./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/loop-simple/deep-nested.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6ae2ee47 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/loop-simple/deep-nested.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f4fa4f6a03e1cc5362361e8e2a443a39504511936859bef102e6d3337f038be8 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-6ae2ee4-m [2023-11-22 19:07:38,053 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-22 19:07:38,097 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-22 19:07:38,101 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-22 19:07:38,101 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-22 19:07:38,122 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-22 19:07:38,123 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-22 19:07:38,123 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-22 19:07:38,124 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-22 19:07:38,124 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-22 19:07:38,124 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-22 19:07:38,125 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-22 19:07:38,125 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-22 19:07:38,125 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-22 19:07:38,126 INFO L153 SettingsManager]: * Use SBE=true [2023-11-22 19:07:38,126 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-22 19:07:38,126 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-22 19:07:38,126 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-22 19:07:38,127 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-22 19:07:38,127 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-22 19:07:38,127 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-22 19:07:38,128 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-22 19:07:38,128 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-22 19:07:38,128 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-22 19:07:38,128 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-22 19:07:38,129 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-22 19:07:38,129 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-22 19:07:38,129 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-22 19:07:38,129 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-22 19:07:38,130 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-22 19:07:38,130 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-22 19:07:38,130 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-22 19:07:38,130 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-22 19:07:38,130 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-22 19:07:38,131 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-22 19:07:38,131 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-22 19:07:38,131 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-22 19:07:38,131 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-22 19:07:38,131 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-22 19:07:38,131 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-22 19:07:38,132 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-22 19:07:38,132 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-22 19:07:38,132 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f4fa4f6a03e1cc5362361e8e2a443a39504511936859bef102e6d3337f038be8 [2023-11-22 19:07:38,347 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-22 19:07:38,367 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-22 19:07:38,369 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-22 19:07:38,370 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-22 19:07:38,370 INFO L274 PluginConnector]: CDTParser initialized [2023-11-22 19:07:38,371 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-simple/deep-nested.c [2023-11-22 19:07:39,444 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-22 19:07:39,602 INFO L384 CDTParser]: Found 1 translation units. [2023-11-22 19:07:39,603 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-simple/deep-nested.c [2023-11-22 19:07:39,609 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/588c2a0b4/0850ecb0de5c4de5a6c53752766a8ac8/FLAGae5097a43 [2023-11-22 19:07:39,624 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/588c2a0b4/0850ecb0de5c4de5a6c53752766a8ac8 [2023-11-22 19:07:39,627 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-22 19:07:39,629 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-22 19:07:39,630 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-22 19:07:39,630 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-22 19:07:39,633 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-22 19:07:39,634 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 07:07:39" (1/1) ... [2023-11-22 19:07:39,635 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3dcc5692 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 07:07:39, skipping insertion in model container [2023-11-22 19:07:39,635 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 07:07:39" (1/1) ... [2023-11-22 19:07:39,651 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-22 19:07:39,754 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-simple/deep-nested.c[863,876] [2023-11-22 19:07:39,759 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-22 19:07:39,767 INFO L202 MainTranslator]: Completed pre-run [2023-11-22 19:07:39,781 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-simple/deep-nested.c[863,876] [2023-11-22 19:07:39,787 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-22 19:07:39,797 INFO L206 MainTranslator]: Completed translation [2023-11-22 19:07:39,797 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 07:07:39 WrapperNode [2023-11-22 19:07:39,797 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-22 19:07:39,798 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-22 19:07:39,798 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-22 19:07:39,798 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-22 19:07:39,803 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 07:07:39" (1/1) ... [2023-11-22 19:07:39,807 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 07:07:39" (1/1) ... [2023-11-22 19:07:39,821 INFO L138 Inliner]: procedures = 10, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 60 [2023-11-22 19:07:39,821 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-22 19:07:39,822 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-22 19:07:39,822 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-22 19:07:39,822 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-22 19:07:39,830 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 07:07:39" (1/1) ... [2023-11-22 19:07:39,830 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 07:07:39" (1/1) ... [2023-11-22 19:07:39,831 INFO L184 PluginConnector]: Executing the observer HeapSplitter from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 07:07:39" (1/1) ... [2023-11-22 19:07:39,837 INFO L189 HeapSplitter]: Split 2 memory accesses to 1 slices as follows [2] [2023-11-22 19:07:39,838 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 07:07:39" (1/1) ... [2023-11-22 19:07:39,838 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 07:07:39" (1/1) ... [2023-11-22 19:07:39,840 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 07:07:39" (1/1) ... [2023-11-22 19:07:39,842 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 07:07:39" (1/1) ... [2023-11-22 19:07:39,849 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 07:07:39" (1/1) ... [2023-11-22 19:07:39,849 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 07:07:39" (1/1) ... [2023-11-22 19:07:39,851 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-22 19:07:39,851 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-22 19:07:39,851 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-22 19:07:39,852 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-22 19:07:39,852 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 07:07:39" (1/1) ... [2023-11-22 19:07:39,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-22 19:07:39,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 19:07:39,882 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-22 19:07:39,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-22 19:07:39,929 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-22 19:07:39,929 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-22 19:07:39,930 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-22 19:07:39,930 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-22 19:07:39,975 INFO L241 CfgBuilder]: Building ICFG [2023-11-22 19:07:39,977 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-22 19:07:40,131 INFO L282 CfgBuilder]: Performing block encoding [2023-11-22 19:07:40,148 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-22 19:07:40,148 INFO L309 CfgBuilder]: Removed 5 assume(true) statements. [2023-11-22 19:07:40,149 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 07:07:40 BoogieIcfgContainer [2023-11-22 19:07:40,149 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-22 19:07:40,150 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-22 19:07:40,150 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-22 19:07:40,168 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-22 19:07:40,168 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 07:07:39" (1/3) ... [2023-11-22 19:07:40,169 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4794aa79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 07:07:40, skipping insertion in model container [2023-11-22 19:07:40,169 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 07:07:39" (2/3) ... [2023-11-22 19:07:40,169 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4794aa79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 07:07:40, skipping insertion in model container [2023-11-22 19:07:40,169 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 07:07:40" (3/3) ... [2023-11-22 19:07:40,170 INFO L112 eAbstractionObserver]: Analyzing ICFG deep-nested.c [2023-11-22 19:07:40,185 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-22 19:07:40,185 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-22 19:07:40,272 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-22 19:07:40,278 INFO L357 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, mHoare=true, 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;@5275239e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-22 19:07:40,278 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-22 19:07:40,281 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 19:07:40,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-22 19:07:40,286 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 19:07:40,286 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 19:07:40,287 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 19:07:40,291 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 19:07:40,291 INFO L85 PathProgramCache]: Analyzing trace with hash -1672362000, now seen corresponding path program 1 times [2023-11-22 19:07:40,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 19:07:40,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572256329] [2023-11-22 19:07:40,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 19:07:40,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 19:07:40,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 19:07:40,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 19:07:40,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 19:07:40,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572256329] [2023-11-22 19:07:40,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572256329] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 19:07:40,617 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 19:07:40,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-22 19:07:40,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789315858] [2023-11-22 19:07:40,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 19:07:40,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-22 19:07:40,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 19:07:40,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-22 19:07:40,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-22 19:07:40,641 INFO L87 Difference]: Start difference. First operand has 16 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 19:07:40,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 19:07:40,719 INFO L93 Difference]: Finished difference Result 34 states and 57 transitions. [2023-11-22 19:07:40,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-22 19:07:40,722 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-11-22 19:07:40,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 19:07:40,728 INFO L225 Difference]: With dead ends: 34 [2023-11-22 19:07:40,728 INFO L226 Difference]: Without dead ends: 17 [2023-11-22 19:07:40,731 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-22 19:07:40,737 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 19 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-22 19:07:40,738 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 10 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-22 19:07:40,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-11-22 19:07:40,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2023-11-22 19:07:40,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 19:07:40,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2023-11-22 19:07:40,777 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 8 [2023-11-22 19:07:40,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 19:07:40,777 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2023-11-22 19:07:40,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 19:07:40,778 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2023-11-22 19:07:40,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-22 19:07:40,778 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 19:07:40,779 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 19:07:40,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-22 19:07:40,780 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 19:07:40,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 19:07:40,780 INFO L85 PathProgramCache]: Analyzing trace with hash 288176442, now seen corresponding path program 1 times [2023-11-22 19:07:40,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 19:07:40,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658890453] [2023-11-22 19:07:40,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 19:07:40,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 19:07:40,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 19:07:41,125 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 19:07:41,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 19:07:41,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658890453] [2023-11-22 19:07:41,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658890453] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 19:07:41,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 19:07:41,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-22 19:07:41,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199338022] [2023-11-22 19:07:41,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 19:07:41,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-22 19:07:41,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 19:07:41,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-22 19:07:41,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-22 19:07:41,132 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 19:07:41,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 19:07:41,185 INFO L93 Difference]: Finished difference Result 31 states and 39 transitions. [2023-11-22 19:07:41,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-22 19:07:41,185 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-11-22 19:07:41,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 19:07:41,187 INFO L225 Difference]: With dead ends: 31 [2023-11-22 19:07:41,187 INFO L226 Difference]: Without dead ends: 29 [2023-11-22 19:07:41,188 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-22 19:07:41,189 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 7 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-22 19:07:41,189 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 11 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-22 19:07:41,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-11-22 19:07:41,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2023-11-22 19:07:41,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 26 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 19:07:41,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 35 transitions. [2023-11-22 19:07:41,200 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 35 transitions. Word has length 11 [2023-11-22 19:07:41,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 19:07:41,200 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 35 transitions. [2023-11-22 19:07:41,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 19:07:41,200 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 35 transitions. [2023-11-22 19:07:41,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-22 19:07:41,201 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 19:07:41,201 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 19:07:41,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-22 19:07:41,201 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 19:07:41,202 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 19:07:41,202 INFO L85 PathProgramCache]: Analyzing trace with hash 22882177, now seen corresponding path program 1 times [2023-11-22 19:07:41,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 19:07:41,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367049324] [2023-11-22 19:07:41,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 19:07:41,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 19:07:41,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 19:07:41,333 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-22 19:07:41,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 19:07:41,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367049324] [2023-11-22 19:07:41,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367049324] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 19:07:41,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273381110] [2023-11-22 19:07:41,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 19:07:41,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 19:07:41,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 19:07:41,336 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) [2023-11-22 19:07:41,357 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-22 19:07:41,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 19:07:41,372 INFO L262 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-22 19:07:41,376 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 19:07:41,407 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 19:07:41,407 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-22 19:07:41,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273381110] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 19:07:41,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-22 19:07:41,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2023-11-22 19:07:41,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057193831] [2023-11-22 19:07:41,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 19:07:41,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-22 19:07:41,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 19:07:41,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-22 19:07:41,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-22 19:07:41,409 INFO L87 Difference]: Start difference. First operand 27 states and 35 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 19:07:41,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 19:07:41,471 INFO L93 Difference]: Finished difference Result 66 states and 86 transitions. [2023-11-22 19:07:41,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-22 19:07:41,471 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-11-22 19:07:41,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 19:07:41,472 INFO L225 Difference]: With dead ends: 66 [2023-11-22 19:07:41,472 INFO L226 Difference]: Without dead ends: 51 [2023-11-22 19:07:41,483 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-11-22 19:07:41,483 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 50 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-22 19:07:41,484 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 14 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-22 19:07:41,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-11-22 19:07:41,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 29. [2023-11-22 19:07:41,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.3214285714285714) internal successors, (37), 28 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 19:07:41,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 37 transitions. [2023-11-22 19:07:41,491 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 37 transitions. Word has length 14 [2023-11-22 19:07:41,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 19:07:41,492 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 37 transitions. [2023-11-22 19:07:41,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 19:07:41,492 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 37 transitions. [2023-11-22 19:07:41,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-22 19:07:41,493 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 19:07:41,493 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 19:07:41,507 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-22 19:07:41,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 19:07:41,694 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 19:07:41,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 19:07:41,694 INFO L85 PathProgramCache]: Analyzing trace with hash -4911268, now seen corresponding path program 1 times [2023-11-22 19:07:41,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 19:07:41,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101437373] [2023-11-22 19:07:41,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 19:07:41,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 19:07:41,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 19:07:41,857 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 19:07:41,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 19:07:41,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101437373] [2023-11-22 19:07:41,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101437373] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 19:07:41,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343296602] [2023-11-22 19:07:41,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 19:07:41,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 19:07:41,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 19:07:41,880 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) [2023-11-22 19:07:41,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-22 19:07:41,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 19:07:41,916 INFO L262 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-22 19:07:41,917 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 19:07:41,948 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-22 19:07:41,948 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-22 19:07:41,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343296602] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 19:07:41,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-22 19:07:41,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2023-11-22 19:07:41,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575379594] [2023-11-22 19:07:41,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 19:07:41,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-22 19:07:41,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 19:07:41,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-22 19:07:41,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-11-22 19:07:41,956 INFO L87 Difference]: Start difference. First operand 29 states and 37 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 19:07:42,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 19:07:42,036 INFO L93 Difference]: Finished difference Result 75 states and 97 transitions. [2023-11-22 19:07:42,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-22 19:07:42,037 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-11-22 19:07:42,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 19:07:42,039 INFO L225 Difference]: With dead ends: 75 [2023-11-22 19:07:42,039 INFO L226 Difference]: Without dead ends: 49 [2023-11-22 19:07:42,039 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2023-11-22 19:07:42,041 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 90 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-22 19:07:42,041 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 12 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-22 19:07:42,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-11-22 19:07:42,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 31. [2023-11-22 19:07:42,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.3) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 19:07:42,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 39 transitions. [2023-11-22 19:07:42,054 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 39 transitions. Word has length 17 [2023-11-22 19:07:42,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 19:07:42,055 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 39 transitions. [2023-11-22 19:07:42,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 19:07:42,055 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 39 transitions. [2023-11-22 19:07:42,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-22 19:07:42,056 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 19:07:42,056 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 19:07:42,068 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-22 19:07:42,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-11-22 19:07:42,268 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 19:07:42,268 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 19:07:42,268 INFO L85 PathProgramCache]: Analyzing trace with hash -332318709, now seen corresponding path program 1 times [2023-11-22 19:07:42,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 19:07:42,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464770318] [2023-11-22 19:07:42,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 19:07:42,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 19:07:42,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 19:07:42,463 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-22 19:07:42,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 19:07:42,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464770318] [2023-11-22 19:07:42,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464770318] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 19:07:42,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284732229] [2023-11-22 19:07:42,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 19:07:42,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 19:07:42,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 19:07:42,465 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) [2023-11-22 19:07:42,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-22 19:07:42,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 19:07:42,497 INFO L262 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-22 19:07:42,498 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 19:07:42,531 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-22 19:07:42,531 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-22 19:07:42,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284732229] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 19:07:42,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-22 19:07:42,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2023-11-22 19:07:42,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992012277] [2023-11-22 19:07:42,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 19:07:42,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-22 19:07:42,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 19:07:42,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-22 19:07:42,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-11-22 19:07:42,533 INFO L87 Difference]: Start difference. First operand 31 states and 39 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 19:07:42,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 19:07:42,589 INFO L93 Difference]: Finished difference Result 75 states and 95 transitions. [2023-11-22 19:07:42,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-22 19:07:42,590 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-11-22 19:07:42,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 19:07:42,590 INFO L225 Difference]: With dead ends: 75 [2023-11-22 19:07:42,590 INFO L226 Difference]: Without dead ends: 47 [2023-11-22 19:07:42,591 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2023-11-22 19:07:42,591 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 73 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-22 19:07:42,592 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 12 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-22 19:07:42,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-11-22 19:07:42,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 33. [2023-11-22 19:07:42,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.28125) internal successors, (41), 32 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 19:07:42,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 41 transitions. [2023-11-22 19:07:42,597 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 41 transitions. Word has length 20 [2023-11-22 19:07:42,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 19:07:42,598 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 41 transitions. [2023-11-22 19:07:42,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 19:07:42,598 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 41 transitions. [2023-11-22 19:07:42,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-22 19:07:42,598 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 19:07:42,599 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 19:07:42,628 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-22 19:07:42,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 19:07:42,812 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 19:07:42,813 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 19:07:42,813 INFO L85 PathProgramCache]: Analyzing trace with hash -1991159868, now seen corresponding path program 1 times [2023-11-22 19:07:42,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 19:07:42,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168519751] [2023-11-22 19:07:42,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 19:07:42,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 19:07:42,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 19:07:42,978 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-22 19:07:42,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 19:07:42,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168519751] [2023-11-22 19:07:42,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168519751] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 19:07:42,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905104791] [2023-11-22 19:07:42,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 19:07:42,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 19:07:42,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 19:07:42,980 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) [2023-11-22 19:07:42,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-22 19:07:43,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 19:07:43,028 INFO L262 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-22 19:07:43,029 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 19:07:43,104 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-22 19:07:43,105 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 19:07:43,262 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-22 19:07:43,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905104791] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 19:07:43,262 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 19:07:43,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2023-11-22 19:07:43,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697960276] [2023-11-22 19:07:43,263 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 19:07:43,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-22 19:07:43,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 19:07:43,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-22 19:07:43,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2023-11-22 19:07:43,264 INFO L87 Difference]: Start difference. First operand 33 states and 41 transitions. Second operand has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 16 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 19:07:44,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 19:07:44,274 INFO L93 Difference]: Finished difference Result 185 states and 242 transitions. [2023-11-22 19:07:44,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-11-22 19:07:44,276 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 16 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2023-11-22 19:07:44,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 19:07:44,279 INFO L225 Difference]: With dead ends: 185 [2023-11-22 19:07:44,279 INFO L226 Difference]: Without dead ends: 110 [2023-11-22 19:07:44,280 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 611 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=509, Invalid=1843, Unknown=0, NotChecked=0, Total=2352 [2023-11-22 19:07:44,281 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 459 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 459 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-22 19:07:44,281 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [459 Valid, 41 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-22 19:07:44,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2023-11-22 19:07:44,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 70. [2023-11-22 19:07:44,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.2318840579710144) internal successors, (85), 69 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 19:07:44,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 85 transitions. [2023-11-22 19:07:44,307 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 85 transitions. Word has length 26 [2023-11-22 19:07:44,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 19:07:44,307 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 85 transitions. [2023-11-22 19:07:44,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 16 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 19:07:44,307 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 85 transitions. [2023-11-22 19:07:44,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-11-22 19:07:44,309 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 19:07:44,309 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2023-11-22 19:07:44,338 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-22 19:07:44,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 19:07:44,520 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 19:07:44,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 19:07:44,521 INFO L85 PathProgramCache]: Analyzing trace with hash -173694039, now seen corresponding path program 2 times [2023-11-22 19:07:44,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 19:07:44,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233440623] [2023-11-22 19:07:44,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 19:07:44,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 19:07:44,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 19:07:44,757 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 12 proven. 45 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-22 19:07:44,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 19:07:44,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233440623] [2023-11-22 19:07:44,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233440623] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 19:07:44,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260661105] [2023-11-22 19:07:44,758 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-22 19:07:44,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 19:07:44,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 19:07:44,759 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) [2023-11-22 19:07:44,808 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-22 19:07:44,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 19:07:44,809 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-22 19:07:44,809 INFO L262 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-22 19:07:44,813 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 19:07:44,894 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2023-11-22 19:07:44,895 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-22 19:07:44,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260661105] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 19:07:44,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-22 19:07:44,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2023-11-22 19:07:44,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793412881] [2023-11-22 19:07:44,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 19:07:44,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-22 19:07:44,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 19:07:44,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-22 19:07:44,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-11-22 19:07:44,897 INFO L87 Difference]: Start difference. First operand 70 states and 85 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 19:07:44,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 19:07:44,928 INFO L93 Difference]: Finished difference Result 72 states and 86 transitions. [2023-11-22 19:07:44,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-22 19:07:44,928 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2023-11-22 19:07:44,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 19:07:44,929 INFO L225 Difference]: With dead ends: 72 [2023-11-22 19:07:44,929 INFO L226 Difference]: Without dead ends: 70 [2023-11-22 19:07:44,930 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-11-22 19:07:44,930 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 7 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-22 19:07:44,931 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 10 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-22 19:07:44,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2023-11-22 19:07:44,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2023-11-22 19:07:44,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.2205882352941178) internal successors, (83), 68 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 19:07:44,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 83 transitions. [2023-11-22 19:07:44,950 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 83 transitions. Word has length 47 [2023-11-22 19:07:44,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 19:07:44,950 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 83 transitions. [2023-11-22 19:07:44,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 19:07:44,950 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 83 transitions. [2023-11-22 19:07:44,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-11-22 19:07:44,951 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 19:07:44,951 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1] [2023-11-22 19:07:44,975 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-22 19:07:45,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 19:07:45,164 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 19:07:45,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 19:07:45,165 INFO L85 PathProgramCache]: Analyzing trace with hash 915111332, now seen corresponding path program 3 times [2023-11-22 19:07:45,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 19:07:45,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481267822] [2023-11-22 19:07:45,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 19:07:45,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 19:07:45,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 19:07:45,425 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 17 proven. 64 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2023-11-22 19:07:45,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 19:07:45,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481267822] [2023-11-22 19:07:45,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481267822] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 19:07:45,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954408966] [2023-11-22 19:07:45,426 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-22 19:07:45,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 19:07:45,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 19:07:45,427 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) [2023-11-22 19:07:45,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-22 19:07:45,472 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-11-22 19:07:45,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 19:07:45,472 INFO L262 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-22 19:07:45,473 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 19:07:45,562 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2023-11-22 19:07:45,562 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-22 19:07:45,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954408966] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 19:07:45,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-22 19:07:45,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2023-11-22 19:07:45,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676147600] [2023-11-22 19:07:45,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 19:07:45,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-22 19:07:45,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 19:07:45,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-22 19:07:45,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-11-22 19:07:45,564 INFO L87 Difference]: Start difference. First operand 69 states and 83 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 19:07:45,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 19:07:45,597 INFO L93 Difference]: Finished difference Result 104 states and 122 transitions. [2023-11-22 19:07:45,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-22 19:07:45,597 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2023-11-22 19:07:45,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 19:07:45,599 INFO L225 Difference]: With dead ends: 104 [2023-11-22 19:07:45,599 INFO L226 Difference]: Without dead ends: 102 [2023-11-22 19:07:45,599 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-11-22 19:07:45,600 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 3 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-22 19:07:45,601 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 10 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-22 19:07:45,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2023-11-22 19:07:45,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 76. [2023-11-22 19:07:45,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.2133333333333334) internal successors, (91), 75 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 19:07:45,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 91 transitions. [2023-11-22 19:07:45,619 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 91 transitions. Word has length 62 [2023-11-22 19:07:45,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 19:07:45,620 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 91 transitions. [2023-11-22 19:07:45,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 19:07:45,620 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 91 transitions. [2023-11-22 19:07:45,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-11-22 19:07:45,621 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 19:07:45,621 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 5, 4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1] [2023-11-22 19:07:45,647 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-22 19:07:45,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 19:07:45,848 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 19:07:45,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 19:07:45,849 INFO L85 PathProgramCache]: Analyzing trace with hash -1461750529, now seen corresponding path program 4 times [2023-11-22 19:07:45,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 19:07:45,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033775925] [2023-11-22 19:07:45,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 19:07:45,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 19:07:45,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 19:07:46,302 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 18 proven. 83 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2023-11-22 19:07:46,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 19:07:46,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033775925] [2023-11-22 19:07:46,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033775925] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 19:07:46,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330103921] [2023-11-22 19:07:46,303 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-22 19:07:46,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 19:07:46,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 19:07:46,304 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) [2023-11-22 19:07:46,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-22 19:07:46,381 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-22 19:07:46,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 19:07:46,383 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-22 19:07:46,390 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 19:07:46,519 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 86 proven. 71 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2023-11-22 19:07:46,519 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 19:07:46,682 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 28 proven. 129 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2023-11-22 19:07:46,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330103921] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 19:07:46,683 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 19:07:46,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 21 [2023-11-22 19:07:46,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229161099] [2023-11-22 19:07:46,685 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 19:07:46,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-22 19:07:46,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 19:07:46,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-22 19:07:46,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2023-11-22 19:07:46,686 INFO L87 Difference]: Start difference. First operand 76 states and 91 transitions. Second operand has 21 states, 21 states have (on average 3.9047619047619047) internal successors, (82), 21 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 19:07:47,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 19:07:47,002 INFO L93 Difference]: Finished difference Result 240 states and 302 transitions. [2023-11-22 19:07:47,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-22 19:07:47,003 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.9047619047619047) internal successors, (82), 21 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2023-11-22 19:07:47,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 19:07:47,003 INFO L225 Difference]: With dead ends: 240 [2023-11-22 19:07:47,003 INFO L226 Difference]: Without dead ends: 116 [2023-11-22 19:07:47,006 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 128 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=158, Invalid=712, Unknown=0, NotChecked=0, Total=870 [2023-11-22 19:07:47,008 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 81 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-22 19:07:47,008 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 60 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-22 19:07:47,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2023-11-22 19:07:47,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 106. [2023-11-22 19:07:47,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 1.1523809523809523) internal successors, (121), 105 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 19:07:47,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 121 transitions. [2023-11-22 19:07:47,026 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 121 transitions. Word has length 71 [2023-11-22 19:07:47,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 19:07:47,027 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 121 transitions. [2023-11-22 19:07:47,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.9047619047619047) internal successors, (82), 21 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 19:07:47,027 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 121 transitions. [2023-11-22 19:07:47,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2023-11-22 19:07:47,031 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 19:07:47,031 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 5, 4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1] [2023-11-22 19:07:47,050 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-22 19:07:47,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 19:07:47,244 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 19:07:47,244 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 19:07:47,244 INFO L85 PathProgramCache]: Analyzing trace with hash -1787036673, now seen corresponding path program 5 times [2023-11-22 19:07:47,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 19:07:47,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100491105] [2023-11-22 19:07:47,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 19:07:47,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 19:07:47,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 19:07:47,644 INFO L134 CoverageAnalysis]: Checked inductivity of 772 backedges. 18 proven. 270 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2023-11-22 19:07:47,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 19:07:47,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100491105] [2023-11-22 19:07:47,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100491105] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 19:07:47,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849233826] [2023-11-22 19:07:47,645 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-22 19:07:47,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 19:07:47,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 19:07:47,646 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) [2023-11-22 19:07:47,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-22 19:07:47,829 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2023-11-22 19:07:47,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 19:07:47,831 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-22 19:07:47,833 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 19:07:47,947 INFO L134 CoverageAnalysis]: Checked inductivity of 772 backedges. 426 proven. 84 refuted. 0 times theorem prover too weak. 262 trivial. 0 not checked. [2023-11-22 19:07:47,947 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 19:07:48,093 INFO L134 CoverageAnalysis]: Checked inductivity of 772 backedges. 408 proven. 102 refuted. 0 times theorem prover too weak. 262 trivial. 0 not checked. [2023-11-22 19:07:48,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849233826] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 19:07:48,093 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 19:07:48,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 19 [2023-11-22 19:07:48,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172831985] [2023-11-22 19:07:48,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 19:07:48,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-22 19:07:48,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 19:07:48,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-22 19:07:48,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2023-11-22 19:07:48,095 INFO L87 Difference]: Start difference. First operand 106 states and 121 transitions. Second operand has 19 states, 19 states have (on average 4.894736842105263) internal successors, (93), 19 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 19:07:48,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 19:07:48,879 INFO L93 Difference]: Finished difference Result 445 states and 527 transitions. [2023-11-22 19:07:48,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-22 19:07:48,879 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.894736842105263) internal successors, (93), 19 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2023-11-22 19:07:48,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 19:07:48,880 INFO L225 Difference]: With dead ends: 445 [2023-11-22 19:07:48,880 INFO L226 Difference]: Without dead ends: 269 [2023-11-22 19:07:48,881 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 193 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=308, Invalid=1584, Unknown=0, NotChecked=0, Total=1892 [2023-11-22 19:07:48,882 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 153 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 401 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-22 19:07:48,882 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 50 Invalid, 434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 401 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-22 19:07:48,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2023-11-22 19:07:48,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 193. [2023-11-22 19:07:48,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 1.1041666666666667) internal successors, (212), 192 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 19:07:48,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 212 transitions. [2023-11-22 19:07:48,908 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 212 transitions. Word has length 101 [2023-11-22 19:07:48,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 19:07:48,908 INFO L495 AbstractCegarLoop]: Abstraction has 193 states and 212 transitions. [2023-11-22 19:07:48,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.894736842105263) internal successors, (93), 19 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 19:07:48,909 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 212 transitions. [2023-11-22 19:07:48,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2023-11-22 19:07:48,910 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 19:07:48,910 INFO L195 NwaCegarLoop]: trace histogram [46, 45, 45, 9, 8, 8, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1] [2023-11-22 19:07:48,931 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-22 19:07:49,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-22 19:07:49,116 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 19:07:49,116 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 19:07:49,117 INFO L85 PathProgramCache]: Analyzing trace with hash -1270388469, now seen corresponding path program 6 times [2023-11-22 19:07:49,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 19:07:49,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084165555] [2023-11-22 19:07:49,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 19:07:49,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 19:07:49,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 19:07:49,719 INFO L134 CoverageAnalysis]: Checked inductivity of 3588 backedges. 22 proven. 768 refuted. 0 times theorem prover too weak. 2798 trivial. 0 not checked. [2023-11-22 19:07:49,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 19:07:49,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084165555] [2023-11-22 19:07:49,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084165555] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 19:07:49,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354304011] [2023-11-22 19:07:49,720 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-22 19:07:49,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 19:07:49,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 19:07:49,733 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) [2023-11-22 19:07:49,762 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-22 19:07:49,772 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2023-11-22 19:07:49,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 19:07:49,773 INFO L262 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-22 19:07:49,775 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 19:07:50,033 INFO L134 CoverageAnalysis]: Checked inductivity of 3588 backedges. 1623 proven. 0 refuted. 0 times theorem prover too weak. 1965 trivial. 0 not checked. [2023-11-22 19:07:50,034 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-22 19:07:50,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354304011] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 19:07:50,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-22 19:07:50,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [10] total 12 [2023-11-22 19:07:50,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365947421] [2023-11-22 19:07:50,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 19:07:50,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-22 19:07:50,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 19:07:50,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-22 19:07:50,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2023-11-22 19:07:50,035 INFO L87 Difference]: Start difference. First operand 193 states and 212 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 19:07:50,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 19:07:50,097 INFO L93 Difference]: Finished difference Result 364 states and 396 transitions. [2023-11-22 19:07:50,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-22 19:07:50,097 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 188 [2023-11-22 19:07:50,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 19:07:50,099 INFO L225 Difference]: With dead ends: 364 [2023-11-22 19:07:50,099 INFO L226 Difference]: Without dead ends: 362 [2023-11-22 19:07:50,099 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2023-11-22 19:07:50,099 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 3 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-22 19:07:50,100 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 10 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-22 19:07:50,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2023-11-22 19:07:50,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 230. [2023-11-22 19:07:50,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 1.1004366812227073) internal successors, (252), 229 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 19:07:50,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 252 transitions. [2023-11-22 19:07:50,154 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 252 transitions. Word has length 188 [2023-11-22 19:07:50,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 19:07:50,154 INFO L495 AbstractCegarLoop]: Abstraction has 230 states and 252 transitions. [2023-11-22 19:07:50,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 19:07:50,155 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 252 transitions. [2023-11-22 19:07:50,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2023-11-22 19:07:50,156 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 19:07:50,156 INFO L195 NwaCegarLoop]: trace histogram [56, 55, 55, 11, 10, 10, 5, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1] [2023-11-22 19:07:50,180 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-22 19:07:50,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 19:07:50,368 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 19:07:50,368 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 19:07:50,368 INFO L85 PathProgramCache]: Analyzing trace with hash -576649274, now seen corresponding path program 7 times [2023-11-22 19:07:50,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 19:07:50,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056592209] [2023-11-22 19:07:50,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 19:07:50,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 19:07:50,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 19:07:51,121 INFO L134 CoverageAnalysis]: Checked inductivity of 5368 backedges. 26 proven. 950 refuted. 0 times theorem prover too weak. 4392 trivial. 0 not checked. [2023-11-22 19:07:51,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 19:07:51,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056592209] [2023-11-22 19:07:51,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056592209] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 19:07:51,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038217866] [2023-11-22 19:07:51,123 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-22 19:07:51,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 19:07:51,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 19:07:51,136 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) [2023-11-22 19:07:51,146 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-22 19:07:51,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 19:07:51,234 INFO L262 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-22 19:07:51,237 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 19:07:51,405 INFO L134 CoverageAnalysis]: Checked inductivity of 5368 backedges. 1622 proven. 116 refuted. 0 times theorem prover too weak. 3630 trivial. 0 not checked. [2023-11-22 19:07:51,405 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 19:07:51,600 INFO L134 CoverageAnalysis]: Checked inductivity of 5368 backedges. 1622 proven. 116 refuted. 0 times theorem prover too weak. 3630 trivial. 0 not checked. [2023-11-22 19:07:51,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038217866] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 19:07:51,601 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 19:07:51,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 25 [2023-11-22 19:07:51,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598191101] [2023-11-22 19:07:51,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 19:07:51,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-22 19:07:51,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 19:07:51,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-22 19:07:51,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2023-11-22 19:07:51,602 INFO L87 Difference]: Start difference. First operand 230 states and 252 transitions. Second operand has 25 states, 25 states have (on average 4.0) internal successors, (100), 25 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 19:07:54,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 19:07:54,312 INFO L93 Difference]: Finished difference Result 1129 states and 1324 transitions. [2023-11-22 19:07:54,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2023-11-22 19:07:54,312 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.0) internal successors, (100), 25 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 227 [2023-11-22 19:07:54,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 19:07:54,316 INFO L225 Difference]: With dead ends: 1129 [2023-11-22 19:07:54,317 INFO L226 Difference]: Without dead ends: 903 [2023-11-22 19:07:54,319 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 526 GetRequests, 440 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2392 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1267, Invalid=6389, Unknown=0, NotChecked=0, Total=7656 [2023-11-22 19:07:54,319 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 399 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 816 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 399 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 918 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 816 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-22 19:07:54,319 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [399 Valid, 67 Invalid, 918 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 816 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-22 19:07:54,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 903 states. [2023-11-22 19:07:54,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 903 to 799. [2023-11-22 19:07:54,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 799 states, 798 states have (on average 1.0526315789473684) internal successors, (840), 798 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 19:07:54,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 799 states to 799 states and 840 transitions. [2023-11-22 19:07:54,425 INFO L78 Accepts]: Start accepts. Automaton has 799 states and 840 transitions. Word has length 227 [2023-11-22 19:07:54,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 19:07:54,425 INFO L495 AbstractCegarLoop]: Abstraction has 799 states and 840 transitions. [2023-11-22 19:07:54,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.0) internal successors, (100), 25 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 19:07:54,426 INFO L276 IsEmpty]: Start isEmpty. Operand 799 states and 840 transitions. [2023-11-22 19:07:54,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 795 [2023-11-22 19:07:54,435 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 19:07:54,435 INFO L195 NwaCegarLoop]: trace histogram [226, 225, 225, 30, 29, 29, 5, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1] [2023-11-22 19:07:54,448 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-22 19:07:54,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-22 19:07:54,650 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 19:07:54,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 19:07:54,650 INFO L85 PathProgramCache]: Analyzing trace with hash -1105811065, now seen corresponding path program 8 times [2023-11-22 19:07:54,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 19:07:54,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930613930] [2023-11-22 19:07:54,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 19:07:54,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 19:07:55,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 19:07:57,508 INFO L134 CoverageAnalysis]: Checked inductivity of 84025 backedges. 45 proven. 6003 refuted. 0 times theorem prover too weak. 77977 trivial. 0 not checked. [2023-11-22 19:07:57,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 19:07:57,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930613930] [2023-11-22 19:07:57,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930613930] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 19:07:57,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206570456] [2023-11-22 19:07:57,509 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-22 19:07:57,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 19:07:57,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 19:07:57,524 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) [2023-11-22 19:07:57,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-22 19:07:57,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-22 19:07:57,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 19:07:57,797 INFO L262 TraceCheckSpWp]: Trace formula consists of 1171 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-22 19:07:57,803 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 19:07:58,240 INFO L134 CoverageAnalysis]: Checked inductivity of 84025 backedges. 20384 proven. 670 refuted. 0 times theorem prover too weak. 62971 trivial. 0 not checked. [2023-11-22 19:07:58,240 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 19:07:58,842 INFO L134 CoverageAnalysis]: Checked inductivity of 84025 backedges. 19972 proven. 1082 refuted. 0 times theorem prover too weak. 62971 trivial. 0 not checked. [2023-11-22 19:07:58,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206570456] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 19:07:58,843 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 19:07:58,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19, 19] total 47 [2023-11-22 19:07:58,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402764787] [2023-11-22 19:07:58,844 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 19:07:58,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-11-22 19:07:58,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 19:07:58,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-11-22 19:07:58,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=1892, Unknown=0, NotChecked=0, Total=2162 [2023-11-22 19:07:58,850 INFO L87 Difference]: Start difference. First operand 799 states and 840 transitions. Second operand has 47 states, 47 states have (on average 3.5319148936170213) internal successors, (166), 47 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 19:08:02,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 19:08:02,232 INFO L93 Difference]: Finished difference Result 2539 states and 2946 transitions. [2023-11-22 19:08:02,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-22 19:08:02,232 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 3.5319148936170213) internal successors, (166), 47 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 794 [2023-11-22 19:08:02,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 19:08:02,238 INFO L225 Difference]: With dead ends: 2539 [2023-11-22 19:08:02,238 INFO L226 Difference]: Without dead ends: 1744 [2023-11-22 19:08:02,240 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1623 GetRequests, 1555 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1056 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=726, Invalid=3966, Unknown=0, NotChecked=0, Total=4692 [2023-11-22 19:08:02,240 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 204 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 772 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 815 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 772 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-22 19:08:02,241 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [204 Valid, 109 Invalid, 815 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 772 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-22 19:08:02,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1744 states. [2023-11-22 19:08:02,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1744 to 1743. [2023-11-22 19:08:02,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1743 states, 1742 states have (on average 1.024110218140069) internal successors, (1784), 1742 states have internal predecessors, (1784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 19:08:02,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1743 states to 1743 states and 1784 transitions. [2023-11-22 19:08:02,548 INFO L78 Accepts]: Start accepts. Automaton has 1743 states and 1784 transitions. Word has length 794 [2023-11-22 19:08:02,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 19:08:02,548 INFO L495 AbstractCegarLoop]: Abstraction has 1743 states and 1784 transitions. [2023-11-22 19:08:02,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 3.5319148936170213) internal successors, (166), 47 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 19:08:02,549 INFO L276 IsEmpty]: Start isEmpty. Operand 1743 states and 1784 transitions. [2023-11-22 19:08:02,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1737 [2023-11-22 19:08:02,584 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 19:08:02,584 INFO L195 NwaCegarLoop]: trace histogram [540, 539, 539, 30, 29, 29, 5, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1] [2023-11-22 19:08:02,604 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-22 19:08:02,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-22 19:08:02,803 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 19:08:02,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 19:08:02,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1642398375, now seen corresponding path program 9 times [2023-11-22 19:08:02,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 19:08:02,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059922457] [2023-11-22 19:08:02,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 19:08:02,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 19:08:04,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 19:08:11,277 INFO L134 CoverageAnalysis]: Checked inductivity of 453132 backedges. 45 proven. 30222 refuted. 0 times theorem prover too weak. 422865 trivial. 0 not checked. [2023-11-22 19:08:11,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 19:08:11,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059922457] [2023-11-22 19:08:11,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059922457] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 19:08:11,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562631674] [2023-11-22 19:08:11,278 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-22 19:08:11,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 19:08:11,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 19:08:11,279 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) [2023-11-22 19:08:11,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-22 19:08:11,468 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-22 19:08:11,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 19:08:11,470 INFO L262 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-22 19:08:11,485 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 19:08:13,777 INFO L134 CoverageAnalysis]: Checked inductivity of 453132 backedges. 217764 proven. 36175 refuted. 0 times theorem prover too weak. 199193 trivial. 0 not checked. [2023-11-22 19:08:13,777 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 19:08:15,840 INFO L134 CoverageAnalysis]: Checked inductivity of 453132 backedges. 0 proven. 253939 refuted. 0 times theorem prover too weak. 199193 trivial. 0 not checked. [2023-11-22 19:08:15,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562631674] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 19:08:15,840 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 19:08:15,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 4, 4] total 29 [2023-11-22 19:08:15,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023796921] [2023-11-22 19:08:15,841 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 19:08:15,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-22 19:08:15,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 19:08:15,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-22 19:08:15,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=742, Unknown=0, NotChecked=0, Total=870 [2023-11-22 19:08:15,844 INFO L87 Difference]: Start difference. First operand 1743 states and 1784 transitions. Second operand has 30 states, 30 states have (on average 4.866666666666666) internal successors, (146), 29 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 19:08:20,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 19:08:20,163 INFO L93 Difference]: Finished difference Result 9615 states and 10069 transitions. [2023-11-22 19:08:20,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2023-11-22 19:08:20,164 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 4.866666666666666) internal successors, (146), 29 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1736 [2023-11-22 19:08:20,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 19:08:20,183 INFO L225 Difference]: With dead ends: 9615 [2023-11-22 19:08:20,183 INFO L226 Difference]: Without dead ends: 7876 [2023-11-22 19:08:20,189 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3597 GetRequests, 3466 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5503 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2018, Invalid=15538, Unknown=0, NotChecked=0, Total=17556 [2023-11-22 19:08:20,190 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 229 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 2693 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 2809 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 2693 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-22 19:08:20,190 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [229 Valid, 115 Invalid, 2809 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 2693 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-22 19:08:20,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7876 states. [2023-11-22 19:08:20,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7876 to 4210. [2023-11-22 19:08:20,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4210 states, 4209 states have (on average 1.020432406747446) internal successors, (4295), 4209 states have internal predecessors, (4295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 19:08:20,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4210 states to 4210 states and 4295 transitions. [2023-11-22 19:08:20,809 INFO L78 Accepts]: Start accepts. Automaton has 4210 states and 4295 transitions. Word has length 1736 [2023-11-22 19:08:20,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 19:08:20,809 INFO L495 AbstractCegarLoop]: Abstraction has 4210 states and 4295 transitions. [2023-11-22 19:08:20,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 4.866666666666666) internal successors, (146), 29 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 19:08:20,810 INFO L276 IsEmpty]: Start isEmpty. Operand 4210 states and 4295 transitions. [2023-11-22 19:08:20,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4206 [2023-11-22 19:08:20,878 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 19:08:20,879 INFO L195 NwaCegarLoop]: trace histogram [1321, 1320, 1320, 66, 65, 65, 11, 10, 10, 4, 3, 3, 2, 1, 1, 1, 1, 1] [2023-11-22 19:08:20,905 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-22 19:08:21,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-22 19:08:21,091 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 19:08:21,091 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 19:08:21,092 INFO L85 PathProgramCache]: Analyzing trace with hash -2099426159, now seen corresponding path program 10 times [2023-11-22 19:08:21,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 19:08:21,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432144009] [2023-11-22 19:08:21,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 19:08:21,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 19:08:34,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 19:08:52,337 INFO L134 CoverageAnalysis]: Checked inductivity of 2707285 backedges. 93 proven. 82575 refuted. 0 times theorem prover too weak. 2624617 trivial. 0 not checked. [2023-11-22 19:08:52,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 19:08:52,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432144009] [2023-11-22 19:08:52,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432144009] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 19:08:52,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705548795] [2023-11-22 19:08:52,338 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-22 19:08:52,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 19:08:52,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 19:08:52,339 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) [2023-11-22 19:08:52,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-22 19:08:53,583 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-22 19:08:53,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 19:08:53,624 INFO L262 TraceCheckSpWp]: Trace formula consists of 5803 conjuncts, 87 conjunts are in the unsatisfiable core [2023-11-22 19:08:53,658 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 19:08:59,038 INFO L134 CoverageAnalysis]: Checked inductivity of 2707285 backedges. 154 proven. 162528 refuted. 0 times theorem prover too weak. 2544603 trivial. 0 not checked. [2023-11-22 19:08:59,038 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 19:09:06,613 INFO L134 CoverageAnalysis]: Checked inductivity of 2707285 backedges. 93 proven. 162589 refuted. 0 times theorem prover too weak. 2544603 trivial. 0 not checked. [2023-11-22 19:09:06,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705548795] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 19:09:06,613 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 19:09:06,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 45, 45] total 111 [2023-11-22 19:09:06,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115421937] [2023-11-22 19:09:06,615 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 19:09:06,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2023-11-22 19:09:06,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 19:09:06,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2023-11-22 19:09:06,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1168, Invalid=11042, Unknown=0, NotChecked=0, Total=12210 [2023-11-22 19:09:06,622 INFO L87 Difference]: Start difference. First operand 4210 states and 4295 transitions. Second operand has 111 states, 111 states have (on average 3.18018018018018) internal successors, (353), 111 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 19:09:10,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 19:09:10,919 INFO L93 Difference]: Finished difference Result 9203 states and 9544 transitions. [2023-11-22 19:09:10,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-22 19:09:10,919 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 111 states have (on average 3.18018018018018) internal successors, (353), 111 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4205 [2023-11-22 19:09:10,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 19:09:10,930 INFO L225 Difference]: With dead ends: 9203 [2023-11-22 19:09:10,930 INFO L226 Difference]: Without dead ends: 4737 [2023-11-22 19:09:10,937 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8459 GetRequests, 8324 SyntacticMatches, 1 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4857 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=1634, Invalid=16726, Unknown=0, NotChecked=0, Total=18360 [2023-11-22 19:09:10,937 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 124 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 4075 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 4127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 4075 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-11-22 19:09:10,938 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 223 Invalid, 4127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 4075 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-11-22 19:09:10,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4737 states. [2023-11-22 19:09:11,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4737 to 4606. [2023-11-22 19:09:11,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4606 states, 4605 states have (on average 1.0186753528773074) internal successors, (4691), 4605 states have internal predecessors, (4691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 19:09:11,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4606 states to 4606 states and 4691 transitions. [2023-11-22 19:09:11,567 INFO L78 Accepts]: Start accepts. Automaton has 4606 states and 4691 transitions. Word has length 4205 [2023-11-22 19:09:11,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 19:09:11,567 INFO L495 AbstractCegarLoop]: Abstraction has 4606 states and 4691 transitions. [2023-11-22 19:09:11,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 111 states have (on average 3.18018018018018) internal successors, (353), 111 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 19:09:11,568 INFO L276 IsEmpty]: Start isEmpty. Operand 4606 states and 4691 transitions. [2023-11-22 19:09:11,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4602 [2023-11-22 19:09:11,647 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 19:09:11,648 INFO L195 NwaCegarLoop]: trace histogram [1453, 1452, 1452, 66, 65, 65, 11, 10, 10, 4, 3, 3, 2, 1, 1, 1, 1, 1] [2023-11-22 19:09:11,676 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-22 19:09:11,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-22 19:09:11,876 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 19:09:11,876 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 19:09:11,877 INFO L85 PathProgramCache]: Analyzing trace with hash 947246673, now seen corresponding path program 11 times [2023-11-22 19:09:11,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 19:09:11,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025769581] [2023-11-22 19:09:11,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 19:09:11,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 19:09:29,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 19:09:49,876 INFO L134 CoverageAnalysis]: Checked inductivity of 3264787 backedges. 93 proven. 99472 refuted. 0 times theorem prover too weak. 3165222 trivial. 0 not checked. [2023-11-22 19:09:49,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 19:09:49,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025769581] [2023-11-22 19:09:49,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025769581] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 19:09:49,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013130072] [2023-11-22 19:09:49,877 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-22 19:09:49,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 19:09:49,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 19:09:49,878 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) [2023-11-22 19:09:49,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process Killed by 15