18 13:56:03,002 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-18 13:56:03,003 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-18 13:56:03,007 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-18 13:56:03,007 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 01:56:02" (1/1) ... [2024-11-18 13:56:03,009 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3dc4480e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:56:03, skipping insertion in model container [2024-11-18 13:56:03,009 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 01:56:02" (1/1) ... [2024-11-18 13:56:03,025 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-18 13:56:03,194 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/duplets.c[485,498] [2024-11-18 13:56:03,221 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-18 13:56:03,231 INFO L200 MainTranslator]: Completed pre-run [2024-11-18 13:56:03,239 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/duplets.c[485,498] [2024-11-18 13:56:03,255 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-18 13:56:03,274 INFO L204 MainTranslator]: Completed translation [2024-11-18 13:56:03,275 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:56:03 WrapperNode [2024-11-18 13:56:03,275 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-18 13:56:03,276 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-18 13:56:03,276 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-18 13:56:03,276 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-18 13:56:03,281 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:56:03" (1/1) ... [2024-11-18 13:56:03,286 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:56:03" (1/1) ... [2024-11-18 13:56:03,304 INFO L138 Inliner]: procedures = 21, calls = 43, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 124 [2024-11-18 13:56:03,307 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-18 13:56:03,307 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-18 13:56:03,307 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-18 13:56:03,307 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-18 13:56:03,315 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:56:03" (1/1) ... [2024-11-18 13:56:03,315 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:56:03" (1/1) ... [2024-11-18 13:56:03,317 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:56:03" (1/1) ... [2024-11-18 13:56:03,332 INFO L175 MemorySlicer]: Split 19 memory accesses to 4 slices as follows [2, 5, 7, 5]. 37 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 5 writes are split as follows [0, 1, 3, 1]. [2024-11-18 13:56:03,333 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:56:03" (1/1) ... [2024-11-18 13:56:03,333 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:56:03" (1/1) ... [2024-11-18 13:56:03,340 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:56:03" (1/1) ... [2024-11-18 13:56:03,342 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:56:03" (1/1) ... [2024-11-18 13:56:03,345 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:56:03" (1/1) ... [2024-11-18 13:56:03,346 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:56:03" (1/1) ... [2024-11-18 13:56:03,347 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-18 13:56:03,348 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-18 13:56:03,348 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-18 13:56:03,348 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-18 13:56:03,349 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:56:03" (1/1) ... [2024-11-18 13:56:03,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-18 13:56:03,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 13:56:03,372 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-18 13:56:03,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-18 13:56:03,415 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-18 13:56:03,416 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-18 13:56:03,416 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-18 13:56:03,416 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-18 13:56:03,416 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-18 13:56:03,416 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-18 13:56:03,416 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-11-18 13:56:03,416 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-18 13:56:03,416 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-18 13:56:03,416 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-18 13:56:03,416 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-18 13:56:03,416 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-11-18 13:56:03,416 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-18 13:56:03,416 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-18 13:56:03,417 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-18 13:56:03,417 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-18 13:56:03,417 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-18 13:56:03,417 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-18 13:56:03,417 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-11-18 13:56:03,417 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-18 13:56:03,417 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-18 13:56:03,417 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-18 13:56:03,491 INFO L238 CfgBuilder]: Building ICFG [2024-11-18 13:56:03,493 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-18 13:56:03,677 INFO L? ?]: Removed 46 outVars from TransFormulas that were not future-live. [2024-11-18 13:56:03,677 INFO L287 CfgBuilder]: Performing block encoding [2024-11-18 13:56:03,687 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-18 13:56:03,688 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-18 13:56:03,688 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 01:56:03 BoogieIcfgContainer [2024-11-18 13:56:03,688 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-18 13:56:03,689 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-18 13:56:03,690 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-18 13:56:03,692 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-18 13:56:03,692 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 01:56:02" (1/3) ... [2024-11-18 13:56:03,693 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9a3ba33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 01:56:03, skipping insertion in model container [2024-11-18 13:56:03,693 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:56:03" (2/3) ... [2024-11-18 13:56:03,693 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9a3ba33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 01:56:03, skipping insertion in model container [2024-11-18 13:56:03,693 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 01:56:03" (3/3) ... [2024-11-18 13:56:03,694 INFO L112 eAbstractionObserver]: Analyzing ICFG duplets.c [2024-11-18 13:56:03,706 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-18 13:56:03,706 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-18 13:56:03,747 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-18 13:56:03,752 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;@4d6a3546, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-18 13:56:03,753 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-18 13:56:03,755 INFO L276 IsEmpty]: Start isEmpty. Operand has 42 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 30 states have internal predecessors, (39), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-18 13:56:03,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-18 13:56:03,760 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 13:56:03,761 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 13:56:03,761 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 13:56:03,765 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 13:56:03,765 INFO L85 PathProgramCache]: Analyzing trace with hash 2002163191, now seen corresponding path program 1 times [2024-11-18 13:56:03,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 13:56:03,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469502873] [2024-11-18 13:56:03,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 13:56:03,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 13:56:03,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 13:56:03,910 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-18 13:56:03,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 13:56:03,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469502873] [2024-11-18 13:56:03,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469502873] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 13:56:03,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131545761] [2024-11-18 13:56:03,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 13:56:03,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 13:56:03,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 13:56:03,914 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 13:56:03,915 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-18 13:56:04,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 13:56:04,013 INFO L255 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 1 conjuncts are in the unsatisfiable core [2024-11-18 13:56:04,016 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 13:56:04,025 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-18 13:56:04,026 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-18 13:56:04,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131545761] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 13:56:04,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-18 13:56:04,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2024-11-18 13:56:04,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063229886] [2024-11-18 13:56:04,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 13:56:04,031 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-18 13:56:04,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 13:56:04,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-18 13:56:04,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-18 13:56:04,047 INFO L87 Difference]: Start difference. First operand has 42 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 30 states have internal predecessors, (39), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 2 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-18 13:56:04,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 13:56:04,061 INFO L93 Difference]: Finished difference Result 81 states and 119 transitions. [2024-11-18 13:56:04,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-18 13:56:04,063 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 33 [2024-11-18 13:56:04,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 13:56:04,068 INFO L225 Difference]: With dead ends: 81 [2024-11-18 13:56:04,068 INFO L226 Difference]: Without dead ends: 38 [2024-11-18 13:56:04,070 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-18 13:56:04,072 INFO L432 NwaCegarLoop]: 53 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-18 13:56:04,072 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-18 13:56:04,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2024-11-18 13:56:04,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2024-11-18 13:56:04,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 27 states have internal predecessors, (32), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-18 13:56:04,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 49 transitions. [2024-11-18 13:56:04,099 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 49 transitions. Word has length 33 [2024-11-18 13:56:04,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 13:56:04,099 INFO L471 AbstractCegarLoop]: Abstraction has 38 states and 49 transitions. [2024-11-18 13:56:04,099 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-18 13:56:04,100 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 49 transitions. [2024-11-18 13:56:04,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-18 13:56:04,101 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 13:56:04,101 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 13:56:04,113 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-18 13:56:04,301 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2024-11-18 13:56:04,302 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 13:56:04,302 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 13:56:04,302 INFO L85 PathProgramCache]: Analyzing trace with hash -955676640, now seen corresponding path program 1 times [2024-11-18 13:56:04,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 13:56:04,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790289851] [2024-11-18 13:56:04,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 13:56:04,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 13:56:04,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 13:56:04,672 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-18 13:56:04,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 13:56:04,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790289851] [2024-11-18 13:56:04,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790289851] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 13:56:04,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017618979] [2024-11-18 13:56:04,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 13:56:04,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 13:56:04,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 13:56:04,675 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 13:56:04,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-18 13:56:04,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 13:56:04,761 INFO L255 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-18 13:56:04,763 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 13:56:04,821 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-18 13:56:04,821 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 13:56:04,972 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-18 13:56:04,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017618979] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 13:56:04,972 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 13:56:04,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2024-11-18 13:56:04,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640961031] [2024-11-18 13:56:04,972 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 13:56:04,973 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-18 13:56:04,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 13:56:04,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-18 13:56:04,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-11-18 13:56:04,974 INFO L87 Difference]: Start difference. First operand 38 states and 49 transitions. Second operand has 11 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 11 states have internal predecessors, (25), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-18 13:56:05,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 13:56:05,089 INFO L93 Difference]: Finished difference Result 67 states and 88 transitions. [2024-11-18 13:56:05,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-18 13:56:05,089 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 11 states have internal predecessors, (25), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 33 [2024-11-18 13:56:05,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 13:56:05,090 INFO L225 Difference]: With dead ends: 67 [2024-11-18 13:56:05,091 INFO L226 Difference]: Without dead ends: 48 [2024-11-18 13:56:05,092 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2024-11-18 13:56:05,094 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 64 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 13:56:05,094 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 188 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 13:56:05,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2024-11-18 13:56:05,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 39. [2024-11-18 13:56:05,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 28 states have internal predecessors, (33), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-18 13:56:05,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 50 transitions. [2024-11-18 13:56:05,105 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 50 transitions. Word has length 33 [2024-11-18 13:56:05,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 13:56:05,106 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 50 transitions. [2024-11-18 13:56:05,106 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 11 states have internal predecessors, (25), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-18 13:56:05,106 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 50 transitions. [2024-11-18 13:56:05,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-18 13:56:05,107 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 13:56:05,107 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 13:56:05,120 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-18 13:56:05,311 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,SelfDestructingSolverStorable1 [2024-11-18 13:56:05,312 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 13:56:05,312 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 13:56:05,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1239114352, now seen corresponding path program 1 times [2024-11-18 13:56:05,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 13:56:05,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368817706] [2024-11-18 13:56:05,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 13:56:05,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 13:56:05,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 13:56:05,401 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-18 13:56:05,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 13:56:05,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368817706] [2024-11-18 13:56:05,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368817706] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 13:56:05,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-18 13:56:05,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-18 13:56:05,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025031801] [2024-11-18 13:56:05,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 13:56:05,402 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-18 13:56:05,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 13:56:05,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-18 13:56:05,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-18 13:56:05,403 INFO L87 Difference]: Start difference. First operand 39 states and 50 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-18 13:56:05,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 13:56:05,442 INFO L93 Difference]: Finished difference Result 57 states and 73 transitions. [2024-11-18 13:56:05,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-18 13:56:05,442 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 34 [2024-11-18 13:56:05,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 13:56:05,443 INFO L225 Difference]: With dead ends: 57 [2024-11-18 13:56:05,443 INFO L226 Difference]: Without dead ends: 55 [2024-11-18 13:56:05,444 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-18 13:56:05,444 INFO L432 NwaCegarLoop]: 48 mSDtfsCounter, 11 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-18 13:56:05,445 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 229 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-18 13:56:05,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-11-18 13:56:05,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 45. [2024-11-18 13:56:05,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 33 states have internal predecessors, (37), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-18 13:56:05,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 56 transitions. [2024-11-18 13:56:05,457 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 56 transitions. Word has length 34 [2024-11-18 13:56:05,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 13:56:05,457 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 56 transitions. [2024-11-18 13:56:05,457 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-18 13:56:05,457 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 56 transitions. [2024-11-18 13:56:05,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-18 13:56:05,470 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 13:56:05,471 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 13:56:05,471 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-18 13:56:05,471 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 13:56:05,472 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 13:56:05,472 INFO L85 PathProgramCache]: Analyzing trace with hash -238731315, now seen corresponding path program 1 times [2024-11-18 13:56:05,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 13:56:05,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691494243] [2024-11-18 13:56:05,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 13:56:05,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 13:56:05,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 13:56:05,800 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-18 13:56:05,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 13:56:05,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691494243] [2024-11-18 13:56:05,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691494243] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 13:56:05,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-18 13:56:05,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-11-18 13:56:05,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544989634] [2024-11-18 13:56:05,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 13:56:05,801 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-18 13:56:05,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 13:56:05,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-18 13:56:05,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-11-18 13:56:05,802 INFO L87 Difference]: Start difference. First operand 45 states and 56 transitions. Second operand has 11 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-18 13:56:06,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 13:56:06,006 INFO L93 Difference]: Finished difference Result 85 states and 109 transitions. [2024-11-18 13:56:06,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-18 13:56:06,008 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 36 [2024-11-18 13:56:06,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 13:56:06,010 INFO L225 Difference]: With dead ends: 85 [2024-11-18 13:56:06,011 INFO L226 Difference]: Without dead ends: 55 [2024-11-18 13:56:06,011 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2024-11-18 13:56:06,013 INFO L432 NwaCegarLoop]: 41 mSDtfsCounter, 35 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 13:56:06,014 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 317 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 13:56:06,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-11-18 13:56:06,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 46. [2024-11-18 13:56:06,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 32 states have (on average 1.1875) internal successors, (38), 34 states have internal predecessors, (38), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-18 13:56:06,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 57 transitions. [2024-11-18 13:56:06,025 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 57 transitions. Word has length 36 [2024-11-18 13:56:06,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 13:56:06,026 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 57 transitions. [2024-11-18 13:56:06,026 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-18 13:56:06,026 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 57 transitions. [2024-11-18 13:56:06,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-18 13:56:06,027 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 13:56:06,028 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 13:56:06,028 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-18 13:56:06,028 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 13:56:06,029 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 13:56:06,029 INFO L85 PathProgramCache]: Analyzing trace with hash -1090680823, now seen corresponding path program 1 times [2024-11-18 13:56:06,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 13:56:06,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720115388] [2024-11-18 13:56:06,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 13:56:06,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 13:56:06,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 13:56:06,092 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-18 13:56:06,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 13:56:06,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720115388] [2024-11-18 13:56:06,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720115388] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 13:56:06,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023052913] [2024-11-18 13:56:06,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 13:56:06,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 13:56:06,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 13:56:06,095 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 13:56:06,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-18 13:56:06,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 13:56:06,167 INFO L255 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-18 13:56:06,169 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 13:56:06,182 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-18 13:56:06,182 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 13:56:06,216 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-18 13:56:06,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023052913] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 13:56:06,217 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 13:56:06,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2024-11-18 13:56:06,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717322259] [2024-11-18 13:56:06,217 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 13:56:06,217 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-18 13:56:06,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 13:56:06,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-18 13:56:06,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-18 13:56:06,218 INFO L87 Difference]: Start difference. First operand 46 states and 57 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-18 13:56:06,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 13:56:06,248 INFO L93 Difference]: Finished difference Result 68 states and 86 transitions. [2024-11-18 13:56:06,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-18 13:56:06,248 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 39 [2024-11-18 13:56:06,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 13:56:06,249 INFO L225 Difference]: With dead ends: 68 [2024-11-18 13:56:06,249 INFO L226 Difference]: Without dead ends: 49 [2024-11-18 13:56:06,250 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 75 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-11-18 13:56:06,250 INFO L432 NwaCegarLoop]: 44 mSDtfsCounter, 3 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-18 13:56:06,250 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 122 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-18 13:56:06,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2024-11-18 13:56:06,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2024-11-18 13:56:06,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 35 states have (on average 1.2) internal successors, (42), 37 states have internal predecessors, (42), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-18 13:56:06,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 61 transitions. [2024-11-18 13:56:06,259 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 61 transitions. Word has length 39 [2024-11-18 13:56:06,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 13:56:06,259 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 61 transitions. [2024-11-18 13:56:06,259 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-18 13:56:06,260 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 61 transitions. [2024-11-18 13:56:06,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-18 13:56:06,262 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 13:56:06,262 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 13:56:06,275 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-18 13:56:06,462 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 13:56:06,463 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 13:56:06,463 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 13:56:06,463 INFO L85 PathProgramCache]: Analyzing trace with hash 1516133537, now seen corresponding path program 1 times [2024-11-18 13:56:06,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 13:56:06,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692498893] [2024-11-18 13:56:06,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 13:56:06,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 13:56:06,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 13:56:06,728 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-18 13:56:06,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 13:56:06,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692498893] [2024-11-18 13:56:06,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692498893] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 13:56:06,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-18 13:56:06,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-11-18 13:56:06,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282089568] [2024-11-18 13:56:06,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 13:56:06,729 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-18 13:56:06,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 13:56:06,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-18 13:56:06,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2024-11-18 13:56:06,730 INFO L87 Difference]: Start difference. First operand 49 states and 61 transitions. Second operand has 11 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 10 states have internal predecessors, (21), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-18 13:56:06,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 13:56:06,922 INFO L93 Difference]: Finished difference Result 82 states and 105 transitions. [2024-11-18 13:56:06,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-18 13:56:06,922 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 10 states have internal predecessors, (21), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 41 [2024-11-18 13:56:06,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 13:56:06,923 INFO L225 Difference]: With dead ends: 82 [2024-11-18 13:56:06,923 INFO L226 Difference]: Without dead ends: 68 [2024-11-18 13:56:06,923 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2024-11-18 13:56:06,924 INFO L432 NwaCegarLoop]: 41 mSDtfsCounter, 19 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 13:56:06,924 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 331 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 13:56:06,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2024-11-18 13:56:06,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 61. [2024-11-18 13:56:06,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 44 states have (on average 1.2045454545454546) internal successors, (53), 47 states have internal predecessors, (53), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (11), 9 states have call predecessors, (11), 11 states have call successors, (11) [2024-11-18 13:56:06,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 76 transitions. [2024-11-18 13:56:06,933 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 76 transitions. Word has length 41 [2024-11-18 13:56:06,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 13:56:06,934 INFO L471 AbstractCegarLoop]: Abstraction has 61 states and 76 transitions. [2024-11-18 13:56:06,934 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 10 states have internal predecessors, (21), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-18 13:56:06,934 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 76 transitions. [2024-11-18 13:56:06,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-18 13:56:06,935 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 13:56:06,935 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 13:56:06,935 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-18 13:56:06,935 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 13:56:06,935 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 13:56:06,935 INFO L85 PathProgramCache]: Analyzing trace with hash -2058958012, now seen corresponding path program 2 times [2024-11-18 13:56:06,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 13:56:06,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525384090] [2024-11-18 13:56:06,936 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-18 13:56:06,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 13:56:06,969 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-18 13:56:06,973 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 13:56:07,669 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-18 13:56:07,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 13:56:07,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525384090] [2024-11-18 13:56:07,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525384090] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 13:56:07,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130407918] [2024-11-18 13:56:07,670 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-18 13:56:07,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 13:56:07,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 13:56:07,674 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 13:56:07,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-18 13:56:07,755 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-18 13:56:07,756 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 13:56:07,760 INFO L255 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 54 conjuncts are in the unsatisfiable core [2024-11-18 13:56:07,765 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 13:56:08,009 INFO L349 Elim1Store]: treesize reduction 29, result has 39.6 percent of original size [2024-11-18 13:56:08,010 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 1 case distinctions, treesize of input 38 treesize of output 19 [2024-11-18 13:56:09,216 INFO L349 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2024-11-18 13:56:09,216 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 46 [2024-11-18 13:56:09,516 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-18 13:56:09,516 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 13:56:09,763 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-18 13:56:09,763 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 515 treesize of output 447 [2024-11-18 13:56:13,025 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-18 13:56:13,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130407918] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 13:56:13,025 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 13:56:13,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 38 [2024-11-18 13:56:13,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672159340] [2024-11-18 13:56:13,025 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 13:56:13,026 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-11-18 13:56:13,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 13:56:13,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-11-18 13:56:13,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1267, Unknown=1, NotChecked=0, Total=1406 [2024-11-18 13:56:13,027 INFO L87 Difference]: Start difference. First operand 61 states and 76 transitions. Second operand has 38 states, 29 states have (on average 1.896551724137931) internal successors, (55), 29 states have internal predecessors, (55), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-18 13:56:15,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 13:56:15,038 INFO L93 Difference]: Finished difference Result 115 states and 149 transitions. [2024-11-18 13:56:15,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-18 13:56:15,039 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 29 states have (on average 1.896551724137931) internal successors, (55), 29 states have internal predecessors, (55), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 42 [2024-11-18 13:56:15,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 13:56:15,040 INFO L225 Difference]: With dead ends: 115 [2024-11-18 13:56:15,040 INFO L226 Difference]: Without dead ends: 82 [2024-11-18 13:56:15,041 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 563 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=403, Invalid=2566, Unknown=1, NotChecked=0, Total=2970 [2024-11-18 13:56:15,041 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 187 mSDsluCounter, 577 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 612 SdHoareTripleChecker+Invalid, 499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-18 13:56:15,042 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [187 Valid, 612 Invalid, 499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 477 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-18 13:56:15,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2024-11-18 13:56:15,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 67. [2024-11-18 13:56:15,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 50 states have (on average 1.2) internal successors, (60), 53 states have internal predecessors, (60), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (11), 9 states have call predecessors, (11), 11 states have call successors, (11) [2024-11-18 13:56:15,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 83 transitions. [2024-11-18 13:56:15,051 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 83 transitions. Word has length 42 [2024-11-18 13:56:15,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 13:56:15,052 INFO L471 AbstractCegarLoop]: Abstraction has 67 states and 83 transitions. [2024-11-18 13:56:15,052 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 29 states have (on average 1.896551724137931) internal successors, (55), 29 states have internal predecessors, (55), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-18 13:56:15,055 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 83 transitions. [2024-11-18 13:56:15,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-18 13:56:15,057 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 13:56:15,057 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 13:56:15,069 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-18 13:56:15,259 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 13:56:15,259 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 13:56:15,260 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 13:56:15,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1839687504, now seen corresponding path program 1 times [2024-11-18 13:56:15,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 13:56:15,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893313692] [2024-11-18 13:56:15,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 13:56:15,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 13:56:15,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 13:56:15,445 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-18 13:56:15,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 13:56:15,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893313692] [2024-11-18 13:56:15,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893313692] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 13:56:15,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-18 13:56:15,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-18 13:56:15,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009009731] [2024-11-18 13:56:15,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 13:56:15,446 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-18 13:56:15,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 13:56:15,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-18 13:56:15,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-11-18 13:56:15,447 INFO L87 Difference]: Start difference. First operand 67 states and 83 transitions. Second operand has 9 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-18 13:56:15,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 13:56:15,557 INFO L93 Difference]: Finished difference Result 84 states and 105 transitions. [2024-11-18 13:56:15,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-18 13:56:15,557 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 48 [2024-11-18 13:56:15,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 13:56:15,558 INFO L225 Difference]: With dead ends: 84 [2024-11-18 13:56:15,558 INFO L226 Difference]: Without dead ends: 82 [2024-11-18 13:56:15,559 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-11-18 13:56:15,559 INFO L432 NwaCegarLoop]: 43 mSDtfsCounter, 13 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 13:56:15,559 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 275 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 13:56:15,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2024-11-18 13:56:15,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 77. [2024-11-18 13:56:15,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 57 states have (on average 1.2105263157894737) internal successors, (69), 60 states have internal predecessors, (69), 14 states have call successors, (14), 5 states have call predecessors, (14), 5 states have return successors, (13), 11 states have call predecessors, (13), 13 states have call successors, (13) [2024-11-18 13:56:15,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 96 transitions. [2024-11-18 13:56:15,568 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 96 transitions. Word has length 48 [2024-11-18 13:56:15,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 13:56:15,568 INFO L471 AbstractCegarLoop]: Abstraction has 77 states and 96 transitions. [2024-11-18 13:56:15,569 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-18 13:56:15,569 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 96 transitions. [2024-11-18 13:56:15,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-18 13:56:15,571 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 13:56:15,571 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 13:56:15,572 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-18 13:56:15,572 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 13:56:15,572 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 13:56:15,572 INFO L85 PathProgramCache]: Analyzing trace with hash -1837840462, now seen corresponding path program 1 times [2024-11-18 13:56:15,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 13:56:15,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459984956] [2024-11-18 13:56:15,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 13:56:15,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 13:56:15,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 13:56:15,682 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-18 13:56:15,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 13:56:15,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459984956] [2024-11-18 13:56:15,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459984956] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 13:56:15,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-18 13:56:15,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-18 13:56:15,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405781021] [2024-11-18 13:56:15,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 13:56:15,683 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-18 13:56:15,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 13:56:15,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-18 13:56:15,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-18 13:56:15,686 INFO L87 Difference]: Start difference. First operand 77 states and 96 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-18 13:56:15,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 13:56:15,746 INFO L93 Difference]: Finished difference Result 94 states and 117 transitions. [2024-11-18 13:56:15,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-18 13:56:15,746 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 48 [2024-11-18 13:56:15,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 13:56:15,747 INFO L225 Difference]: With dead ends: 94 [2024-11-18 13:56:15,747 INFO L226 Difference]: Without dead ends: 83 [2024-11-18 13:56:15,747 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-11-18 13:56:15,748 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 5 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-18 13:56:15,748 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 173 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-18 13:56:15,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2024-11-18 13:56:15,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 79. [2024-11-18 13:56:15,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 59 states have (on average 1.2033898305084745) internal successors, (71), 61 states have internal predecessors, (71), 14 states have call successors, (14), 5 states have call predecessors, (14), 5 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2024-11-18 13:56:15,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 98 transitions. [2024-11-18 13:56:15,762 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 98 transitions. Word has length 48 [2024-11-18 13:56:15,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 13:56:15,762 INFO L471 AbstractCegarLoop]: Abstraction has 79 states and 98 transitions. [2024-11-18 13:56:15,763 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-18 13:56:15,763 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 98 transitions. [2024-11-18 13:56:15,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-18 13:56:15,765 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 13:56:15,765 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 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, 1, 1, 1, 1, 1] [2024-11-18 13:56:15,765 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-18 13:56:15,765 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 13:56:15,765 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 13:56:15,765 INFO L85 PathProgramCache]: Analyzing trace with hash -803611186, now seen corresponding path program 1 times [2024-11-18 13:56:15,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 13:56:15,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927302960] [2024-11-18 13:56:15,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 13:56:15,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 13:56:15,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 13:56:16,004 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-18 13:56:16,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 13:56:16,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927302960] [2024-11-18 13:56:16,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927302960] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 13:56:16,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481133575] [2024-11-18 13:56:16,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 13:56:16,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 13:56:16,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 13:56:16,007 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 13:56:16,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-18 13:56:16,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 13:56:16,082 INFO L255 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-18 13:56:16,084 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 13:56:16,192 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-18 13:56:16,208 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-11-18 13:56:16,231 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-18 13:56:16,233 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 13:56:16,278 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2024-11-18 13:56:16,415 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-18 13:56:16,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481133575] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 13:56:16,415 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 13:56:16,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 20 [2024-11-18 13:56:16,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351142398] [2024-11-18 13:56:16,415 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 13:56:16,416 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-18 13:56:16,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 13:56:16,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-18 13:56:16,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2024-11-18 13:56:16,417 INFO L87 Difference]: Start difference. First operand 79 states and 98 transitions. Second operand has 20 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 states have internal predecessors, (57), 5 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-18 13:56:16,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 13:56:16,631 INFO L93 Difference]: Finished difference Result 99 states and 124 transitions. [2024-11-18 13:56:16,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-18 13:56:16,632 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 states have internal predecessors, (57), 5 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 50 [2024-11-18 13:56:16,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 13:56:16,633 INFO L225 Difference]: With dead ends: 99 [2024-11-18 13:56:16,633 INFO L226 Difference]: Without dead ends: 97 [2024-11-18 13:56:16,633 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 89 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=154, Invalid=658, Unknown=0, NotChecked=0, Total=812 [2024-11-18 13:56:16,634 INFO L432 NwaCegarLoop]: 44 mSDtfsCounter, 22 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 13:56:16,634 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 348 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 13:56:16,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2024-11-18 13:56:16,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 84. [2024-11-18 13:56:16,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 62 states have (on average 1.1935483870967742) internal successors, (74), 65 states have internal predecessors, (74), 15 states have call successors, (15), 6 states have call predecessors, (15), 6 states have return successors, (14), 12 states have call predecessors, (14), 14 states have call successors, (14) [2024-11-18 13:56:16,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 103 transitions. [2024-11-18 13:56:16,644 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 103 transitions. Word has length 50 [2024-11-18 13:56:16,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 13:56:16,645 INFO L471 AbstractCegarLoop]: Abstraction has 84 states and 103 transitions. [2024-11-18 13:56:16,645 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 states have internal predecessors, (57), 5 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-18 13:56:16,645 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 103 transitions. [2024-11-18 13:56:16,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-18 13:56:16,646 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 13:56:16,646 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 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, 1, 1, 1, 1, 1] [2024-11-18 13:56:16,659 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-18 13:56:16,846 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-18 13:56:16,847 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 13:56:16,847 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 13:56:16,847 INFO L85 PathProgramCache]: Analyzing trace with hash -801764144, now seen corresponding path program 1 times [2024-11-18 13:56:16,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 13:56:16,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654691134] [2024-11-18 13:56:16,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 13:56:16,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 13:56:16,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 13:56:16,957 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-11-18 13:56:16,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 13:56:16,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654691134] [2024-11-18 13:56:16,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654691134] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 13:56:16,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563401770] [2024-11-18 13:56:16,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 13:56:16,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 13:56:16,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 13:56:16,960 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 13:56:16,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-18 13:56:17,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 13:56:17,037 INFO L255 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-18 13:56:17,039 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 13:56:17,095 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-18 13:56:17,118 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-18 13:56:17,120 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-11-18 13:56:17,120 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-18 13:56:17,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563401770] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 13:56:17,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-18 13:56:17,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 8 [2024-11-18 13:56:17,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394949172] [2024-11-18 13:56:17,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 13:56:17,121 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-18 13:56:17,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 13:56:17,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-18 13:56:17,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-11-18 13:56:17,122 INFO L87 Difference]: Start difference. First operand 84 states and 103 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-18 13:56:21,145 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-18 13:56:21,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 13:56:21,199 INFO L93 Difference]: Finished difference Result 122 states and 143 transitions. [2024-11-18 13:56:21,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-18 13:56:21,199 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 50 [2024-11-18 13:56:21,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 13:56:21,200 INFO L225 Difference]: With dead ends: 122 [2024-11-18 13:56:21,200 INFO L226 Difference]: Without dead ends: 103 [2024-11-18 13:56:21,200 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-11-18 13:56:21,201 INFO L432 NwaCegarLoop]: 60 mSDtfsCounter, 13 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2024-11-18 13:56:21,201 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 252 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 91 Invalid, 1 Unknown, 0 Unchecked, 4.1s Time] [2024-11-18 13:56:21,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2024-11-18 13:56:21,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 101. [2024-11-18 13:56:21,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 73 states have (on average 1.1643835616438356) internal successors, (85), 77 states have internal predecessors, (85), 18 states have call successors, (18), 9 states have call predecessors, (18), 9 states have return successors, (16), 14 states have call predecessors, (16), 16 states have call successors, (16) [2024-11-18 13:56:21,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 119 transitions. [2024-11-18 13:56:21,220 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 119 transitions. Word has length 50 [2024-11-18 13:56:21,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 13:56:21,221 INFO L471 AbstractCegarLoop]: Abstraction has 101 states and 119 transitions. [2024-11-18 13:56:21,221 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-18 13:56:21,221 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 119 transitions. [2024-11-18 13:56:21,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-18 13:56:21,221 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 13:56:21,221 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 13:56:21,235 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-18 13:56:21,426 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 13:56:21,427 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 13:56:21,427 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 13:56:21,427 INFO L85 PathProgramCache]: Analyzing trace with hash -604370533, now seen corresponding path program 1 times [2024-11-18 13:56:21,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 13:56:21,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93362719] [2024-11-18 13:56:21,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 13:56:21,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 13:56:21,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 13:56:21,708 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-18 13:56:21,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 13:56:21,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93362719] [2024-11-18 13:56:21,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93362719] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 13:56:21,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568808102] [2024-11-18 13:56:21,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 13:56:21,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 13:56:21,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 13:56:21,711 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) [2024-11-18 13:56:21,712 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-18 13:56:21,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 13:56:21,797 INFO L255 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-11-18 13:56:21,799 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 13:56:21,837 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-18 13:56:21,839 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-18 13:56:22,121 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-18 13:56:22,121 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 13:56:26,281 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 50 [2024-11-18 13:56:26,286 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2024-11-18 13:56:26,348 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-18 13:56:26,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568808102] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 13:56:26,349 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 13:56:26,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 12] total 26 [2024-11-18 13:56:26,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250415496] [2024-11-18 13:56:26,349 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 13:56:26,349 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-18 13:56:26,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 13:56:26,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-18 13:56:26,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=559, Unknown=1, NotChecked=0, Total=650 [2024-11-18 13:56:26,350 INFO L87 Difference]: Start difference. First operand 101 states and 119 transitions. Second operand has 26 states, 21 states have (on average 2.380952380952381) internal successors, (50), 25 states have internal predecessors, (50), 8 states have call successors, (14), 4 states have call predecessors, (14), 5 states have return successors, (11), 3 states have call predecessors, (11), 6 states have call successors, (11) [2024-11-18 13:56:26,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 13:56:26,735 INFO L93 Difference]: Finished difference Result 172 states and 201 transitions. [2024-11-18 13:56:26,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-18 13:56:26,736 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 21 states have (on average 2.380952380952381) internal successors, (50), 25 states have internal predecessors, (50), 8 states have call successors, (14), 4 states have call predecessors, (14), 5 states have return successors, (11), 3 states have call predecessors, (11), 6 states have call successors, (11) Word has length 54 [2024-11-18 13:56:26,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 13:56:26,737 INFO L225 Difference]: With dead ends: 172 [2024-11-18 13:56:26,737 INFO L226 Difference]: Without dead ends: 168 [2024-11-18 13:56:26,737 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 91 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=149, Invalid=906, Unknown=1, NotChecked=0, Total=1056 [2024-11-18 13:56:26,738 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 57 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 397 SdHoareTripleChecker+Invalid, 435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-18 13:56:26,738 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 397 Invalid, 435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-18 13:56:26,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2024-11-18 13:56:26,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 162. [2024-11-18 13:56:26,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 114 states have (on average 1.131578947368421) internal successors, (129), 121 states have internal predecessors, (129), 32 states have call successors, (32), 16 states have call predecessors, (32), 15 states have return successors, (29), 24 states have call predecessors, (29), 29 states have call successors, (29) [2024-11-18 13:56:26,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 190 transitions. [2024-11-18 13:56:26,750 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 190 transitions. Word has length 54 [2024-11-18 13:56:26,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 13:56:26,750 INFO L471 AbstractCegarLoop]: Abstraction has 162 states and 190 transitions. [2024-11-18 13:56:26,750 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 21 states have (on average 2.380952380952381) internal successors, (50), 25 states have internal predecessors, (50), 8 states have call successors, (14), 4 states have call predecessors, (14), 5 states have return successors, (11), 3 states have call predecessors, (11), 6 states have call successors, (11) [2024-11-18 13:56:26,750 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 190 transitions. [2024-11-18 13:56:26,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-11-18 13:56:26,751 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 13:56:26,751 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 13:56:26,763 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-18 13:56:26,951 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 13:56:26,952 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 13:56:26,952 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 13:56:26,952 INFO L85 PathProgramCache]: Analyzing trace with hash -956600393, now seen corresponding path program 3 times [2024-11-18 13:56:26,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 13:56:26,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674790026] [2024-11-18 13:56:26,952 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-18 13:56:26,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 13:56:26,986 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-18 13:56:26,986 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 13:56:30,814 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 9 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-18 13:56:30,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 13:56:30,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674790026] [2024-11-18 13:56:30,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674790026] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 13:56:30,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549379464] [2024-11-18 13:56:30,815 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-18 13:56:30,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 13:56:30,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 13:56:30,817 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) [2024-11-18 13:56:30,818 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-18 13:56:30,899 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-18 13:56:30,900 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 13:56:30,901 INFO L255 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 79 conjuncts are in the unsatisfiable core [2024-11-18 13:56:30,903 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 13:56:30,907 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 7 treesize of output 6 [2024-11-18 13:56:31,344 INFO L349 Elim1Store]: treesize reduction 41, result has 18.0 percent of original size [2024-11-18 13:56:31,344 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 45 [2024-11-18 13:56:32,522 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 67 treesize of output 49 [2024-11-18 13:56:32,623 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 28 proven. 17 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-18 13:56:32,624 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 13:56:33,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549379464] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 13:56:33,727 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-18 13:56:33,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 22] total 47 [2024-11-18 13:56:33,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513434349] [2024-11-18 13:56:33,727 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-18 13:56:33,727 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-11-18 13:56:33,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 13:56:33,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-11-18 13:56:33,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=405, Invalid=3627, Unknown=0, NotChecked=0, Total=4032 [2024-11-18 13:56:33,729 INFO L87 Difference]: Start difference. First operand 162 states and 190 transitions. Second operand has 47 states, 42 states have (on average 1.4761904761904763) internal successors, (62), 42 states have internal predecessors, (62), 8 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-18 13:56:43,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 13:56:43,689 INFO L93 Difference]: Finished difference Result 274 states and 333 transitions. [2024-11-18 13:56:43,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-11-18 13:56:43,689 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 42 states have (on average 1.4761904761904763) internal successors, (62), 42 states have internal predecessors, (62), 8 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) Word has length 51 [2024-11-18 13:56:43,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 13:56:43,691 INFO L225 Difference]: With dead ends: 274 [2024-11-18 13:56:43,691 INFO L226 Difference]: Without dead ends: 198 [2024-11-18 13:56:43,693 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2378 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=1171, Invalid=7201, Unknown=0, NotChecked=0, Total=8372 [2024-11-18 13:56:43,693 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 229 mSDsluCounter, 844 mSDsCounter, 0 mSdLazyCounter, 1141 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 883 SdHoareTripleChecker+Invalid, 1188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-11-18 13:56:43,693 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [230 Valid, 883 Invalid, 1188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1141 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-11-18 13:56:43,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2024-11-18 13:56:43,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 179. [2024-11-18 13:56:43,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 130 states have (on average 1.1538461538461537) internal successors, (150), 137 states have internal predecessors, (150), 32 states have call successors, (32), 17 states have call predecessors, (32), 16 states have return successors, (29), 24 states have call predecessors, (29), 29 states have call successors, (29) [2024-11-18 13:56:43,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 211 transitions. [2024-11-18 13:56:43,734 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 211 transitions. Word has length 51 [2024-11-18 13:56:43,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 13:56:43,735 INFO L471 AbstractCegarLoop]: Abstraction has 179 states and 211 transitions. [2024-11-18 13:56:43,735 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 42 states have (on average 1.4761904761904763) internal successors, (62), 42 states have internal predecessors, (62), 8 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-18 13:56:43,735 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 211 transitions. [2024-11-18 13:56:43,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-11-18 13:56:43,736 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 13:56:43,736 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 13:56:43,749 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-18 13:56:43,936 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,SelfDestructingSolverStorable12 [2024-11-18 13:56:43,937 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 13:56:43,937 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 13:56:43,937 INFO L85 PathProgramCache]: Analyzing trace with hash -24442395, now seen corresponding path program 1 times [2024-11-18 13:56:43,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 13:56:43,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933721210] [2024-11-18 13:56:43,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 13:56:43,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 13:56:43,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 13:56:44,062 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-18 13:56:44,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 13:56:44,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933721210] [2024-11-18 13:56:44,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933721210] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 13:56:44,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407678172] [2024-11-18 13:56:44,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 13:56:44,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 13:56:44,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 13:56:44,065 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) [2024-11-18 13:56:44,066 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-18 13:56:44,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 13:56:44,154 INFO L255 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-18 13:56:44,156 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 13:56:44,223 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-18 13:56:44,274 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-18 13:56:44,276 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-18 13:56:44,276 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 13:56:44,302 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2024-11-18 13:56:44,400 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-18 13:56:44,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407678172] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 13:56:44,400 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 13:56:44,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 13 [2024-11-18 13:56:44,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252696542] [2024-11-18 13:56:44,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 13:56:44,401 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-18 13:56:44,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 13:56:44,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-18 13:56:44,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2024-11-18 13:56:44,401 INFO L87 Difference]: Start difference. First operand 179 states and 211 transitions. Second operand has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 13 states have internal predecessors, (53), 4 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2024-11-18 13:56:48,431 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] [2024-11-18 13:56:48,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 13:56:48,607 INFO L93 Difference]: Finished difference Result 200 states and 232 transitions. [2024-11-18 13:56:48,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-18 13:56:48,611 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 13 states have internal predecessors, (53), 4 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 57 [2024-11-18 13:56:48,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 13:56:48,614 INFO L225 Difference]: With dead ends: 200 [2024-11-18 13:56:48,614 INFO L226 Difference]: Without dead ends: 182 [2024-11-18 13:56:48,615 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 105 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2024-11-18 13:56:48,616 INFO L432 NwaCegarLoop]: 52 mSDtfsCounter, 18 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2024-11-18 13:56:48,616 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 376 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 240 Invalid, 1 Unknown, 0 Unchecked, 4.1s Time] [2024-11-18 13:56:48,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2024-11-18 13:56:48,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 177. [2024-11-18 13:56:48,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 130 states have (on average 1.1384615384615384) internal successors, (148), 135 states have internal predecessors, (148), 30 states have call successors, (30), 17 states have call predecessors, (30), 16 states have return successors, (27), 24 states have call predecessors, (27), 27 states have call successors, (27) [2024-11-18 13:56:48,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 205 transitions. [2024-11-18 13:56:48,644 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 205 transitions. Word has length 57 [2024-11-18 13:56:48,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 13:56:48,645 INFO L471 AbstractCegarLoop]: Abstraction has 177 states and 205 transitions. [2024-11-18 13:56:48,645 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 13 states have internal predecessors, (53), 4 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2024-11-18 13:56:48,645 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 205 transitions. [2024-11-18 13:56:48,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-11-18 13:56:48,646 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 13:56:48,646 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 13:56:48,659 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-18 13:56:48,846 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,SelfDestructingSolverStorable13 [2024-11-18 13:56:48,847 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 13:56:48,847 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 13:56:48,847 INFO L85 PathProgramCache]: Analyzing trace with hash -173627580, now seen corresponding path program 1 times [2024-11-18 13:56:48,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 13:56:48,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495686346] [2024-11-18 13:56:48,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 13:56:48,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 13:56:48,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 13:56:49,269 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-11-18 13:56:49,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 13:56:49,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495686346] [2024-11-18 13:56:49,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495686346] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 13:56:49,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-18 13:56:49,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-11-18 13:56:49,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302903827] [2024-11-18 13:56:49,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 13:56:49,272 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-18 13:56:49,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 13:56:49,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-18 13:56:49,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-11-18 13:56:49,273 INFO L87 Difference]: Start difference. First operand 177 states and 205 transitions. Second operand has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 4 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2024-11-18 13:56:49,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 13:56:49,457 INFO L93 Difference]: Finished difference Result 187 states and 215 transitions. [2024-11-18 13:56:49,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-18 13:56:49,458 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 4 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 60 [2024-11-18 13:56:49,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 13:56:49,459 INFO L225 Difference]: With dead ends: 187 [2024-11-18 13:56:49,459 INFO L226 Difference]: Without dead ends: 139 [2024-11-18 13:56:49,459 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-11-18 13:56:49,460 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 28 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 13:56:49,460 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 242 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 13:56:49,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2024-11-18 13:56:49,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2024-11-18 13:56:49,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 104 states have (on average 1.1538461538461537) internal successors, (120), 108 states have internal predecessors, (120), 22 states have call successors, (22), 12 states have call predecessors, (22), 12 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2024-11-18 13:56:49,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 161 transitions. [2024-11-18 13:56:49,480 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 161 transitions. Word has length 60 [2024-11-18 13:56:49,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 13:56:49,480 INFO L471 AbstractCegarLoop]: Abstraction has 139 states and 161 transitions. [2024-11-18 13:56:49,480 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 4 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2024-11-18 13:56:49,480 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 161 transitions. [2024-11-18 13:56:49,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-11-18 13:56:49,481 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 13:56:49,481 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 13:56:49,481 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-18 13:56:49,481 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 13:56:49,481 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 13:56:49,482 INFO L85 PathProgramCache]: Analyzing trace with hash 876326939, now seen corresponding path program 1 times [2024-11-18 13:56:49,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 13:56:49,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481146983] [2024-11-18 13:56:49,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 13:56:49,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 13:56:49,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 13:56:49,746 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-18 13:56:49,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 13:56:49,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481146983] [2024-11-18 13:56:49,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481146983] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 13:56:49,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-18 13:56:49,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-11-18 13:56:49,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390757488] [2024-11-18 13:56:49,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 13:56:49,747 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-18 13:56:49,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 13:56:49,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-18 13:56:49,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-11-18 13:56:49,748 INFO L87 Difference]: Start difference. First operand 139 states and 161 transitions. Second operand has 11 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-18 13:56:49,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 13:56:49,876 INFO L93 Difference]: Finished difference Result 145 states and 166 transitions. [2024-11-18 13:56:49,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-18 13:56:49,876 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 60 [2024-11-18 13:56:49,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 13:56:49,877 INFO L225 Difference]: With dead ends: 145 [2024-11-18 13:56:49,877 INFO L226 Difference]: Without dead ends: 117 [2024-11-18 13:56:49,877 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2024-11-18 13:56:49,878 INFO L432 NwaCegarLoop]: 41 mSDtfsCounter, 8 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 13:56:49,878 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 255 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 13:56:49,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2024-11-18 13:56:49,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2024-11-18 13:56:49,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 89 states have (on average 1.1685393258426966) internal successors, (104), 92 states have internal predecessors, (104), 18 states have call successors, (18), 9 states have call predecessors, (18), 9 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2024-11-18 13:56:49,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 138 transitions. [2024-11-18 13:56:49,893 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 138 transitions. Word has length 60 [2024-11-18 13:56:49,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 13:56:49,894 INFO L471 AbstractCegarLoop]: Abstraction has 117 states and 138 transitions. [2024-11-18 13:56:49,894 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-18 13:56:49,894 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 138 transitions. [2024-11-18 13:56:49,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-11-18 13:56:49,894 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 13:56:49,895 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 13:56:49,895 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-18 13:56:49,895 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 13:56:49,895 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 13:56:49,895 INFO L85 PathProgramCache]: Analyzing trace with hash 49043698, now seen corresponding path program 4 times [2024-11-18 13:56:49,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 13:56:49,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264822285] [2024-11-18 13:56:49,895 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-18 13:56:49,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 13:56:49,904 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-18 13:56:49,904 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 13:56:49,965 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 41 proven. 22 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-18 13:56:49,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 13:56:49,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264822285] [2024-11-18 13:56:49,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264822285] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 13:56:49,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314086674] [2024-11-18 13:56:49,966 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-18 13:56:49,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 13:56:49,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 13:56:49,968 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) [2024-11-18 13:56:49,970 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-18 13:56:50,058 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-18 13:56:50,059 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 13:56:50,060 INFO L255 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-18 13:56:50,061 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 13:56:50,086 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 41 proven. 22 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-18 13:56:50,086 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 13:56:50,154 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 41 proven. 22 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-18 13:56:50,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314086674] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 13:56:50,155 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 13:56:50,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 9 [2024-11-18 13:56:50,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401170353] [2024-11-18 13:56:50,155 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 13:56:50,156 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-18 13:56:50,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 13:56:50,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-18 13:56:50,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-11-18 13:56:50,156 INFO L87 Difference]: Start difference. First operand 117 states and 138 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 states have internal predecessors, (38), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-18 13:56:50,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 13:56:50,294 INFO L93 Difference]: Finished difference Result 215 states and 260 transitions. [2024-11-18 13:56:50,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-18 13:56:50,294 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 states have internal predecessors, (38), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 60 [2024-11-18 13:56:50,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 13:56:50,296 INFO L225 Difference]: With dead ends: 215 [2024-11-18 13:56:50,296 INFO L226 Difference]: Without dead ends: 138 [2024-11-18 13:56:50,296 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 113 SyntacticMatches, 7 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2024-11-18 13:56:50,297 INFO L432 NwaCegarLoop]: 47 mSDtfsCounter, 10 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 13:56:50,297 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 291 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 13:56:50,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2024-11-18 13:56:50,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 130. [2024-11-18 13:56:50,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 102 states have (on average 1.1862745098039216) internal successors, (121), 105 states have internal predecessors, (121), 18 states have call successors, (18), 9 states have call predecessors, (18), 9 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2024-11-18 13:56:50,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 155 transitions. [2024-11-18 13:56:50,317 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 155 transitions. Word has length 60 [2024-11-18 13:56:50,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 13:56:50,317 INFO L471 AbstractCegarLoop]: Abstraction has 130 states and 155 transitions. [2024-11-18 13:56:50,317 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 states have internal predecessors, (38), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-18 13:56:50,318 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 155 transitions. [2024-11-18 13:56:50,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-11-18 13:56:50,318 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 13:56:50,318 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 13:56:50,331 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-18 13:56:50,518 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,SelfDestructingSolverStorable16 [2024-11-18 13:56:50,519 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 13:56:50,519 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 13:56:50,519 INFO L85 PathProgramCache]: Analyzing trace with hash 795832544, now seen corresponding path program 5 times [2024-11-18 13:56:50,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 13:56:50,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822641050] [2024-11-18 13:56:50,519 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-18 13:56:50,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 13:56:50,540 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2024-11-18 13:56:50,540 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 13:56:55,270 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 51 proven. 40 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-18 13:56:55,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 13:56:55,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822641050] [2024-11-18 13:56:55,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822641050] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 13:56:55,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829843158] [2024-11-18 13:56:55,270 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-18 13:56:55,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 13:56:55,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 13:56:55,272 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) [2024-11-18 13:56:55,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-18 13:56:55,381 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2024-11-18 13:56:55,381 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 13:56:55,383 INFO L255 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 77 conjuncts are in the unsatisfiable core [2024-11-18 13:56:55,386 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 13:56:55,388 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 7 treesize of output 6 [2024-11-18 13:56:55,777 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 45 treesize of output 40 [2024-11-18 13:56:58,248 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 99 treesize of output 77 [2024-11-18 13:56:58,388 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 53 proven. 46 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-18 13:56:58,388 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 13:57:00,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829843158] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 13:57:00,864 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-18 13:57:00,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 50 [2024-11-18 13:57:00,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208051287] [2024-11-18 13:57:00,864 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-18 13:57:00,864 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-11-18 13:57:00,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 13:57:00,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-11-18 13:57:00,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=4734, Unknown=0, NotChecked=0, Total=5402 [2024-11-18 13:57:00,866 INFO L87 Difference]: Start difference. First operand 130 states and 155 transitions. Second operand has 50 states, 49 states have (on average 1.510204081632653) internal successors, (74), 49 states have internal predecessors, (74), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-18 13:57:16,471 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] [2024-11-18 13:57:16,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 13:57:16,553 INFO L93 Difference]: Finished difference Result 184 states and 216 transitions. [2024-11-18 13:57:16,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2024-11-18 13:57:16,554 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 1.510204081632653) internal successors, (74), 49 states have internal predecessors, (74), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 63 [2024-11-18 13:57:16,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 13:57:16,555 INFO L225 Difference]: With dead ends: 184 [2024-11-18 13:57:16,555 INFO L226 Difference]: Without dead ends: 96 [2024-11-18 13:57:16,557 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 54 SyntacticMatches, 5 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 3118 ImplicationChecksByTransitivity, 15.5s TimeCoverageRelationStatistics Valid=1674, Invalid=9882, Unknown=0, NotChecked=0, Total=11556 [2024-11-18 13:57:16,557 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 104 mSDsluCounter, 480 mSDsCounter, 0 mSdLazyCounter, 1360 mSolverCounterSat, 51 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 513 SdHoareTripleChecker+Invalid, 1412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1360 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2024-11-18 13:57:16,557 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 513 Invalid, 1412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1360 Invalid, 1 Unknown, 0 Unchecked, 6.9s Time] [2024-11-18 13:57:16,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2024-11-18 13:57:16,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 89. [2024-11-18 13:57:16,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 68 states have (on average 1.1029411764705883) internal successors, (75), 70 states have internal predecessors, (75), 13 states have call successors, (13), 7 states have call predecessors, (13), 7 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2024-11-18 13:57:16,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 100 transitions. [2024-11-18 13:57:16,577 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 100 transitions. Word has length 63 [2024-11-18 13:57:16,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 13:57:16,577 INFO L471 AbstractCegarLoop]: Abstraction has 89 states and 100 transitions. [2024-11-18 13:57:16,578 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 49 states have (on average 1.510204081632653) internal successors, (74), 49 states have internal predecessors, (74), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-18 13:57:16,578 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 100 transitions. [2024-11-18 13:57:16,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2024-11-18 13:57:16,578 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 13:57:16,579 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 13:57:16,593 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-18 13:57:16,779 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,SelfDestructingSolverStorable17 [2024-11-18 13:57:16,780 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 13:57:16,780 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 13:57:16,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1015297271, now seen corresponding path program 1 times [2024-11-18 13:57:16,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 13:57:16,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647191611] [2024-11-18 13:57:16,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 13:57:16,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 13:57:16,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 13:57:17,322 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-18 13:57:17,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 13:57:17,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647191611] [2024-11-18 13:57:17,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647191611] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 13:57:17,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391011475] [2024-11-18 13:57:17,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 13:57:17,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 13:57:17,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 13:57:17,324 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) [2024-11-18 13:57:17,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-18 13:57:17,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 13:57:17,439 INFO L255 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 96 conjuncts are in the unsatisfiable core [2024-11-18 13:57:17,443 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 13:57:17,446 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 7 treesize of output 6 [2024-11-18 13:57:17,616 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 45 treesize of output 40 [2024-11-18 13:57:18,508 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-18 13:57:18,521 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-18 13:57:19,539 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 84 treesize of output 66 [2024-11-18 13:57:19,632 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-18 13:57:19,633 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 13:57:19,767 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 84 treesize of output 80 [2024-11-18 13:57:19,769 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 138 treesize of output 130 [2024-11-18 13:57:23,437 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-11-18 13:57:23,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391011475] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 13:57:23,438 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 13:57:23,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 23, 18] total 45 [2024-11-18 13:57:23,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319764569] [2024-11-18 13:57:23,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 13:57:23,438 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-11-18 13:57:23,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 13:57:23,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-11-18 13:57:23,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=320, Invalid=1660, Unknown=0, NotChecked=0, Total=1980 [2024-11-18 13:57:23,439 INFO L87 Difference]: Start difference. First operand 89 states and 100 transitions. Second operand has 45 states, 44 states have (on average 2.0) internal successors, (88), 43 states have internal predecessors, (88), 7 states have call successors, (24), 5 states have call predecessors, (24), 3 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2024-11-18 13:57:27,644 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-18 13:57:32,660 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 5.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers []