./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/brs4.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 84cfde4a Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/brs4.c -s /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-clean/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 727a45fc5966747e99c4394c0114e789db4ba39dd55af3d2c235925ac8282f92 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-84cfde4 [2024-10-10 22:19:51,051 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-10 22:19:51,115 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-10 22:19:51,119 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-10 22:19:51,120 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-10 22:19:51,152 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-10 22:19:51,153 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-10 22:19:51,153 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-10 22:19:51,154 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-10 22:19:51,154 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-10 22:19:51,155 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-10 22:19:51,155 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-10 22:19:51,156 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-10 22:19:51,157 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-10 22:19:51,159 INFO L153 SettingsManager]: * Use SBE=true [2024-10-10 22:19:51,159 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-10 22:19:51,160 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-10 22:19:51,160 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-10 22:19:51,160 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-10 22:19:51,160 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-10 22:19:51,161 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-10 22:19:51,165 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-10 22:19:51,165 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-10 22:19:51,166 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-10 22:19:51,166 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-10 22:19:51,166 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-10 22:19:51,166 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-10 22:19:51,166 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-10 22:19:51,167 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-10 22:19:51,167 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-10 22:19:51,167 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-10 22:19:51,167 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-10 22:19:51,168 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-10 22:19:51,168 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-10 22:19:51,168 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-10 22:19:51,169 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-10 22:19:51,170 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-10 22:19:51,170 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-10 22:19:51,170 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-10 22:19:51,171 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-10 22:19:51,172 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-10 22:19:51,173 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-10 22:19:51,173 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-clean/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 727a45fc5966747e99c4394c0114e789db4ba39dd55af3d2c235925ac8282f92 [2024-10-10 22:19:51,419 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-10 22:19:51,443 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-10 22:19:51,446 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-10 22:19:51,448 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-10 22:19:51,448 INFO L274 PluginConnector]: CDTParser initialized [2024-10-10 22:19:51,449 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/brs4.c [2024-10-10 22:19:52,824 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-10 22:19:53,029 INFO L384 CDTParser]: Found 1 translation units. [2024-10-10 22:19:53,030 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/brs4.c [2024-10-10 22:19:53,037 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/07413bd15/dd09dc366fc74591aeedff0674bfeb5f/FLAG2ba759c45 [2024-10-10 22:19:53,414 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/07413bd15/dd09dc366fc74591aeedff0674bfeb5f [2024-10-10 22:19:53,416 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-10 22:19:53,417 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-10 22:19:53,420 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-10 22:19:53,420 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-10 22:19:53,425 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-10 22:19:53,425 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.10 10:19:53" (1/1) ... [2024-10-10 22:19:53,426 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51ee7df1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:19:53, skipping insertion in model container [2024-10-10 22:19:53,426 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.10 10:19:53" (1/1) ... [2024-10-10 22:19:53,443 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-10 22:19:53,603 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/brs4.c[587,600] [2024-10-10 22:19:53,628 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-10 22:19:53,636 INFO L200 MainTranslator]: Completed pre-run [2024-10-10 22:19:53,648 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/brs4.c[587,600] [2024-10-10 22:19:53,654 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-10 22:19:53,669 INFO L204 MainTranslator]: Completed translation [2024-10-10 22:19:53,669 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:19:53 WrapperNode [2024-10-10 22:19:53,670 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-10 22:19:53,671 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-10 22:19:53,671 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-10 22:19:53,671 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-10 22:19:53,677 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:19:53" (1/1) ... [2024-10-10 22:19:53,683 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:19:53" (1/1) ... [2024-10-10 22:19:53,701 INFO L138 Inliner]: procedures = 17, calls = 27, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 73 [2024-10-10 22:19:53,701 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-10 22:19:53,702 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-10 22:19:53,702 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-10 22:19:53,703 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-10 22:19:53,712 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:19:53" (1/1) ... [2024-10-10 22:19:53,713 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:19:53" (1/1) ... [2024-10-10 22:19:53,715 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:19:53" (1/1) ... [2024-10-10 22:19:53,730 INFO L175 MemorySlicer]: Split 16 memory accesses to 4 slices as follows [2, 7, 3, 4]. 44 percent of accesses are in the largest equivalence class. The 9 initializations are split as follows [2, 7, 0, 0]. The 4 writes are split as follows [0, 0, 2, 2]. [2024-10-10 22:19:53,731 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:19:53" (1/1) ... [2024-10-10 22:19:53,731 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:19:53" (1/1) ... [2024-10-10 22:19:53,743 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:19:53" (1/1) ... [2024-10-10 22:19:53,748 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:19:53" (1/1) ... [2024-10-10 22:19:53,750 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:19:53" (1/1) ... [2024-10-10 22:19:53,751 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:19:53" (1/1) ... [2024-10-10 22:19:53,752 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-10 22:19:53,754 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-10 22:19:53,755 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-10 22:19:53,755 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-10 22:19:53,756 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:19:53" (1/1) ... [2024-10-10 22:19:53,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-10 22:19:53,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:19:53,794 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-10 22:19:53,798 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-10 22:19:53,850 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-10 22:19:53,850 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-10 22:19:53,850 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-10 22:19:53,850 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-10 22:19:53,850 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-10-10 22:19:53,850 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-10 22:19:53,850 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-10 22:19:53,851 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-10 22:19:53,851 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-10 22:19:53,851 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-10-10 22:19:53,851 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-10 22:19:53,851 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-10 22:19:53,851 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-10 22:19:53,851 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-10 22:19:53,851 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-10 22:19:53,852 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-10 22:19:53,852 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-10-10 22:19:53,852 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-10 22:19:53,919 INFO L238 CfgBuilder]: Building ICFG [2024-10-10 22:19:53,921 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-10 22:19:54,118 INFO L? ?]: Removed 11 outVars from TransFormulas that were not future-live. [2024-10-10 22:19:54,119 INFO L287 CfgBuilder]: Performing block encoding [2024-10-10 22:19:54,139 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-10 22:19:54,140 INFO L314 CfgBuilder]: Removed 2 assume(true) statements. [2024-10-10 22:19:54,140 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.10 10:19:54 BoogieIcfgContainer [2024-10-10 22:19:54,140 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-10 22:19:54,143 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-10 22:19:54,143 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-10 22:19:54,146 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-10 22:19:54,147 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.10 10:19:53" (1/3) ... [2024-10-10 22:19:54,147 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b5f2e4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.10 10:19:54, skipping insertion in model container [2024-10-10 22:19:54,147 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:19:53" (2/3) ... [2024-10-10 22:19:54,148 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b5f2e4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.10 10:19:54, skipping insertion in model container [2024-10-10 22:19:54,148 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.10 10:19:54" (3/3) ... [2024-10-10 22:19:54,149 INFO L112 eAbstractionObserver]: Analyzing ICFG brs4.c [2024-10-10 22:19:54,162 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-10 22:19:54,163 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-10 22:19:54,229 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-10 22:19:54,239 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;@4e298558, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-10 22:19:54,239 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-10 22:19:54,245 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 16 states have (on average 1.625) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:19:54,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-10-10 22:19:54,251 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:19:54,252 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:19:54,252 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:19:54,258 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:19:54,259 INFO L85 PathProgramCache]: Analyzing trace with hash -1256235845, now seen corresponding path program 1 times [2024-10-10 22:19:54,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:19:54,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664175480] [2024-10-10 22:19:54,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:19:54,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:19:54,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:19:54,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:19:54,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:19:54,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664175480] [2024-10-10 22:19:54,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664175480] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-10 22:19:54,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-10 22:19:54,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-10 22:19:54,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140689731] [2024-10-10 22:19:54,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-10 22:19:54,461 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-10 22:19:54,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:19:54,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-10 22:19:54,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-10 22:19:54,483 INFO L87 Difference]: Start difference. First operand has 18 states, 16 states have (on average 1.625) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:19:54,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:19:54,499 INFO L93 Difference]: Finished difference Result 33 states and 47 transitions. [2024-10-10 22:19:54,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-10 22:19:54,503 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-10-10 22:19:54,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:19:54,509 INFO L225 Difference]: With dead ends: 33 [2024-10-10 22:19:54,509 INFO L226 Difference]: Without dead ends: 15 [2024-10-10 22:19:54,512 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-10 22:19:54,516 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-10 22:19:54,517 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-10 22:19:54,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2024-10-10 22:19:54,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2024-10-10 22:19:54,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:19:54,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2024-10-10 22:19:54,547 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 10 [2024-10-10 22:19:54,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:19:54,548 INFO L471 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2024-10-10 22:19:54,548 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:19:54,548 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2024-10-10 22:19:54,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-10-10 22:19:54,549 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:19:54,549 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:19:54,549 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-10 22:19:54,550 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:19:54,551 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:19:54,551 INFO L85 PathProgramCache]: Analyzing trace with hash -2065910172, now seen corresponding path program 1 times [2024-10-10 22:19:54,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:19:54,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118574567] [2024-10-10 22:19:54,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:19:54,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:19:54,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:19:54,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:19:54,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:19:54,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118574567] [2024-10-10 22:19:54,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118574567] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-10 22:19:54,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-10 22:19:54,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-10 22:19:54,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962514241] [2024-10-10 22:19:54,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-10 22:19:54,739 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-10 22:19:54,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:19:54,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-10 22:19:54,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-10 22:19:54,743 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:19:54,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:19:54,794 INFO L93 Difference]: Finished difference Result 32 states and 42 transitions. [2024-10-10 22:19:54,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-10 22:19:54,795 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-10-10 22:19:54,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:19:54,796 INFO L225 Difference]: With dead ends: 32 [2024-10-10 22:19:54,796 INFO L226 Difference]: Without dead ends: 21 [2024-10-10 22:19:54,797 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-10 22:19:54,798 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 18 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-10 22:19:54,799 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 10 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-10 22:19:54,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-10-10 22:19:54,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2024-10-10 22:19:54,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:19:54,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2024-10-10 22:19:54,805 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 10 [2024-10-10 22:19:54,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:19:54,806 INFO L471 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2024-10-10 22:19:54,806 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:19:54,806 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2024-10-10 22:19:54,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-10-10 22:19:54,807 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:19:54,807 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:19:54,807 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-10 22:19:54,807 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:19:54,808 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:19:54,808 INFO L85 PathProgramCache]: Analyzing trace with hash 785079709, now seen corresponding path program 1 times [2024-10-10 22:19:54,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:19:54,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401699756] [2024-10-10 22:19:54,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:19:54,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:19:54,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:19:55,107 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-10 22:19:55,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:19:55,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401699756] [2024-10-10 22:19:55,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401699756] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-10 22:19:55,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-10 22:19:55,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-10 22:19:55,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347910253] [2024-10-10 22:19:55,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-10 22:19:55,111 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-10 22:19:55,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:19:55,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-10 22:19:55,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-10 22:19:55,113 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:19:55,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:19:55,169 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2024-10-10 22:19:55,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-10 22:19:55,170 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2024-10-10 22:19:55,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:19:55,171 INFO L225 Difference]: With dead ends: 26 [2024-10-10 22:19:55,171 INFO L226 Difference]: Without dead ends: 22 [2024-10-10 22:19:55,171 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-10-10 22:19:55,172 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 10 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-10 22:19:55,173 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 27 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-10 22:19:55,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2024-10-10 22:19:55,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2024-10-10 22:19:55,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:19:55,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2024-10-10 22:19:55,177 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 16 [2024-10-10 22:19:55,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:19:55,178 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2024-10-10 22:19:55,178 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:19:55,178 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2024-10-10 22:19:55,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-10-10 22:19:55,179 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:19:55,179 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:19:55,179 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-10 22:19:55,179 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:19:55,180 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:19:55,180 INFO L85 PathProgramCache]: Analyzing trace with hash -485999892, now seen corresponding path program 1 times [2024-10-10 22:19:55,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:19:55,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997383267] [2024-10-10 22:19:55,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:19:55,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:19:55,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:19:55,300 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:19:55,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:19:55,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997383267] [2024-10-10 22:19:55,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997383267] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:19:55,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052182101] [2024-10-10 22:19:55,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:19:55,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:19:55,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:19:55,305 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:19:55,306 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-10 22:19:55,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:19:55,378 INFO L255 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-10 22:19:55,382 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:19:55,476 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:19:55,476 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:19:55,527 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:19:55,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052182101] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:19:55,529 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:19:55,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2024-10-10 22:19:55,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464838796] [2024-10-10 22:19:55,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:19:55,530 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-10 22:19:55,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:19:55,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-10 22:19:55,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-10-10 22:19:55,534 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:19:55,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:19:55,646 INFO L93 Difference]: Finished difference Result 42 states and 49 transitions. [2024-10-10 22:19:55,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-10 22:19:55,646 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2024-10-10 22:19:55,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:19:55,647 INFO L225 Difference]: With dead ends: 42 [2024-10-10 22:19:55,648 INFO L226 Difference]: Without dead ends: 28 [2024-10-10 22:19:55,648 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2024-10-10 22:19:55,650 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 12 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-10 22:19:55,651 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 26 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-10 22:19:55,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-10-10 22:19:55,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 24. [2024-10-10 22:19:55,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:19:55,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2024-10-10 22:19:55,660 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 19 [2024-10-10 22:19:55,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:19:55,661 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2024-10-10 22:19:55,661 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:19:55,661 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2024-10-10 22:19:55,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-10-10 22:19:55,661 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:19:55,661 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:19:55,682 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-10 22:19:55,865 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:19:55,866 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:19:55,867 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:19:55,867 INFO L85 PathProgramCache]: Analyzing trace with hash -105964608, now seen corresponding path program 1 times [2024-10-10 22:19:55,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:19:55,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192776802] [2024-10-10 22:19:55,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:19:55,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:19:55,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:19:56,525 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:19:56,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:19:56,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192776802] [2024-10-10 22:19:56,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192776802] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:19:56,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187161341] [2024-10-10 22:19:56,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:19:56,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:19:56,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:19:56,531 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:19:56,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-10 22:19:56,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:19:56,603 INFO L255 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-10-10 22:19:56,606 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:19:56,677 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-10 22:19:56,760 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-10 22:19:56,870 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-10 22:19:56,877 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 23 treesize of output 3 [2024-10-10 22:19:56,933 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-10-10 22:19:56,969 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:19:56,969 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:19:57,104 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 20 treesize of output 18 [2024-10-10 22:19:57,109 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 [2024-10-10 22:19:57,177 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:19:57,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187161341] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:19:57,177 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:19:57,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 25 [2024-10-10 22:19:57,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923859726] [2024-10-10 22:19:57,178 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:19:57,178 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-10-10 22:19:57,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:19:57,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-10-10 22:19:57,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=481, Unknown=0, NotChecked=0, Total=600 [2024-10-10 22:19:57,180 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 25 states, 25 states have (on average 2.0) internal successors, (50), 25 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:19:57,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:19:57,378 INFO L93 Difference]: Finished difference Result 49 states and 60 transitions. [2024-10-10 22:19:57,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-10 22:19:57,379 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 25 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2024-10-10 22:19:57,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:19:57,380 INFO L225 Difference]: With dead ends: 49 [2024-10-10 22:19:57,380 INFO L226 Difference]: Without dead ends: 29 [2024-10-10 22:19:57,382 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=135, Invalid=567, Unknown=0, NotChecked=0, Total=702 [2024-10-10 22:19:57,384 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 18 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-10 22:19:57,384 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 47 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-10 22:19:57,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-10-10 22:19:57,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2024-10-10 22:19:57,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 26 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:19:57,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2024-10-10 22:19:57,391 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 22 [2024-10-10 22:19:57,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:19:57,391 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2024-10-10 22:19:57,391 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 25 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:19:57,391 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2024-10-10 22:19:57,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-10-10 22:19:57,392 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:19:57,392 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:19:57,410 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-10 22:19:57,596 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:19:57,597 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:19:57,597 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:19:57,597 INFO L85 PathProgramCache]: Analyzing trace with hash 1605608937, now seen corresponding path program 2 times [2024-10-10 22:19:57,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:19:57,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362766545] [2024-10-10 22:19:57,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:19:57,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:19:57,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:19:57,728 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:19:57,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:19:57,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362766545] [2024-10-10 22:19:57,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362766545] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:19:57,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907660386] [2024-10-10 22:19:57,730 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-10 22:19:57,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:19:57,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:19:57,732 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:19:57,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-10 22:19:57,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-10 22:19:57,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 22:19:57,803 INFO L255 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-10 22:19:57,804 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:19:57,881 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:19:57,881 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:19:57,940 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:19:57,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907660386] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:19:57,940 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:19:57,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2024-10-10 22:19:57,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777366885] [2024-10-10 22:19:57,941 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:19:57,941 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-10 22:19:57,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:19:57,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-10 22:19:57,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2024-10-10 22:19:57,943 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:19:58,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:19:58,044 INFO L93 Difference]: Finished difference Result 56 states and 65 transitions. [2024-10-10 22:19:58,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-10 22:19:58,045 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2024-10-10 22:19:58,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:19:58,046 INFO L225 Difference]: With dead ends: 56 [2024-10-10 22:19:58,046 INFO L226 Difference]: Without dead ends: 36 [2024-10-10 22:19:58,046 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2024-10-10 22:19:58,047 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 12 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-10 22:19:58,047 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 33 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-10 22:19:58,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-10-10 22:19:58,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2024-10-10 22:19:58,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.1875) internal successors, (38), 32 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:19:58,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2024-10-10 22:19:58,054 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 25 [2024-10-10 22:19:58,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:19:58,055 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2024-10-10 22:19:58,055 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:19:58,055 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2024-10-10 22:19:58,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-10-10 22:19:58,056 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:19:58,056 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:19:58,074 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-10-10 22:19:58,257 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:19:58,257 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:19:58,258 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:19:58,258 INFO L85 PathProgramCache]: Analyzing trace with hash -1537501251, now seen corresponding path program 3 times [2024-10-10 22:19:58,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:19:58,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915943947] [2024-10-10 22:19:58,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:19:58,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:19:58,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:19:59,257 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:19:59,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:19:59,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915943947] [2024-10-10 22:19:59,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915943947] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:19:59,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889764442] [2024-10-10 22:19:59,258 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-10 22:19:59,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:19:59,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:19:59,260 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:19:59,261 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-10 22:19:59,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-10-10 22:19:59,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 22:19:59,331 INFO L255 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-10-10 22:19:59,334 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:19:59,478 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-10 22:19:59,570 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-10-10 22:19:59,787 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-10 22:19:59,934 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 23 treesize of output 3 [2024-10-10 22:20:00,138 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-10 22:20:00,145 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:20:00,146 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 30 [2024-10-10 22:20:00,151 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 34 treesize of output 11 [2024-10-10 22:20:00,205 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-10-10 22:20:00,232 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:20:00,232 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:20:01,111 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 45 treesize of output 41 [2024-10-10 22:20:01,131 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-10-10 22:20:01,133 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 358 treesize of output 302 [2024-10-10 22:20:01,296 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:20:01,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889764442] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:20:01,297 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:20:01,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 17] total 50 [2024-10-10 22:20:01,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763675452] [2024-10-10 22:20:01,297 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:20:01,298 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-10-10 22:20:01,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:20:01,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-10-10 22:20:01,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=346, Invalid=2104, Unknown=0, NotChecked=0, Total=2450 [2024-10-10 22:20:01,302 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand has 50 states, 50 states have (on average 1.54) internal successors, (77), 50 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:20:04,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:20:04,908 INFO L93 Difference]: Finished difference Result 114 states and 143 transitions. [2024-10-10 22:20:04,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2024-10-10 22:20:04,909 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.54) internal successors, (77), 50 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2024-10-10 22:20:04,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:20:04,911 INFO L225 Difference]: With dead ends: 114 [2024-10-10 22:20:04,911 INFO L226 Difference]: Without dead ends: 74 [2024-10-10 22:20:04,914 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2668 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=1475, Invalid=7454, Unknown=1, NotChecked=0, Total=8930 [2024-10-10 22:20:04,916 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 289 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 838 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 1015 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 838 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-10-10 22:20:04,916 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [289 Valid, 60 Invalid, 1015 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 838 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-10-10 22:20:04,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2024-10-10 22:20:04,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 58. [2024-10-10 22:20:04,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.1929824561403508) internal successors, (68), 57 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:20:04,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 68 transitions. [2024-10-10 22:20:04,931 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 68 transitions. Word has length 28 [2024-10-10 22:20:04,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:20:04,932 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 68 transitions. [2024-10-10 22:20:04,932 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.54) internal successors, (77), 50 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:20:04,932 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 68 transitions. [2024-10-10 22:20:04,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-10-10 22:20:04,933 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:20:04,933 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:20:04,953 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-10 22:20:05,133 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-10-10 22:20:05,134 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:20:05,134 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:20:05,134 INFO L85 PathProgramCache]: Analyzing trace with hash -1590483447, now seen corresponding path program 4 times [2024-10-10 22:20:05,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:20:05,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105720206] [2024-10-10 22:20:05,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:20:05,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:20:05,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:20:05,314 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 25 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:20:05,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:20:05,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105720206] [2024-10-10 22:20:05,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105720206] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:20:05,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78119771] [2024-10-10 22:20:05,315 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-10 22:20:05,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:20:05,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:20:05,317 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:20:05,318 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-10 22:20:05,382 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-10 22:20:05,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 22:20:05,384 WARN L253 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-10-10 22:20:05,388 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:20:05,394 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 23 treesize of output 1 [2024-10-10 22:20:05,433 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 16 [2024-10-10 22:20:05,474 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 31 [2024-10-10 22:20:05,561 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 46 [2024-10-10 22:20:05,764 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-10 22:20:05,872 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 23 treesize of output 3 [2024-10-10 22:20:05,978 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 53 treesize of output 30 [2024-10-10 22:20:06,098 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 64 treesize of output 41 [2024-10-10 22:20:06,404 INFO L349 Elim1Store]: treesize reduction 54, result has 65.2 percent of original size [2024-10-10 22:20:06,404 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 107 treesize of output 136 [2024-10-10 22:20:06,414 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 39 treesize of output 16 [2024-10-10 22:20:06,861 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-10-10 22:20:06,897 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 27 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:20:06,898 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:20:07,991 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 7 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:20:07,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78119771] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:20:07,992 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:20:07,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 26, 26] total 60 [2024-10-10 22:20:07,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321361103] [2024-10-10 22:20:07,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:20:07,992 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2024-10-10 22:20:07,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:20:07,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2024-10-10 22:20:07,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=401, Invalid=3139, Unknown=0, NotChecked=0, Total=3540 [2024-10-10 22:20:07,995 INFO L87 Difference]: Start difference. First operand 58 states and 68 transitions. Second operand has 60 states, 60 states have (on average 1.6666666666666667) internal successors, (100), 60 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:20:16,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:20:16,038 INFO L93 Difference]: Finished difference Result 271 states and 332 transitions. [2024-10-10 22:20:16,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2024-10-10 22:20:16,039 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.6666666666666667) internal successors, (100), 60 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2024-10-10 22:20:16,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:20:16,040 INFO L225 Difference]: With dead ends: 271 [2024-10-10 22:20:16,040 INFO L226 Difference]: Without dead ends: 188 [2024-10-10 22:20:16,047 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10757 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=4172, Invalid=28770, Unknown=0, NotChecked=0, Total=32942 [2024-10-10 22:20:16,048 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 270 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 1834 mSolverCounterSat, 270 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 2104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 270 IncrementalHoareTripleChecker+Valid, 1834 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-10-10 22:20:16,048 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [270 Valid, 148 Invalid, 2104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [270 Valid, 1834 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-10-10 22:20:16,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2024-10-10 22:20:16,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 149. [2024-10-10 22:20:16,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 1.2364864864864864) internal successors, (183), 148 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:20:16,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 183 transitions. [2024-10-10 22:20:16,082 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 183 transitions. Word has length 37 [2024-10-10 22:20:16,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:20:16,084 INFO L471 AbstractCegarLoop]: Abstraction has 149 states and 183 transitions. [2024-10-10 22:20:16,084 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 1.6666666666666667) internal successors, (100), 60 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:20:16,084 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 183 transitions. [2024-10-10 22:20:16,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-10-10 22:20:16,086 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:20:16,086 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:20:16,100 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-10-10 22:20:16,286 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:20:16,287 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:20:16,287 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:20:16,287 INFO L85 PathProgramCache]: Analyzing trace with hash -916037408, now seen corresponding path program 5 times [2024-10-10 22:20:16,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:20:16,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262211010] [2024-10-10 22:20:16,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:20:16,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:20:16,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:20:16,500 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 22 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:20:16,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:20:16,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262211010] [2024-10-10 22:20:16,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262211010] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:20:16,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888567622] [2024-10-10 22:20:16,501 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-10 22:20:16,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:20:16,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:20:16,502 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:20:16,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-10 22:20:16,579 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-10-10 22:20:16,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 22:20:16,580 INFO L255 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-10 22:20:16,581 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:20:16,609 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-10-10 22:20:16,609 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-10 22:20:16,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888567622] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-10 22:20:16,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-10 22:20:16,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [14] total 16 [2024-10-10 22:20:16,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849847321] [2024-10-10 22:20:16,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-10 22:20:16,610 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-10 22:20:16,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:20:16,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-10 22:20:16,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2024-10-10 22:20:16,611 INFO L87 Difference]: Start difference. First operand 149 states and 183 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:20:16,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:20:16,655 INFO L93 Difference]: Finished difference Result 253 states and 311 transitions. [2024-10-10 22:20:16,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-10 22:20:16,655 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2024-10-10 22:20:16,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:20:16,656 INFO L225 Difference]: With dead ends: 253 [2024-10-10 22:20:16,656 INFO L226 Difference]: Without dead ends: 144 [2024-10-10 22:20:16,657 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2024-10-10 22:20:16,657 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 6 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-10 22:20:16,658 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 18 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-10 22:20:16,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2024-10-10 22:20:16,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2024-10-10 22:20:16,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 1.2027972027972027) internal successors, (172), 143 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:20:16,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 172 transitions. [2024-10-10 22:20:16,689 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 172 transitions. Word has length 40 [2024-10-10 22:20:16,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:20:16,689 INFO L471 AbstractCegarLoop]: Abstraction has 144 states and 172 transitions. [2024-10-10 22:20:16,689 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:20:16,689 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 172 transitions. [2024-10-10 22:20:16,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-10-10 22:20:16,690 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:20:16,690 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:20:16,704 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-10-10 22:20:16,891 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-10-10 22:20:16,891 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:20:16,891 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:20:16,891 INFO L85 PathProgramCache]: Analyzing trace with hash -1733685858, now seen corresponding path program 6 times [2024-10-10 22:20:16,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:20:16,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271577598] [2024-10-10 22:20:16,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:20:16,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:20:16,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:20:17,099 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 22 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:20:17,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:20:17,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271577598] [2024-10-10 22:20:17,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271577598] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:20:17,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534800965] [2024-10-10 22:20:17,099 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-10 22:20:17,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:20:17,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:20:17,102 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:20:17,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-10 22:20:17,200 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-10-10 22:20:17,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 22:20:17,203 INFO L255 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-10-10 22:20:17,204 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:20:17,334 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 35 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:20:17,334 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:20:17,439 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 35 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:20:17,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534800965] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:20:17,440 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:20:17,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 23 [2024-10-10 22:20:17,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341276972] [2024-10-10 22:20:17,441 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:20:17,441 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-10-10 22:20:17,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:20:17,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-10-10 22:20:17,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2024-10-10 22:20:17,442 INFO L87 Difference]: Start difference. First operand 144 states and 172 transitions. Second operand has 23 states, 23 states have (on average 3.217391304347826) internal successors, (74), 23 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:20:17,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:20:17,749 INFO L93 Difference]: Finished difference Result 216 states and 260 transitions. [2024-10-10 22:20:17,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-10-10 22:20:17,750 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.217391304347826) internal successors, (74), 23 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2024-10-10 22:20:17,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:20:17,751 INFO L225 Difference]: With dead ends: 216 [2024-10-10 22:20:17,751 INFO L226 Difference]: Without dead ends: 136 [2024-10-10 22:20:17,752 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 62 SyntacticMatches, 9 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=338, Invalid=1144, Unknown=0, NotChecked=0, Total=1482 [2024-10-10 22:20:17,752 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 59 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 393 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-10 22:20:17,752 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 28 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 393 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-10 22:20:17,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2024-10-10 22:20:17,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 48. [2024-10-10 22:20:17,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.127659574468085) internal successors, (53), 47 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:20:17,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2024-10-10 22:20:17,767 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 40 [2024-10-10 22:20:17,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:20:17,769 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2024-10-10 22:20:17,769 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.217391304347826) internal successors, (74), 23 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:20:17,769 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2024-10-10 22:20:17,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-10-10 22:20:17,770 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:20:17,770 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:20:17,787 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-10-10 22:20:17,970 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:20:17,971 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:20:17,971 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:20:17,972 INFO L85 PathProgramCache]: Analyzing trace with hash 1909297262, now seen corresponding path program 7 times [2024-10-10 22:20:17,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:20:17,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877359275] [2024-10-10 22:20:17,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:20:17,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:20:17,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:20:18,176 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 38 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:20:18,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:20:18,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877359275] [2024-10-10 22:20:18,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877359275] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:20:18,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331342614] [2024-10-10 22:20:18,177 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-10 22:20:18,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:20:18,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:20:18,179 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:20:18,181 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-10 22:20:18,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:20:18,264 INFO L255 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-10 22:20:18,266 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:20:18,389 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 51 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:20:18,389 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:20:18,477 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 51 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:20:18,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331342614] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:20:18,478 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:20:18,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2024-10-10 22:20:18,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073511256] [2024-10-10 22:20:18,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:20:18,478 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-10-10 22:20:18,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:20:18,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-10-10 22:20:18,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2024-10-10 22:20:18,479 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand has 23 states, 23 states have (on average 2.9565217391304346) internal successors, (68), 23 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:20:18,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:20:18,613 INFO L93 Difference]: Finished difference Result 99 states and 114 transitions. [2024-10-10 22:20:18,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-10 22:20:18,614 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.9565217391304346) internal successors, (68), 23 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2024-10-10 22:20:18,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:20:18,615 INFO L225 Difference]: With dead ends: 99 [2024-10-10 22:20:18,615 INFO L226 Difference]: Without dead ends: 75 [2024-10-10 22:20:18,615 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 67 SyntacticMatches, 11 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=201, Invalid=555, Unknown=0, NotChecked=0, Total=756 [2024-10-10 22:20:18,615 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 47 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-10 22:20:18,616 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 32 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-10 22:20:18,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2024-10-10 22:20:18,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 56. [2024-10-10 22:20:18,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.1272727272727272) internal successors, (62), 55 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:20:18,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 62 transitions. [2024-10-10 22:20:18,629 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 62 transitions. Word has length 43 [2024-10-10 22:20:18,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:20:18,629 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 62 transitions. [2024-10-10 22:20:18,629 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.9565217391304346) internal successors, (68), 23 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:20:18,629 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 62 transitions. [2024-10-10 22:20:18,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-10-10 22:20:18,630 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:20:18,630 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:20:18,643 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-10-10 22:20:18,831 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-10-10 22:20:18,831 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:20:18,832 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:20:18,832 INFO L85 PathProgramCache]: Analyzing trace with hash -488172930, now seen corresponding path program 8 times [2024-10-10 22:20:18,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:20:18,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222062127] [2024-10-10 22:20:18,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:20:18,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:20:18,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:20:21,398 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:20:21,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:20:21,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222062127] [2024-10-10 22:20:21,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222062127] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:20:21,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300627607] [2024-10-10 22:20:21,399 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-10 22:20:21,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:20:21,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:20:21,400 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:20:21,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-10 22:20:21,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-10 22:20:21,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 22:20:21,491 INFO L255 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 67 conjuncts are in the unsatisfiable core [2024-10-10 22:20:21,500 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:20:21,593 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-10 22:20:21,659 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-10-10 22:20:21,736 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2024-10-10 22:20:21,854 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2024-10-10 22:20:21,985 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 41 [2024-10-10 22:20:22,110 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-10 22:20:22,256 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 23 treesize of output 3 [2024-10-10 22:20:22,411 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 44 treesize of output 21 [2024-10-10 22:20:22,563 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 50 treesize of output 27 [2024-10-10 22:20:22,706 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 55 treesize of output 32 [2024-10-10 22:20:22,850 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 60 treesize of output 37 [2024-10-10 22:20:22,858 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:20:22,859 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 68 treesize of output 28 [2024-10-10 22:20:22,916 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-10-10 22:20:22,947 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:20:22,948 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:20:24,565 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 237 treesize of output 227 [2024-10-10 22:20:29,591 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:20:29,727 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 30356477466116414 treesize of output 29652790024339774 [2024-10-10 22:20:55,119 WARN L286 SmtUtils]: Spent 24.95s on a formula simplification. DAG size of input: 106233 DAG size of output: 92 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-10-10 22:20:56,261 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:20:56,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300627607] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:20:56,261 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:20:56,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 76 [2024-10-10 22:20:56,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529112172] [2024-10-10 22:20:56,262 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:20:56,262 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2024-10-10 22:20:56,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:20:56,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2024-10-10 22:20:56,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=504, Invalid=5196, Unknown=0, NotChecked=0, Total=5700 [2024-10-10 22:20:56,265 INFO L87 Difference]: Start difference. First operand 56 states and 62 transitions. Second operand has 76 states, 76 states have (on average 1.7236842105263157) internal successors, (131), 76 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:21:12,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:21:12,349 INFO L93 Difference]: Finished difference Result 102 states and 114 transitions. [2024-10-10 22:21:12,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-10-10 22:21:12,349 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 1.7236842105263157) internal successors, (131), 76 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2024-10-10 22:21:12,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:21:12,350 INFO L225 Difference]: With dead ends: 102 [2024-10-10 22:21:12,350 INFO L226 Difference]: Without dead ends: 56 [2024-10-10 22:21:12,352 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3149 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=1054, Invalid=9452, Unknown=0, NotChecked=0, Total=10506 [2024-10-10 22:21:12,352 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 214 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 1521 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 1592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2024-10-10 22:21:12,353 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [214 Valid, 124 Invalid, 1592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1521 Invalid, 0 Unknown, 0 Unchecked, 7.3s Time] [2024-10-10 22:21:12,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-10-10 22:21:12,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 53. [2024-10-10 22:21:12,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.0769230769230769) internal successors, (56), 52 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:21:12,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 56 transitions. [2024-10-10 22:21:12,369 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 56 transitions. Word has length 46 [2024-10-10 22:21:12,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:21:12,370 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 56 transitions. [2024-10-10 22:21:12,370 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 1.7236842105263157) internal successors, (131), 76 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:21:12,370 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 56 transitions. [2024-10-10 22:21:12,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-10-10 22:21:12,370 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:21:12,370 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:21:12,389 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-10-10 22:21:12,574 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:21:12,575 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:21:12,575 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:21:12,575 INFO L85 PathProgramCache]: Analyzing trace with hash 1195789931, now seen corresponding path program 9 times [2024-10-10 22:21:12,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:21:12,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197376059] [2024-10-10 22:21:12,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:21:12,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:21:12,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:21:13,948 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 54 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:21:13,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:21:13,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197376059] [2024-10-10 22:21:13,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197376059] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:21:13,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806209913] [2024-10-10 22:21:13,949 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-10 22:21:13,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:21:13,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:21:13,951 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:21:13,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-10 22:21:14,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2024-10-10 22:21:14,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 22:21:14,086 INFO L255 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-10-10 22:21:14,087 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:21:15,570 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 70 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:21:15,570 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:21:16,719 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 70 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:21:16,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806209913] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:21:16,719 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:21:16,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2024-10-10 22:21:16,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949599399] [2024-10-10 22:21:16,719 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:21:16,720 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-10-10 22:21:16,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:21:16,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-10-10 22:21:16,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=485, Unknown=0, NotChecked=0, Total=650 [2024-10-10 22:21:16,721 INFO L87 Difference]: Start difference. First operand 53 states and 56 transitions. Second operand has 26 states, 26 states have (on average 2.9615384615384617) internal successors, (77), 26 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:21:18,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:21:18,117 INFO L93 Difference]: Finished difference Result 89 states and 95 transitions. [2024-10-10 22:21:18,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-10-10 22:21:18,118 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.9615384615384617) internal successors, (77), 26 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2024-10-10 22:21:18,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:21:18,119 INFO L225 Difference]: With dead ends: 89 [2024-10-10 22:21:18,119 INFO L226 Difference]: Without dead ends: 62 [2024-10-10 22:21:18,119 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 76 SyntacticMatches, 13 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=258, Invalid=734, Unknown=0, NotChecked=0, Total=992 [2024-10-10 22:21:18,119 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 58 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-10-10 22:21:18,120 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 28 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-10-10 22:21:18,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2024-10-10 22:21:18,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 57. [2024-10-10 22:21:18,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.0892857142857142) internal successors, (61), 56 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:21:18,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2024-10-10 22:21:18,140 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 49 [2024-10-10 22:21:18,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:21:18,141 INFO L471 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2024-10-10 22:21:18,142 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.9615384615384617) internal successors, (77), 26 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:21:18,142 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2024-10-10 22:21:18,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-10-10 22:21:18,142 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:21:18,142 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 6, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:21:18,164 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-10-10 22:21:18,343 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-10-10 22:21:18,343 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:21:18,343 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:21:18,343 INFO L85 PathProgramCache]: Analyzing trace with hash -98958213, now seen corresponding path program 10 times [2024-10-10 22:21:18,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:21:18,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404637049] [2024-10-10 22:21:18,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:21:18,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:21:18,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat