./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/reducercommutativity/sep20-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3289d67d Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/reducercommutativity/sep20-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0b75ecb951567bcc8ce71aeb3e25d04f795cdcdda48b1113da4558d335596a9c --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-3289d67-m [2024-11-16 02:30:49,728 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-16 02:30:49,801 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-16 02:30:49,809 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-16 02:30:49,809 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-16 02:30:49,842 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-16 02:30:49,843 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-16 02:30:49,843 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-16 02:30:49,844 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-16 02:30:49,845 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-16 02:30:49,846 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-16 02:30:49,846 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-16 02:30:49,847 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-16 02:30:49,848 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-16 02:30:49,848 INFO L153 SettingsManager]: * Use SBE=true [2024-11-16 02:30:49,849 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-16 02:30:49,849 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-16 02:30:49,849 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-16 02:30:49,850 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-16 02:30:49,850 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-16 02:30:49,850 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-16 02:30:49,851 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-16 02:30:49,851 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-16 02:30:49,852 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-16 02:30:49,852 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-16 02:30:49,852 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-16 02:30:49,852 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-16 02:30:49,853 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-16 02:30:49,853 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-16 02:30:49,853 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-16 02:30:49,853 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-16 02:30:49,854 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-16 02:30:49,854 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-16 02:30:49,855 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-16 02:30:49,855 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-16 02:30:49,855 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-16 02:30:49,856 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-16 02:30:49,856 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-16 02:30:49,856 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-16 02:30:49,856 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-16 02:30:49,857 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-16 02:30:49,857 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-16 02:30:49,857 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0b75ecb951567bcc8ce71aeb3e25d04f795cdcdda48b1113da4558d335596a9c [2024-11-16 02:30:50,117 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-16 02:30:50,144 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-16 02:30:50,146 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-16 02:30:50,147 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-16 02:30:50,148 INFO L274 PluginConnector]: CDTParser initialized [2024-11-16 02:30:50,149 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/reducercommutativity/sep20-1.i [2024-11-16 02:30:51,587 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-16 02:30:51,763 INFO L384 CDTParser]: Found 1 translation units. [2024-11-16 02:30:51,764 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/sep20-1.i [2024-11-16 02:30:51,771 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af0fb0fde/fc8c5494827b404d84ed3262386bcb71/FLAGd8940d06b [2024-11-16 02:30:51,783 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af0fb0fde/fc8c5494827b404d84ed3262386bcb71 [2024-11-16 02:30:51,786 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-16 02:30:51,787 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-16 02:30:51,788 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-16 02:30:51,788 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-16 02:30:51,793 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-16 02:30:51,793 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 02:30:51" (1/1) ... [2024-11-16 02:30:51,794 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6fd54229 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:30:51, skipping insertion in model container [2024-11-16 02:30:51,794 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 02:30:51" (1/1) ... [2024-11-16 02:30:51,817 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-16 02:30:52,045 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/sep20-1.i[1293,1306] [2024-11-16 02:30:52,051 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-16 02:30:52,060 INFO L200 MainTranslator]: Completed pre-run [2024-11-16 02:30:52,088 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/sep20-1.i[1293,1306] [2024-11-16 02:30:52,090 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-16 02:30:52,110 INFO L204 MainTranslator]: Completed translation [2024-11-16 02:30:52,111 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:30:52 WrapperNode [2024-11-16 02:30:52,111 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-16 02:30:52,112 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-16 02:30:52,112 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-16 02:30:52,112 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-16 02:30:52,119 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:30:52" (1/1) ... [2024-11-16 02:30:52,126 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:30:52" (1/1) ... [2024-11-16 02:30:52,144 INFO L138 Inliner]: procedures = 16, calls = 22, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 67 [2024-11-16 02:30:52,146 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-16 02:30:52,147 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-16 02:30:52,147 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-16 02:30:52,147 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-16 02:30:52,185 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:30:52" (1/1) ... [2024-11-16 02:30:52,185 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:30:52" (1/1) ... [2024-11-16 02:30:52,188 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:30:52" (1/1) ... [2024-11-16 02:30:52,200 INFO L175 MemorySlicer]: Split 12 memory accesses to 2 slices as follows [2, 10]. 83 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 5 writes are split as follows [0, 5]. [2024-11-16 02:30:52,201 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:30:52" (1/1) ... [2024-11-16 02:30:52,201 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:30:52" (1/1) ... [2024-11-16 02:30:52,206 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:30:52" (1/1) ... [2024-11-16 02:30:52,206 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:30:52" (1/1) ... [2024-11-16 02:30:52,207 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:30:52" (1/1) ... [2024-11-16 02:30:52,208 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:30:52" (1/1) ... [2024-11-16 02:30:52,210 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-16 02:30:52,212 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-16 02:30:52,212 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-16 02:30:52,212 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-16 02:30:52,213 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:30:52" (1/1) ... [2024-11-16 02:30:52,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-16 02:30:52,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:30:52,263 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-16 02:30:52,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-16 02:30:52,316 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-16 02:30:52,317 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-16 02:30:52,317 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-16 02:30:52,317 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-16 02:30:52,317 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-16 02:30:52,317 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-16 02:30:52,318 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-16 02:30:52,318 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-16 02:30:52,318 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-16 02:30:52,320 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-16 02:30:52,320 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-16 02:30:52,320 INFO L130 BoogieDeclarations]: Found specification of procedure sep [2024-11-16 02:30:52,320 INFO L138 BoogieDeclarations]: Found implementation of procedure sep [2024-11-16 02:30:52,388 INFO L256 CfgBuilder]: Building ICFG [2024-11-16 02:30:52,390 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-16 02:30:52,548 INFO L1250 $ProcedureCfgBuilder]: dead code at ProgramPoint L31: call ULTIMATE.dealloc(main_~#x~0#1.base, main_~#x~0#1.offset);havoc main_~#x~0#1.base, main_~#x~0#1.offset; [2024-11-16 02:30:52,598 INFO L? ?]: Removed 16 outVars from TransFormulas that were not future-live. [2024-11-16 02:30:52,599 INFO L307 CfgBuilder]: Performing block encoding [2024-11-16 02:30:52,619 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-16 02:30:52,620 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-16 02:30:52,621 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.11 02:30:52 BoogieIcfgContainer [2024-11-16 02:30:52,621 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-16 02:30:52,624 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-16 02:30:52,624 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-16 02:30:52,628 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-16 02:30:52,629 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 02:30:51" (1/3) ... [2024-11-16 02:30:52,629 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59fb6d49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 02:30:52, skipping insertion in model container [2024-11-16 02:30:52,630 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:30:52" (2/3) ... [2024-11-16 02:30:52,630 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59fb6d49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 02:30:52, skipping insertion in model container [2024-11-16 02:30:52,631 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.11 02:30:52" (3/3) ... [2024-11-16 02:30:52,633 INFO L112 eAbstractionObserver]: Analyzing ICFG sep20-1.i [2024-11-16 02:30:52,652 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-16 02:30:52,653 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-16 02:30:52,720 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-16 02:30:52,729 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;@437e15b0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-16 02:30:52,729 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-16 02:30:52,733 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 23 states have (on average 1.391304347826087) internal successors, (32), 24 states have internal predecessors, (32), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-16 02:30:52,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-16 02:30:52,742 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:30:52,743 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:30:52,744 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:30:52,750 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:30:52,751 INFO L85 PathProgramCache]: Analyzing trace with hash 1661481438, now seen corresponding path program 1 times [2024-11-16 02:30:52,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:30:52,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837256597] [2024-11-16 02:30:52,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:30:52,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:30:52,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:30:52,970 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-11-16 02:30:52,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:30:52,989 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-11-16 02:30:52,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:30:53,008 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-11-16 02:30:53,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:30:53,029 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-16 02:30:53,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:30:53,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837256597] [2024-11-16 02:30:53,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837256597] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 02:30:53,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 02:30:53,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-16 02:30:53,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018254295] [2024-11-16 02:30:53,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 02:30:53,042 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-16 02:30:53,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:30:53,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-16 02:30:53,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-16 02:30:53,080 INFO L87 Difference]: Start difference. First operand has 29 states, 23 states have (on average 1.391304347826087) internal successors, (32), 24 states have internal predecessors, (32), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-16 02:30:53,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:30:53,103 INFO L93 Difference]: Finished difference Result 54 states and 73 transitions. [2024-11-16 02:30:53,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-16 02:30:53,106 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 29 [2024-11-16 02:30:53,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:30:53,112 INFO L225 Difference]: With dead ends: 54 [2024-11-16 02:30:53,113 INFO L226 Difference]: Without dead ends: 25 [2024-11-16 02:30:53,117 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-16 02:30:53,121 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-16 02:30:53,122 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-16 02:30:53,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2024-11-16 02:30:53,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2024-11-16 02:30:53,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-16 02:30:53,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2024-11-16 02:30:53,162 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 29 [2024-11-16 02:30:53,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:30:53,163 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2024-11-16 02:30:53,163 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-16 02:30:53,163 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2024-11-16 02:30:53,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-16 02:30:53,165 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:30:53,166 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:30:53,166 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-16 02:30:53,167 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:30:53,170 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:30:53,170 INFO L85 PathProgramCache]: Analyzing trace with hash -578091414, now seen corresponding path program 1 times [2024-11-16 02:30:53,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:30:53,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114134223] [2024-11-16 02:30:53,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:30:53,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:30:53,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:30:53,382 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-11-16 02:30:53,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:30:53,419 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-11-16 02:30:53,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:30:53,435 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-11-16 02:30:53,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:30:53,466 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-16 02:30:53,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:30:53,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114134223] [2024-11-16 02:30:53,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114134223] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:30:53,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703555460] [2024-11-16 02:30:53,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:30:53,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:30:53,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:30:53,471 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:30:53,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-16 02:30:53,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:30:53,574 INFO L255 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-16 02:30:53,580 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:30:53,607 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-16 02:30:53,607 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-16 02:30:53,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703555460] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 02:30:53,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-16 02:30:53,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2024-11-16 02:30:53,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596282926] [2024-11-16 02:30:53,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 02:30:53,609 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-16 02:30:53,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:30:53,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-16 02:30:53,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-16 02:30:53,610 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-16 02:30:53,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:30:53,621 INFO L93 Difference]: Finished difference Result 48 states and 58 transitions. [2024-11-16 02:30:53,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-16 02:30:53,622 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 34 [2024-11-16 02:30:53,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:30:53,623 INFO L225 Difference]: With dead ends: 48 [2024-11-16 02:30:53,623 INFO L226 Difference]: Without dead ends: 27 [2024-11-16 02:30:53,625 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-16 02:30:53,626 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 0 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-16 02:30:53,627 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 55 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-16 02:30:53,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-11-16 02:30:53,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2024-11-16 02:30:53,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-16 02:30:53,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2024-11-16 02:30:53,637 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 34 [2024-11-16 02:30:53,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:30:53,637 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2024-11-16 02:30:53,638 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-16 02:30:53,638 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2024-11-16 02:30:53,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-16 02:30:53,640 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:30:53,640 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:30:53,655 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-16 02:30:53,841 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:30:53,841 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:30:53,842 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:30:53,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1001261655, now seen corresponding path program 1 times [2024-11-16 02:30:53,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:30:53,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205498753] [2024-11-16 02:30:53,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:30:53,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:30:53,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:30:53,933 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-16 02:30:53,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:30:53,957 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-11-16 02:30:53,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:30:53,965 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-11-16 02:30:53,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:30:53,990 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-16 02:30:53,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:30:53,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205498753] [2024-11-16 02:30:53,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205498753] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:30:53,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274818078] [2024-11-16 02:30:53,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:30:53,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:30:53,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:30:53,994 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:30:53,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-16 02:30:54,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:30:54,081 INFO L255 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-16 02:30:54,083 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:30:54,092 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-16 02:30:54,093 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-16 02:30:54,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274818078] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 02:30:54,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-16 02:30:54,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 5 [2024-11-16 02:30:54,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604281244] [2024-11-16 02:30:54,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 02:30:54,095 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-16 02:30:54,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:30:54,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-16 02:30:54,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-16 02:30:54,097 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-16 02:30:54,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:30:54,117 INFO L93 Difference]: Finished difference Result 50 states and 63 transitions. [2024-11-16 02:30:54,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-16 02:30:54,120 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2024-11-16 02:30:54,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:30:54,121 INFO L225 Difference]: With dead ends: 50 [2024-11-16 02:30:54,121 INFO L226 Difference]: Without dead ends: 31 [2024-11-16 02:30:54,122 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-16 02:30:54,122 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 3 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-16 02:30:54,123 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 53 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-16 02:30:54,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-11-16 02:30:54,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2024-11-16 02:30:54,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 states have internal predecessors, (28), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-16 02:30:54,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2024-11-16 02:30:54,131 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 36 [2024-11-16 02:30:54,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:30:54,131 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2024-11-16 02:30:54,131 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-16 02:30:54,131 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2024-11-16 02:30:54,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-16 02:30:54,134 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:30:54,135 INFO L215 NwaCegarLoop]: trace histogram [6, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:30:54,150 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-16 02:30:54,335 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2024-11-16 02:30:54,336 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:30:54,336 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:30:54,336 INFO L85 PathProgramCache]: Analyzing trace with hash -387340437, now seen corresponding path program 1 times [2024-11-16 02:30:54,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:30:54,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092814923] [2024-11-16 02:30:54,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:30:54,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:30:54,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:30:54,450 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-16 02:30:54,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:30:54,464 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-11-16 02:30:54,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:30:54,502 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-11-16 02:30:54,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:30:54,511 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-16 02:30:54,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:30:54,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092814923] [2024-11-16 02:30:54,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092814923] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:30:54,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561741757] [2024-11-16 02:30:54,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:30:54,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:30:54,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:30:54,514 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:30:54,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-16 02:30:54,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:30:54,608 INFO L255 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-16 02:30:54,610 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:30:54,633 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-16 02:30:54,634 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-16 02:30:54,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561741757] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 02:30:54,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-16 02:30:54,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2024-11-16 02:30:54,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945125661] [2024-11-16 02:30:54,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 02:30:54,637 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-16 02:30:54,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:30:54,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-16 02:30:54,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-16 02:30:54,638 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-16 02:30:54,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:30:54,650 INFO L93 Difference]: Finished difference Result 47 states and 54 transitions. [2024-11-16 02:30:54,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-16 02:30:54,651 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 48 [2024-11-16 02:30:54,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:30:54,653 INFO L225 Difference]: With dead ends: 47 [2024-11-16 02:30:54,653 INFO L226 Difference]: Without dead ends: 31 [2024-11-16 02:30:54,654 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-16 02:30:54,655 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 0 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-16 02:30:54,656 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 54 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-16 02:30:54,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-11-16 02:30:54,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2024-11-16 02:30:54,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 26 states have internal predecessors, (30), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-16 02:30:54,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2024-11-16 02:30:54,661 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 48 [2024-11-16 02:30:54,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:30:54,662 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2024-11-16 02:30:54,662 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-16 02:30:54,662 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2024-11-16 02:30:54,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-16 02:30:54,663 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:30:54,663 INFO L215 NwaCegarLoop]: trace histogram [6, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:30:54,682 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-16 02:30:54,864 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:30:54,864 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:30:54,865 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:30:54,865 INFO L85 PathProgramCache]: Analyzing trace with hash 544748460, now seen corresponding path program 1 times [2024-11-16 02:30:54,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:30:54,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393886134] [2024-11-16 02:30:54,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:30:54,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:30:54,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:30:54,929 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-16 02:30:54,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:30:54,936 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-11-16 02:30:54,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:30:54,960 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-11-16 02:30:54,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:30:54,968 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-16 02:30:54,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:30:54,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393886134] [2024-11-16 02:30:54,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393886134] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:30:54,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216783349] [2024-11-16 02:30:54,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:30:54,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:30:54,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:30:54,971 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:30:54,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-16 02:30:55,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:30:55,048 INFO L255 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-16 02:30:55,050 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:30:55,095 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-16 02:30:55,096 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 02:30:55,151 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-16 02:30:55,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216783349] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 02:30:55,155 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 02:30:55,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 9 [2024-11-16 02:30:55,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963564481] [2024-11-16 02:30:55,156 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 02:30:55,156 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-16 02:30:55,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:30:55,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-16 02:30:55,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-11-16 02:30:55,158 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-11-16 02:30:55,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:30:55,196 INFO L93 Difference]: Finished difference Result 68 states and 86 transitions. [2024-11-16 02:30:55,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-16 02:30:55,196 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 50 [2024-11-16 02:30:55,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:30:55,197 INFO L225 Difference]: With dead ends: 68 [2024-11-16 02:30:55,197 INFO L226 Difference]: Without dead ends: 43 [2024-11-16 02:30:55,198 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-11-16 02:30:55,199 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 4 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-16 02:30:55,199 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 102 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-16 02:30:55,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-11-16 02:30:55,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41. [2024-11-16 02:30:55,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 36 states have internal predecessors, (41), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-16 02:30:55,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2024-11-16 02:30:55,205 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 50 [2024-11-16 02:30:55,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:30:55,205 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2024-11-16 02:30:55,205 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-11-16 02:30:55,205 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2024-11-16 02:30:55,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-11-16 02:30:55,206 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:30:55,207 INFO L215 NwaCegarLoop]: trace histogram [9, 6, 6, 6, 5, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:30:55,219 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-16 02:30:55,407 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:30:55,408 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:30:55,408 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:30:55,408 INFO L85 PathProgramCache]: Analyzing trace with hash 1763297771, now seen corresponding path program 2 times [2024-11-16 02:30:55,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:30:55,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660065866] [2024-11-16 02:30:55,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:30:55,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:30:55,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:30:55,512 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-11-16 02:30:55,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:30:55,520 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-11-16 02:30:55,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:30:55,530 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-11-16 02:30:55,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:30:55,539 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 134 trivial. 0 not checked. [2024-11-16 02:30:55,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:30:55,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660065866] [2024-11-16 02:30:55,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660065866] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:30:55,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588432516] [2024-11-16 02:30:55,541 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-16 02:30:55,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:30:55,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:30:55,543 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:30:55,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-16 02:30:55,647 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-16 02:30:55,648 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 02:30:55,649 INFO L255 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-16 02:30:55,652 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:30:55,707 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2024-11-16 02:30:55,710 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 02:30:55,808 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2024-11-16 02:30:55,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588432516] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 02:30:55,809 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 02:30:55,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2024-11-16 02:30:55,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678969246] [2024-11-16 02:30:55,810 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 02:30:55,810 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-16 02:30:55,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:30:55,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-16 02:30:55,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2024-11-16 02:30:55,813 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 14 states have internal predecessors, (60), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-16 02:30:55,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:30:55,856 INFO L93 Difference]: Finished difference Result 84 states and 102 transitions. [2024-11-16 02:30:55,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-16 02:30:55,857 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 14 states have internal predecessors, (60), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 68 [2024-11-16 02:30:55,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:30:55,858 INFO L225 Difference]: With dead ends: 84 [2024-11-16 02:30:55,858 INFO L226 Difference]: Without dead ends: 55 [2024-11-16 02:30:55,858 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2024-11-16 02:30:55,859 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-16 02:30:55,861 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 135 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-16 02:30:55,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-11-16 02:30:55,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2024-11-16 02:30:55,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 50 states have (on average 1.1) internal successors, (55), 50 states have internal predecessors, (55), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-16 02:30:55,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 61 transitions. [2024-11-16 02:30:55,870 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 61 transitions. Word has length 68 [2024-11-16 02:30:55,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:30:55,870 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 61 transitions. [2024-11-16 02:30:55,870 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 14 states have internal predecessors, (60), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-16 02:30:55,870 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 61 transitions. [2024-11-16 02:30:55,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2024-11-16 02:30:55,871 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:30:55,872 INFO L215 NwaCegarLoop]: trace histogram [11, 10, 9, 6, 6, 6, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:30:55,885 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-16 02:30:56,074 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:30:56,074 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:30:56,075 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:30:56,075 INFO L85 PathProgramCache]: Analyzing trace with hash 1011082086, now seen corresponding path program 3 times [2024-11-16 02:30:56,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:30:56,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828248101] [2024-11-16 02:30:56,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:30:56,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:30:56,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:30:56,370 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-11-16 02:30:56,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:30:56,380 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-11-16 02:30:56,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:30:56,388 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-11-16 02:30:56,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:30:56,398 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2024-11-16 02:30:56,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:30:56,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828248101] [2024-11-16 02:30:56,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828248101] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:30:56,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697009831] [2024-11-16 02:30:56,399 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-16 02:30:56,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:30:56,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:30:56,401 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:30:56,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-16 02:30:56,496 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-16 02:30:56,496 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 02:30:56,499 INFO L255 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-16 02:30:56,501 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:30:56,557 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 58 proven. 8 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2024-11-16 02:30:56,557 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 02:30:56,632 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 58 proven. 8 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2024-11-16 02:30:56,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697009831] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 02:30:56,633 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 02:30:56,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5, 5] total 19 [2024-11-16 02:30:56,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514053374] [2024-11-16 02:30:56,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 02:30:56,635 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-16 02:30:56,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:30:56,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-16 02:30:56,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2024-11-16 02:30:56,636 INFO L87 Difference]: Start difference. First operand 55 states and 61 transitions. Second operand has 19 states, 19 states have (on average 4.052631578947368) internal successors, (77), 19 states have internal predecessors, (77), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-16 02:30:56,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:30:56,694 INFO L93 Difference]: Finished difference Result 104 states and 127 transitions. [2024-11-16 02:30:56,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-16 02:30:56,698 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.052631578947368) internal successors, (77), 19 states have internal predecessors, (77), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 82 [2024-11-16 02:30:56,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:30:56,699 INFO L225 Difference]: With dead ends: 104 [2024-11-16 02:30:56,700 INFO L226 Difference]: Without dead ends: 73 [2024-11-16 02:30:56,701 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2024-11-16 02:30:56,701 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 17 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-16 02:30:56,702 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 188 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-16 02:30:56,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2024-11-16 02:30:56,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2024-11-16 02:30:56,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 68 states have (on average 1.1323529411764706) internal successors, (77), 68 states have internal predecessors, (77), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-16 02:30:56,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 83 transitions. [2024-11-16 02:30:56,714 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 83 transitions. Word has length 82 [2024-11-16 02:30:56,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:30:56,715 INFO L471 AbstractCegarLoop]: Abstraction has 73 states and 83 transitions. [2024-11-16 02:30:56,715 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.052631578947368) internal successors, (77), 19 states have internal predecessors, (77), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-16 02:30:56,718 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 83 transitions. [2024-11-16 02:30:56,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2024-11-16 02:30:56,720 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:30:56,720 INFO L215 NwaCegarLoop]: trace histogram [21, 18, 18, 18, 12, 11, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:30:56,738 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-16 02:30:56,920 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:30:56,921 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:30:56,921 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:30:56,921 INFO L85 PathProgramCache]: Analyzing trace with hash 2059234733, now seen corresponding path program 4 times [2024-11-16 02:30:56,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:30:56,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684935612] [2024-11-16 02:30:56,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:30:56,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:30:56,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:30:57,326 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-11-16 02:30:57,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:30:57,341 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-11-16 02:30:57,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:30:57,356 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2024-11-16 02:30:57,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:30:57,370 INFO L134 CoverageAnalysis]: Checked inductivity of 876 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 744 trivial. 0 not checked. [2024-11-16 02:30:57,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:30:57,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684935612] [2024-11-16 02:30:57,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684935612] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:30:57,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600621840] [2024-11-16 02:30:57,371 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-16 02:30:57,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:30:57,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:30:57,373 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:30:57,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-16 02:30:57,516 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-16 02:30:57,516 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 02:30:57,520 INFO L255 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-16 02:30:57,523 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:30:57,637 INFO L134 CoverageAnalysis]: Checked inductivity of 876 backedges. 342 proven. 72 refuted. 0 times theorem prover too weak. 462 trivial. 0 not checked. [2024-11-16 02:30:57,638 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 02:30:57,815 INFO L134 CoverageAnalysis]: Checked inductivity of 876 backedges. 0 proven. 418 refuted. 0 times theorem prover too weak. 458 trivial. 0 not checked. [2024-11-16 02:30:57,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600621840] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 02:30:57,815 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 02:30:57,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9, 9] total 28 [2024-11-16 02:30:57,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614928361] [2024-11-16 02:30:57,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 02:30:57,817 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-16 02:30:57,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:30:57,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-16 02:30:57,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=546, Unknown=0, NotChecked=0, Total=756 [2024-11-16 02:30:57,819 INFO L87 Difference]: Start difference. First operand 73 states and 83 transitions. Second operand has 28 states, 28 states have (on average 3.9642857142857144) internal successors, (111), 28 states have internal predecessors, (111), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-16 02:30:57,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:30:57,921 INFO L93 Difference]: Finished difference Result 154 states and 193 transitions. [2024-11-16 02:30:57,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-16 02:30:57,922 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.9642857142857144) internal successors, (111), 28 states have internal predecessors, (111), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 132 [2024-11-16 02:30:57,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:30:57,924 INFO L225 Difference]: With dead ends: 154 [2024-11-16 02:30:57,924 INFO L226 Difference]: Without dead ends: 107 [2024-11-16 02:30:57,925 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 256 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=210, Invalid=546, Unknown=0, NotChecked=0, Total=756 [2024-11-16 02:30:57,925 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 49 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-16 02:30:57,926 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 236 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-16 02:30:57,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2024-11-16 02:30:57,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2024-11-16 02:30:57,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 102 states have (on average 1.1666666666666667) internal successors, (119), 102 states have internal predecessors, (119), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-16 02:30:57,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 125 transitions. [2024-11-16 02:30:57,935 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 125 transitions. Word has length 132 [2024-11-16 02:30:57,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:30:57,936 INFO L471 AbstractCegarLoop]: Abstraction has 107 states and 125 transitions. [2024-11-16 02:30:57,936 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.9642857142857144) internal successors, (111), 28 states have internal predecessors, (111), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-16 02:30:57,936 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 125 transitions. [2024-11-16 02:30:57,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2024-11-16 02:30:57,939 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:30:57,940 INFO L215 NwaCegarLoop]: trace histogram [45, 42, 42, 42, 13, 12, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:30:57,957 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-16 02:30:58,143 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:30:58,144 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:30:58,144 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:30:58,144 INFO L85 PathProgramCache]: Analyzing trace with hash -557434052, now seen corresponding path program 5 times [2024-11-16 02:30:58,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:30:58,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950028834] [2024-11-16 02:30:58,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:30:58,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:30:58,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:30:58,717 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-11-16 02:30:58,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:30:58,744 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2024-11-16 02:30:58,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:30:58,772 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2024-11-16 02:30:58,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:30:58,801 INFO L134 CoverageAnalysis]: Checked inductivity of 3876 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 3720 trivial. 0 not checked. [2024-11-16 02:30:58,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:30:58,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950028834] [2024-11-16 02:30:58,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950028834] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:30:58,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434544884] [2024-11-16 02:30:58,801 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-16 02:30:58,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:30:58,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:30:58,804 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:30:58,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-16 02:30:59,375 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 29 check-sat command(s) [2024-11-16 02:30:59,375 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 02:30:59,379 INFO L255 TraceCheckSpWp]: Trace formula consists of 710 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-16 02:30:59,383 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:30:59,708 INFO L134 CoverageAnalysis]: Checked inductivity of 3876 backedges. 1686 proven. 392 refuted. 0 times theorem prover too weak. 1798 trivial. 0 not checked. [2024-11-16 02:30:59,708 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 02:31:00,087 INFO L134 CoverageAnalysis]: Checked inductivity of 3876 backedges. 0 proven. 2082 refuted. 0 times theorem prover too weak. 1794 trivial. 0 not checked. [2024-11-16 02:31:00,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434544884] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 02:31:00,087 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 02:31:00,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 17] total 35 [2024-11-16 02:31:00,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22307512] [2024-11-16 02:31:00,088 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 02:31:00,089 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-11-16 02:31:00,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:31:00,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-11-16 02:31:00,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=335, Invalid=855, Unknown=0, NotChecked=0, Total=1190 [2024-11-16 02:31:00,090 INFO L87 Difference]: Start difference. First operand 107 states and 125 transitions. Second operand has 35 states, 35 states have (on average 4.0) internal successors, (140), 35 states have internal predecessors, (140), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-16 02:31:00,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:31:00,178 INFO L93 Difference]: Finished difference Result 212 states and 263 transitions. [2024-11-16 02:31:00,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-11-16 02:31:00,178 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 4.0) internal successors, (140), 35 states have internal predecessors, (140), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 230 [2024-11-16 02:31:00,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:31:00,179 INFO L225 Difference]: With dead ends: 212 [2024-11-16 02:31:00,180 INFO L226 Difference]: Without dead ends: 133 [2024-11-16 02:31:00,182 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 479 GetRequests, 436 SyntacticMatches, 10 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=335, Invalid=855, Unknown=0, NotChecked=0, Total=1190 [2024-11-16 02:31:00,183 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 47 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-16 02:31:00,183 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 251 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-16 02:31:00,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2024-11-16 02:31:00,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2024-11-16 02:31:00,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 128 states have (on average 1.1796875) internal successors, (151), 128 states have internal predecessors, (151), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-16 02:31:00,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 157 transitions. [2024-11-16 02:31:00,199 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 157 transitions. Word has length 230 [2024-11-16 02:31:00,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:31:00,199 INFO L471 AbstractCegarLoop]: Abstraction has 133 states and 157 transitions. [2024-11-16 02:31:00,199 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 4.0) internal successors, (140), 35 states have internal predecessors, (140), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-16 02:31:00,199 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 157 transitions. [2024-11-16 02:31:00,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2024-11-16 02:31:00,203 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:31:00,203 INFO L215 NwaCegarLoop]: trace histogram [63, 60, 60, 60, 14, 13, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:31:00,223 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-16 02:31:00,404 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-11-16 02:31:00,404 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:31:00,405 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:31:00,405 INFO L85 PathProgramCache]: Analyzing trace with hash -794457465, now seen corresponding path program 6 times [2024-11-16 02:31:00,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:31:00,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069951313] [2024-11-16 02:31:00,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:31:00,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:31:00,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:31:01,149 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-11-16 02:31:01,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:31:01,188 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2024-11-16 02:31:01,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:31:01,226 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 214 [2024-11-16 02:31:01,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:31:01,264 INFO L134 CoverageAnalysis]: Checked inductivity of 7646 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 7464 trivial. 0 not checked. [2024-11-16 02:31:01,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:31:01,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069951313] [2024-11-16 02:31:01,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069951313] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:31:01,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880829197] [2024-11-16 02:31:01,265 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-16 02:31:01,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:31:01,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:31:01,267 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:31:01,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-16 02:31:01,420 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-11-16 02:31:01,421 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 02:31:01,423 INFO L255 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-16 02:31:01,427 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:31:01,475 INFO L134 CoverageAnalysis]: Checked inductivity of 7646 backedges. 3372 proven. 6 refuted. 0 times theorem prover too weak. 4268 trivial. 0 not checked. [2024-11-16 02:31:01,475 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 02:31:01,543 INFO L134 CoverageAnalysis]: Checked inductivity of 7646 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 7640 trivial. 0 not checked. [2024-11-16 02:31:01,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880829197] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 02:31:01,543 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 02:31:01,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 5, 5] total 22 [2024-11-16 02:31:01,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425562779] [2024-11-16 02:31:01,544 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 02:31:01,545 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-16 02:31:01,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:31:01,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-16 02:31:01,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=315, Unknown=0, NotChecked=0, Total=462 [2024-11-16 02:31:01,546 INFO L87 Difference]: Start difference. First operand 133 states and 157 transitions. Second operand has 22 states, 22 states have (on average 3.4545454545454546) internal successors, (76), 22 states have internal predecessors, (76), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-16 02:31:01,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:31:01,583 INFO L93 Difference]: Finished difference Result 246 states and 298 transitions. [2024-11-16 02:31:01,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-16 02:31:01,583 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.4545454545454546) internal successors, (76), 22 states have internal predecessors, (76), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 304 [2024-11-16 02:31:01,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:31:01,585 INFO L225 Difference]: With dead ends: 246 [2024-11-16 02:31:01,585 INFO L226 Difference]: Without dead ends: 143 [2024-11-16 02:31:01,585 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 628 GetRequests, 608 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=147, Invalid=315, Unknown=0, NotChecked=0, Total=462 [2024-11-16 02:31:01,586 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-16 02:31:01,586 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 142 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-16 02:31:01,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2024-11-16 02:31:01,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2024-11-16 02:31:01,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 138 states have (on average 1.1666666666666667) internal successors, (161), 138 states have internal predecessors, (161), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-16 02:31:01,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 167 transitions. [2024-11-16 02:31:01,596 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 167 transitions. Word has length 304 [2024-11-16 02:31:01,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:31:01,598 INFO L471 AbstractCegarLoop]: Abstraction has 143 states and 167 transitions. [2024-11-16 02:31:01,598 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.4545454545454546) internal successors, (76), 22 states have internal predecessors, (76), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-16 02:31:01,598 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 167 transitions. [2024-11-16 02:31:01,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2024-11-16 02:31:01,602 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:31:01,603 INFO L215 NwaCegarLoop]: trace histogram [63, 60, 60, 60, 15, 14, 7, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:31:01,621 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-16 02:31:01,803 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-16 02:31:01,804 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:31:01,804 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:31:01,804 INFO L85 PathProgramCache]: Analyzing trace with hash -141209590, now seen corresponding path program 7 times [2024-11-16 02:31:01,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:31:01,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704950853] [2024-11-16 02:31:01,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:31:01,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:31:01,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:31:02,484 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-11-16 02:31:02,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:31:02,513 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2024-11-16 02:31:02,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:31:02,541 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 224 [2024-11-16 02:31:02,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:31:02,574 INFO L134 CoverageAnalysis]: Checked inductivity of 7710 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 7500 trivial. 0 not checked. [2024-11-16 02:31:02,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:31:02,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704950853] [2024-11-16 02:31:02,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704950853] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:31:02,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493288346] [2024-11-16 02:31:02,575 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-16 02:31:02,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:31:02,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:31:02,577 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:31:02,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-16 02:31:02,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:31:02,864 INFO L255 TraceCheckSpWp]: Trace formula consists of 1037 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-16 02:31:02,868 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:31:02,919 INFO L134 CoverageAnalysis]: Checked inductivity of 7710 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 7500 trivial. 0 not checked. [2024-11-16 02:31:02,919 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 02:31:03,148 INFO L134 CoverageAnalysis]: Checked inductivity of 7710 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 7500 trivial. 0 not checked. [2024-11-16 02:31:03,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493288346] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 02:31:03,149 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 02:31:03,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 23 [2024-11-16 02:31:03,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100436482] [2024-11-16 02:31:03,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 02:31:03,150 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-16 02:31:03,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:31:03,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-16 02:31:03,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2024-11-16 02:31:03,151 INFO L87 Difference]: Start difference. First operand 143 states and 167 transitions. Second operand has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 23 states have internal predecessors, (73), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-11-16 02:31:03,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:31:03,187 INFO L93 Difference]: Finished difference Result 266 states and 319 transitions. [2024-11-16 02:31:03,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-16 02:31:03,188 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 23 states have internal predecessors, (73), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 314 [2024-11-16 02:31:03,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:31:03,189 INFO L225 Difference]: With dead ends: 266 [2024-11-16 02:31:03,190 INFO L226 Difference]: Without dead ends: 155 [2024-11-16 02:31:03,191 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 649 GetRequests, 618 SyntacticMatches, 10 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2024-11-16 02:31:03,191 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 0 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-16 02:31:03,192 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 174 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-16 02:31:03,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2024-11-16 02:31:03,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2024-11-16 02:31:03,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 150 states have (on average 1.1533333333333333) internal successors, (173), 150 states have internal predecessors, (173), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-16 02:31:03,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 179 transitions. [2024-11-16 02:31:03,208 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 179 transitions. Word has length 314 [2024-11-16 02:31:03,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:31:03,209 INFO L471 AbstractCegarLoop]: Abstraction has 155 states and 179 transitions. [2024-11-16 02:31:03,209 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 23 states have internal predecessors, (73), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-11-16 02:31:03,209 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 179 transitions. [2024-11-16 02:31:03,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2024-11-16 02:31:03,212 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:31:03,213 INFO L215 NwaCegarLoop]: trace histogram [63, 60, 60, 60, 21, 20, 7, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:31:03,231 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-16 02:31:03,413 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-16 02:31:03,414 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:31:03,414 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:31:03,414 INFO L85 PathProgramCache]: Analyzing trace with hash -114264764, now seen corresponding path program 8 times [2024-11-16 02:31:03,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:31:03,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677311008] [2024-11-16 02:31:03,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:31:03,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:31:03,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:31:03,877 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-11-16 02:31:03,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:31:03,899 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2024-11-16 02:31:03,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:31:03,919 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 236 [2024-11-16 02:31:03,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:31:03,945 INFO L134 CoverageAnalysis]: Checked inductivity of 7920 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 7878 trivial. 0 not checked. [2024-11-16 02:31:03,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:31:03,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677311008] [2024-11-16 02:31:03,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677311008] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:31:03,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973049634] [2024-11-16 02:31:03,946 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-16 02:31:03,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:31:03,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:31:03,948 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:31:03,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-16 02:31:04,220 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-16 02:31:04,221 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 02:31:04,227 INFO L255 TraceCheckSpWp]: Trace formula consists of 1097 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-16 02:31:04,232 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:31:04,259 INFO L134 CoverageAnalysis]: Checked inductivity of 7920 backedges. 3372 proven. 42 refuted. 0 times theorem prover too weak. 4506 trivial. 0 not checked. [2024-11-16 02:31:04,260 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 02:31:04,366 INFO L134 CoverageAnalysis]: Checked inductivity of 7920 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 7878 trivial. 0 not checked. [2024-11-16 02:31:04,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973049634] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 02:31:04,367 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 02:31:04,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2024-11-16 02:31:04,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287240210] [2024-11-16 02:31:04,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 02:31:04,368 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-16 02:31:04,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:31:04,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-16 02:31:04,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2024-11-16 02:31:04,369 INFO L87 Difference]: Start difference. First operand 155 states and 179 transitions. Second operand has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 17 states have internal predecessors, (60), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-16 02:31:04,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:31:04,394 INFO L93 Difference]: Finished difference Result 263 states and 315 transitions. [2024-11-16 02:31:04,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-16 02:31:04,395 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 17 states have internal predecessors, (60), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 326 [2024-11-16 02:31:04,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:31:04,396 INFO L225 Difference]: With dead ends: 263 [2024-11-16 02:31:04,396 INFO L226 Difference]: Without dead ends: 171 [2024-11-16 02:31:04,397 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 665 GetRequests, 650 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2024-11-16 02:31:04,397 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 0 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-16 02:31:04,398 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 115 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-16 02:31:04,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2024-11-16 02:31:04,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2024-11-16 02:31:04,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 166 states have (on average 1.1385542168674698) internal successors, (189), 166 states have internal predecessors, (189), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-16 02:31:04,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 195 transitions. [2024-11-16 02:31:04,405 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 195 transitions. Word has length 326 [2024-11-16 02:31:04,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:31:04,406 INFO L471 AbstractCegarLoop]: Abstraction has 171 states and 195 transitions. [2024-11-16 02:31:04,406 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 17 states have internal predecessors, (60), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-16 02:31:04,406 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 195 transitions. [2024-11-16 02:31:04,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2024-11-16 02:31:04,410 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:31:04,410 INFO L215 NwaCegarLoop]: trace histogram [63, 60, 60, 60, 21, 20, 15, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:31:04,428 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-16 02:31:04,610 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-16 02:31:04,611 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:31:04,611 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:31:04,611 INFO L85 PathProgramCache]: Analyzing trace with hash 106829388, now seen corresponding path program 9 times [2024-11-16 02:31:04,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:31:04,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865022422] [2024-11-16 02:31:04,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:31:04,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:31:04,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:31:05,341 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-11-16 02:31:05,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:31:05,361 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2024-11-16 02:31:05,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:31:05,383 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 252 [2024-11-16 02:31:05,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:31:05,410 INFO L134 CoverageAnalysis]: Checked inductivity of 8088 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 7878 trivial. 0 not checked. [2024-11-16 02:31:05,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:31:05,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865022422] [2024-11-16 02:31:05,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865022422] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:31:05,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194828000] [2024-11-16 02:31:05,411 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-16 02:31:05,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:31:05,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:31:05,414 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:31:05,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-16 02:31:06,485 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2024-11-16 02:31:06,485 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 02:31:06,490 INFO L255 TraceCheckSpWp]: Trace formula consists of 706 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-16 02:31:06,494 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:31:06,568 INFO L134 CoverageAnalysis]: Checked inductivity of 8088 backedges. 3372 proven. 210 refuted. 0 times theorem prover too weak. 4506 trivial. 0 not checked. [2024-11-16 02:31:06,569 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 02:31:06,772 INFO L134 CoverageAnalysis]: Checked inductivity of 8088 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 7878 trivial. 0 not checked. [2024-11-16 02:31:06,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194828000] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 02:31:06,773 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 02:31:06,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 22 [2024-11-16 02:31:06,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630543769] [2024-11-16 02:31:06,773 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 02:31:06,774 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-16 02:31:06,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:31:06,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-16 02:31:06,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2024-11-16 02:31:06,775 INFO L87 Difference]: Start difference. First operand 171 states and 195 transitions. Second operand has 22 states, 22 states have (on average 3.227272727272727) internal successors, (71), 22 states have internal predecessors, (71), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-16 02:31:06,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:31:06,816 INFO L93 Difference]: Finished difference Result 273 states and 322 transitions. [2024-11-16 02:31:06,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-16 02:31:06,817 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.227272727272727) internal successors, (71), 22 states have internal predecessors, (71), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 342 [2024-11-16 02:31:06,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:31:06,818 INFO L225 Difference]: With dead ends: 273 [2024-11-16 02:31:06,818 INFO L226 Difference]: Without dead ends: 181 [2024-11-16 02:31:06,819 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 705 GetRequests, 674 SyntacticMatches, 11 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2024-11-16 02:31:06,820 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 0 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-16 02:31:06,820 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 217 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-16 02:31:06,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2024-11-16 02:31:06,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2024-11-16 02:31:06,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 176 states have (on average 1.1306818181818181) internal successors, (199), 176 states have internal predecessors, (199), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-16 02:31:06,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 205 transitions. [2024-11-16 02:31:06,828 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 205 transitions. Word has length 342 [2024-11-16 02:31:06,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:31:06,829 INFO L471 AbstractCegarLoop]: Abstraction has 181 states and 205 transitions. [2024-11-16 02:31:06,830 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.227272727272727) internal successors, (71), 22 states have internal predecessors, (71), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-16 02:31:06,830 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 205 transitions. [2024-11-16 02:31:06,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 353 [2024-11-16 02:31:06,834 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:31:06,834 INFO L215 NwaCegarLoop]: trace histogram [63, 60, 60, 60, 21, 20, 20, 19, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:31:06,856 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-16 02:31:07,039 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-16 02:31:07,040 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:31:07,040 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:31:07,040 INFO L85 PathProgramCache]: Analyzing trace with hash 110585041, now seen corresponding path program 10 times [2024-11-16 02:31:07,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:31:07,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779752184] [2024-11-16 02:31:07,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:31:07,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:31:09,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:31:16,228 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-11-16 02:31:16,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:31:17,224 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2024-11-16 02:31:17,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:31:17,853 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 262 [2024-11-16 02:31:17,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:31:19,902 INFO L134 CoverageAnalysis]: Checked inductivity of 8258 backedges. 156 proven. 7422 refuted. 0 times theorem prover too weak. 680 trivial. 0 not checked. [2024-11-16 02:31:19,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:31:19,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779752184] [2024-11-16 02:31:19,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779752184] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:31:19,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286193295] [2024-11-16 02:31:19,903 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-16 02:31:19,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:31:19,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:31:19,905 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:31:19,906 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-16 02:31:20,292 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-16 02:31:20,292 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 02:31:20,309 INFO L255 TraceCheckSpWp]: Trace formula consists of 1201 conjuncts, 307 conjuncts are in the unsatisfiable core [2024-11-16 02:31:20,322 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:31:23,214 INFO L134 CoverageAnalysis]: Checked inductivity of 8258 backedges. 0 proven. 7360 refuted. 0 times theorem prover too weak. 898 trivial. 0 not checked. [2024-11-16 02:31:23,214 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 02:31:26,544 INFO L134 CoverageAnalysis]: Checked inductivity of 8258 backedges. 0 proven. 7200 refuted. 0 times theorem prover too weak. 1058 trivial. 0 not checked. [2024-11-16 02:31:26,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286193295] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 02:31:26,545 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 02:31:26,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 70, 30] total 132 [2024-11-16 02:31:26,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762242546] [2024-11-16 02:31:26,545 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 02:31:26,546 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 132 states [2024-11-16 02:31:26,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:31:26,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2024-11-16 02:31:26,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=456, Invalid=16836, Unknown=0, NotChecked=0, Total=17292 [2024-11-16 02:31:26,552 INFO L87 Difference]: Start difference. First operand 181 states and 205 transitions. Second operand has 132 states, 130 states have (on average 2.8846153846153846) internal successors, (375), 126 states have internal predecessors, (375), 6 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2024-11-16 02:31:30,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:31:30,555 INFO L93 Difference]: Finished difference Result 1044 states and 1283 transitions. [2024-11-16 02:31:30,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2024-11-16 02:31:30,556 INFO L78 Accepts]: Start accepts. Automaton has has 132 states, 130 states have (on average 2.8846153846153846) internal successors, (375), 126 states have internal predecessors, (375), 6 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 352 [2024-11-16 02:31:30,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:31:30,565 INFO L225 Difference]: With dead ends: 1044 [2024-11-16 02:31:30,566 INFO L226 Difference]: Without dead ends: 1040 [2024-11-16 02:31:30,573 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 822 GetRequests, 663 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8348 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=636, Invalid=25124, Unknown=0, NotChecked=0, Total=25760 [2024-11-16 02:31:30,574 INFO L432 NwaCegarLoop]: 71 mSDtfsCounter, 74 mSDsluCounter, 4178 mSDsCounter, 0 mSdLazyCounter, 8467 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 4249 SdHoareTripleChecker+Invalid, 8552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 8467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2024-11-16 02:31:30,574 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 4249 Invalid, 8552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 8467 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2024-11-16 02:31:30,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1040 states. [2024-11-16 02:31:30,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1040 to 739. [2024-11-16 02:31:30,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 739 states, 731 states have (on average 1.225718194254446) internal successors, (896), 732 states have internal predecessors, (896), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2024-11-16 02:31:30,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 739 states to 739 states and 910 transitions. [2024-11-16 02:31:30,612 INFO L78 Accepts]: Start accepts. Automaton has 739 states and 910 transitions. Word has length 352 [2024-11-16 02:31:30,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:31:30,613 INFO L471 AbstractCegarLoop]: Abstraction has 739 states and 910 transitions. [2024-11-16 02:31:30,613 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 132 states, 130 states have (on average 2.8846153846153846) internal successors, (375), 126 states have internal predecessors, (375), 6 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2024-11-16 02:31:30,613 INFO L276 IsEmpty]: Start isEmpty. Operand 739 states and 910 transitions. [2024-11-16 02:31:30,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 353 [2024-11-16 02:31:30,618 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:31:30,618 INFO L215 NwaCegarLoop]: trace histogram [63, 60, 60, 59, 21, 20, 20, 19, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:31:30,640 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-16 02:31:30,818 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-16 02:31:30,819 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:31:30,819 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:31:30,819 INFO L85 PathProgramCache]: Analyzing trace with hash -85928464, now seen corresponding path program 1 times [2024-11-16 02:31:30,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:31:30,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22417528] [2024-11-16 02:31:30,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:31:30,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:31:32,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:31:40,701 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-11-16 02:31:40,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:31:41,331 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2024-11-16 02:31:41,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:31:41,367 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 262 [2024-11-16 02:31:41,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:31:42,531 INFO L134 CoverageAnalysis]: Checked inductivity of 8258 backedges. 1687 proven. 4806 refuted. 0 times theorem prover too weak. 1765 trivial. 0 not checked. [2024-11-16 02:31:42,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:31:42,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22417528] [2024-11-16 02:31:42,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22417528] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:31:42,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989660687] [2024-11-16 02:31:42,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:31:42,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:31:42,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:31:42,535 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:31:42,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-16 02:31:43,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:31:43,058 INFO L255 TraceCheckSpWp]: Trace formula consists of 1200 conjuncts, 81 conjuncts are in the unsatisfiable core [2024-11-16 02:31:43,065 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:31:43,443 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 32 treesize of output 13 [2024-11-16 02:31:43,801 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-11-16 02:31:43,935 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-16 02:31:45,968 INFO L134 CoverageAnalysis]: Checked inductivity of 8258 backedges. 8 proven. 6024 refuted. 0 times theorem prover too weak. 2226 trivial. 0 not checked. [2024-11-16 02:31:45,968 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 02:31:48,496 INFO L349 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2024-11-16 02:31:48,496 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2024-11-16 02:31:48,709 INFO L134 CoverageAnalysis]: Checked inductivity of 8258 backedges. 1762 proven. 4227 refuted. 0 times theorem prover too weak. 2269 trivial. 0 not checked. [2024-11-16 02:31:48,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989660687] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 02:31:48,710 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 02:31:48,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 36, 32] total 109 [2024-11-16 02:31:48,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874232091] [2024-11-16 02:31:48,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 02:31:48,711 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2024-11-16 02:31:48,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:31:48,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2024-11-16 02:31:48,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=389, Invalid=11383, Unknown=0, NotChecked=0, Total=11772 [2024-11-16 02:31:48,719 INFO L87 Difference]: Start difference. First operand 739 states and 910 transitions. Second operand has 109 states, 107 states have (on average 3.467289719626168) internal successors, (371), 106 states have internal predecessors, (371), 6 states have call successors, (8), 3 states have call predecessors, (8), 7 states have return successors, (9), 5 states have call predecessors, (9), 6 states have call successors, (9)