/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.use.bitabs.translation true -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/loops-crafted-1/in-de31.c -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-19 18:11:55,079 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-19 18:11:55,158 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-19 18:11:55,163 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-19 18:11:55,163 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-19 18:11:55,184 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-19 18:11:55,184 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-19 18:11:55,184 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-19 18:11:55,185 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-19 18:11:55,188 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-19 18:11:55,188 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-19 18:11:55,188 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-19 18:11:55,189 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-19 18:11:55,190 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-19 18:11:55,190 INFO L153 SettingsManager]: * Use SBE=true [2023-12-19 18:11:55,190 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-19 18:11:55,190 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-19 18:11:55,190 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-19 18:11:55,190 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-19 18:11:55,191 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-19 18:11:55,191 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-19 18:11:55,192 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-19 18:11:55,192 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-19 18:11:55,192 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-19 18:11:55,192 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-19 18:11:55,192 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-19 18:11:55,193 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-19 18:11:55,193 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-19 18:11:55,193 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-19 18:11:55,193 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-19 18:11:55,194 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-19 18:11:55,194 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-19 18:11:55,194 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-19 18:11:55,194 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-19 18:11:55,194 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-19 18:11:55,195 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-19 18:11:55,195 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-19 18:11:55,195 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-19 18:11:55,195 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-19 18:11:55,195 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-19 18:11:55,195 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-19 18:11:55,195 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-19 18:11:55,195 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-19 18:11:55,195 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> true [2023-12-19 18:11:55,381 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-19 18:11:55,396 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-19 18:11:55,398 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-19 18:11:55,398 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-19 18:11:55,400 INFO L274 PluginConnector]: CDTParser initialized [2023-12-19 18:11:55,401 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/in-de31.c [2023-12-19 18:11:56,374 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-19 18:11:56,514 INFO L384 CDTParser]: Found 1 translation units. [2023-12-19 18:11:56,515 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/in-de31.c [2023-12-19 18:11:56,529 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5e2e9362c/e7fb191dbb8948c7b4034ee724e2a858/FLAGac496f2da [2023-12-19 18:11:56,563 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5e2e9362c/e7fb191dbb8948c7b4034ee724e2a858 [2023-12-19 18:11:56,565 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-19 18:11:56,566 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-19 18:11:56,569 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-19 18:11:56,570 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-19 18:11:56,583 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-19 18:11:56,583 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.12 06:11:56" (1/1) ... [2023-12-19 18:11:56,584 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a522299 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 06:11:56, skipping insertion in model container [2023-12-19 18:11:56,584 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.12 06:11:56" (1/1) ... [2023-12-19 18:11:56,604 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-19 18:11:56,702 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/in-de31.c[368,381] [2023-12-19 18:11:56,710 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-19 18:11:56,715 INFO L202 MainTranslator]: Completed pre-run [2023-12-19 18:11:56,723 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/in-de31.c[368,381] [2023-12-19 18:11:56,725 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-19 18:11:56,733 INFO L206 MainTranslator]: Completed translation [2023-12-19 18:11:56,734 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 06:11:56 WrapperNode [2023-12-19 18:11:56,734 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-19 18:11:56,735 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-19 18:11:56,735 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-19 18:11:56,735 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-19 18:11:56,739 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 06:11:56" (1/1) ... [2023-12-19 18:11:56,742 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 06:11:56" (1/1) ... [2023-12-19 18:11:56,752 INFO L138 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 55 [2023-12-19 18:11:56,752 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-19 18:11:56,753 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-19 18:11:56,753 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-19 18:11:56,753 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-19 18:11:56,759 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 06:11:56" (1/1) ... [2023-12-19 18:11:56,759 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 06:11:56" (1/1) ... [2023-12-19 18:11:56,760 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 06:11:56" (1/1) ... [2023-12-19 18:11:56,766 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2023-12-19 18:11:56,766 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 06:11:56" (1/1) ... [2023-12-19 18:11:56,766 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 06:11:56" (1/1) ... [2023-12-19 18:11:56,768 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 06:11:56" (1/1) ... [2023-12-19 18:11:56,769 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 06:11:56" (1/1) ... [2023-12-19 18:11:56,770 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 06:11:56" (1/1) ... [2023-12-19 18:11:56,770 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 06:11:56" (1/1) ... [2023-12-19 18:11:56,771 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-19 18:11:56,772 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-19 18:11:56,772 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-19 18:11:56,772 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-19 18:11:56,773 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 06:11:56" (1/1) ... [2023-12-19 18:11:56,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-19 18:11:56,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:11:56,801 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-12-19 18:11:56,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-12-19 18:11:56,870 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-19 18:11:56,870 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-19 18:11:56,870 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-19 18:11:56,870 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-19 18:11:56,917 INFO L241 CfgBuilder]: Building ICFG [2023-12-19 18:11:56,919 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-19 18:11:57,050 INFO L282 CfgBuilder]: Performing block encoding [2023-12-19 18:11:57,069 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-19 18:11:57,070 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-12-19 18:11:57,070 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.12 06:11:57 BoogieIcfgContainer [2023-12-19 18:11:57,070 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-19 18:11:57,072 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-19 18:11:57,072 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-19 18:11:57,077 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-19 18:11:57,078 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.12 06:11:56" (1/3) ... [2023-12-19 18:11:57,078 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@386f4658 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.12 06:11:57, skipping insertion in model container [2023-12-19 18:11:57,078 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 06:11:56" (2/3) ... [2023-12-19 18:11:57,079 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@386f4658 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.12 06:11:57, skipping insertion in model container [2023-12-19 18:11:57,079 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.12 06:11:57" (3/3) ... [2023-12-19 18:11:57,080 INFO L112 eAbstractionObserver]: Analyzing ICFG in-de31.c [2023-12-19 18:11:57,093 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-19 18:11:57,093 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-19 18:11:57,131 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-19 18:11:57,136 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;@72b3b6f3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-19 18:11:57,136 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-19 18:11:57,139 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 10 states have internal predecessors, (17), 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) [2023-12-19 18:11:57,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-12-19 18:11:57,144 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:11:57,145 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:11:57,146 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:11:57,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:11:57,152 INFO L85 PathProgramCache]: Analyzing trace with hash -593791358, now seen corresponding path program 1 times [2023-12-19 18:11:57,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:11:57,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765336388] [2023-12-19 18:11:57,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:11:57,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:11:57,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:11:57,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 18:11:57,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:11:57,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765336388] [2023-12-19 18:11:57,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765336388] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 18:11:57,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 18:11:57,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-19 18:11:57,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507790392] [2023-12-19 18:11:57,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 18:11:57,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-19 18:11:57,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:11:57,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-19 18:11:57,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-19 18:11:57,700 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 10 states have internal predecessors, (17), 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 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 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) [2023-12-19 18:11:57,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:11:57,823 INFO L93 Difference]: Finished difference Result 27 states and 44 transitions. [2023-12-19 18:11:57,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-19 18:11:57,825 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 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 [2023-12-19 18:11:57,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:11:57,830 INFO L225 Difference]: With dead ends: 27 [2023-12-19 18:11:57,830 INFO L226 Difference]: Without dead ends: 10 [2023-12-19 18:11:57,832 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-12-19 18:11:57,836 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 14 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 18:11:57,837 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 21 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 18:11:57,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2023-12-19 18:11:57,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2023-12-19 18:11:57,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 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) [2023-12-19 18:11:57,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2023-12-19 18:11:57,857 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 8 [2023-12-19 18:11:57,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:11:57,857 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2023-12-19 18:11:57,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 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) [2023-12-19 18:11:57,859 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2023-12-19 18:11:57,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-12-19 18:11:57,859 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:11:57,859 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:11:57,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-19 18:11:57,860 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:11:57,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:11:57,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1017158531, now seen corresponding path program 1 times [2023-12-19 18:11:57,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:11:57,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297214506] [2023-12-19 18:11:57,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:11:57,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:11:57,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:11:57,981 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 18:11:57,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:11:57,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297214506] [2023-12-19 18:11:57,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297214506] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 18:11:57,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615687377] [2023-12-19 18:11:57,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:11:57,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:11:57,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:11:57,997 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) [2023-12-19 18:11:58,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-19 18:11:58,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:11:58,038 INFO L262 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-19 18:11:58,041 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 18:11:58,067 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 18:11:58,067 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 18:11:58,098 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 18:11:58,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615687377] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 18:11:58,099 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 18:11:58,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2023-12-19 18:11:58,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782854716] [2023-12-19 18:11:58,100 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 18:11:58,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-19 18:11:58,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:11:58,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-19 18:11:58,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-12-19 18:11:58,101 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 8 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) [2023-12-19 18:11:58,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:11:58,171 INFO L93 Difference]: Finished difference Result 36 states and 51 transitions. [2023-12-19 18:11:58,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-19 18:11:58,171 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 8 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 9 [2023-12-19 18:11:58,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:11:58,173 INFO L225 Difference]: With dead ends: 36 [2023-12-19 18:11:58,173 INFO L226 Difference]: Without dead ends: 31 [2023-12-19 18:11:58,173 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2023-12-19 18:11:58,174 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 29 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 18:11:58,175 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 23 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 18:11:58,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-12-19 18:11:58,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 22. [2023-12-19 18:11:58,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 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) [2023-12-19 18:11:58,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 29 transitions. [2023-12-19 18:11:58,180 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 29 transitions. Word has length 9 [2023-12-19 18:11:58,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:11:58,180 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 29 transitions. [2023-12-19 18:11:58,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 8 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) [2023-12-19 18:11:58,180 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 29 transitions. [2023-12-19 18:11:58,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-12-19 18:11:58,180 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:11:58,181 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:11:58,187 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-19 18:11:58,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:11:58,386 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:11:58,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:11:58,387 INFO L85 PathProgramCache]: Analyzing trace with hash -307074158, now seen corresponding path program 1 times [2023-12-19 18:11:58,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:11:58,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250537624] [2023-12-19 18:11:58,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:11:58,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:11:58,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:11:58,781 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 18:11:58,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:11:58,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250537624] [2023-12-19 18:11:58,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250537624] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 18:11:58,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205216801] [2023-12-19 18:11:58,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:11:58,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:11:58,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:11:58,802 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) [2023-12-19 18:11:58,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-19 18:11:58,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:11:58,846 INFO L262 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 23 conjunts are in the unsatisfiable core [2023-12-19 18:11:58,847 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 18:11:58,977 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 18:11:58,978 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 18:11:59,122 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 18:11:59,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205216801] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 18:11:59,123 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 18:11:59,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 18 [2023-12-19 18:11:59,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355708599] [2023-12-19 18:11:59,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 18:11:59,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-12-19 18:11:59,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:11:59,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-12-19 18:11:59,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2023-12-19 18:11:59,125 INFO L87 Difference]: Start difference. First operand 22 states and 29 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 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) [2023-12-19 18:11:59,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:11:59,847 INFO L93 Difference]: Finished difference Result 58 states and 70 transitions. [2023-12-19 18:11:59,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-12-19 18:11:59,848 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 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 [2023-12-19 18:11:59,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:11:59,848 INFO L225 Difference]: With dead ends: 58 [2023-12-19 18:11:59,848 INFO L226 Difference]: Without dead ends: 42 [2023-12-19 18:11:59,849 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=276, Invalid=1130, Unknown=0, NotChecked=0, Total=1406 [2023-12-19 18:11:59,850 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 79 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-19 18:11:59,850 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 29 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-19 18:11:59,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2023-12-19 18:11:59,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 19. [2023-12-19 18:11:59,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 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) [2023-12-19 18:11:59,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 25 transitions. [2023-12-19 18:11:59,857 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 25 transitions. Word has length 11 [2023-12-19 18:11:59,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:11:59,857 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 25 transitions. [2023-12-19 18:11:59,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 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) [2023-12-19 18:11:59,857 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 25 transitions. [2023-12-19 18:11:59,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-12-19 18:11:59,858 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:11:59,858 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:11:59,878 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-19 18:12:00,079 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,SelfDestructingSolverStorable2 [2023-12-19 18:12:00,081 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:12:00,081 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:12:00,082 INFO L85 PathProgramCache]: Analyzing trace with hash 1195192002, now seen corresponding path program 2 times [2023-12-19 18:12:00,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:12:00,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548815649] [2023-12-19 18:12:00,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:12:00,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:12:00,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:12:00,158 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 18:12:00,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:12:00,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548815649] [2023-12-19 18:12:00,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548815649] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 18:12:00,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279364501] [2023-12-19 18:12:00,162 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-19 18:12:00,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:12:00,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:12:00,163 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) [2023-12-19 18:12:00,195 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-19 18:12:00,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-19 18:12:00,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 18:12:00,200 INFO L262 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2023-12-19 18:12:00,201 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 18:12:00,214 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 18:12:00,214 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 18:12:00,270 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 18:12:00,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279364501] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 18:12:00,271 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 18:12:00,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-12-19 18:12:00,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554455125] [2023-12-19 18:12:00,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 18:12:00,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-12-19 18:12:00,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:12:00,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-12-19 18:12:00,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2023-12-19 18:12:00,273 INFO L87 Difference]: Start difference. First operand 19 states and 25 transitions. Second operand has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:12:00,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:12:00,687 INFO L93 Difference]: Finished difference Result 74 states and 114 transitions. [2023-12-19 18:12:00,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-12-19 18:12:00,687 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-12-19 18:12:00,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:12:00,688 INFO L225 Difference]: With dead ends: 74 [2023-12-19 18:12:00,688 INFO L226 Difference]: Without dead ends: 69 [2023-12-19 18:12:00,689 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=280, Invalid=650, Unknown=0, NotChecked=0, Total=930 [2023-12-19 18:12:00,690 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 156 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-19 18:12:00,690 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 64 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-19 18:12:00,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2023-12-19 18:12:00,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 38. [2023-12-19 18:12:00,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.4054054054054055) internal successors, (52), 37 states have internal predecessors, (52), 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) [2023-12-19 18:12:00,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 52 transitions. [2023-12-19 18:12:00,724 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 52 transitions. Word has length 12 [2023-12-19 18:12:00,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:12:00,724 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 52 transitions. [2023-12-19 18:12:00,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:12:00,724 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 52 transitions. [2023-12-19 18:12:00,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-12-19 18:12:00,725 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:12:00,725 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:12:00,751 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-19 18:12:00,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:12:00,935 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:12:00,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:12:00,935 INFO L85 PathProgramCache]: Analyzing trace with hash -1481823070, now seen corresponding path program 2 times [2023-12-19 18:12:00,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:12:00,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927452957] [2023-12-19 18:12:00,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:12:00,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:12:00,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:12:00,997 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-19 18:12:00,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:12:00,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927452957] [2023-12-19 18:12:00,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927452957] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 18:12:00,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747983920] [2023-12-19 18:12:00,998 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-19 18:12:00,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:12:00,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:12:00,999 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) [2023-12-19 18:12:01,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-19 18:12:01,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-19 18:12:01,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 18:12:01,071 INFO L262 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-19 18:12:01,072 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 18:12:01,094 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-19 18:12:01,094 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 18:12:01,142 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-19 18:12:01,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747983920] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 18:12:01,143 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 18:12:01,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-12-19 18:12:01,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394241863] [2023-12-19 18:12:01,143 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 18:12:01,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-12-19 18:12:01,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:12:01,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-12-19 18:12:01,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2023-12-19 18:12:01,149 INFO L87 Difference]: Start difference. First operand 38 states and 52 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 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) [2023-12-19 18:12:01,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:12:01,281 INFO L93 Difference]: Finished difference Result 71 states and 93 transitions. [2023-12-19 18:12:01,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-19 18:12:01,284 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 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 13 [2023-12-19 18:12:01,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:12:01,285 INFO L225 Difference]: With dead ends: 71 [2023-12-19 18:12:01,285 INFO L226 Difference]: Without dead ends: 61 [2023-12-19 18:12:01,285 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2023-12-19 18:12:01,285 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 19 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-19 18:12:01,286 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 32 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-19 18:12:01,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-12-19 18:12:01,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 45. [2023-12-19 18:12:01,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.4318181818181819) internal successors, (63), 44 states have internal predecessors, (63), 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) [2023-12-19 18:12:01,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 63 transitions. [2023-12-19 18:12:01,301 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 63 transitions. Word has length 13 [2023-12-19 18:12:01,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:12:01,302 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 63 transitions. [2023-12-19 18:12:01,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 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) [2023-12-19 18:12:01,302 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 63 transitions. [2023-12-19 18:12:01,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-12-19 18:12:01,302 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:12:01,302 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:12:01,309 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-19 18:12:01,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:12:01,507 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:12:01,508 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:12:01,508 INFO L85 PathProgramCache]: Analyzing trace with hash 1847797890, now seen corresponding path program 3 times [2023-12-19 18:12:01,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:12:01,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411911951] [2023-12-19 18:12:01,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:12:01,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:12:01,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:12:01,794 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 18:12:01,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:12:01,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411911951] [2023-12-19 18:12:01,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411911951] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 18:12:01,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907427962] [2023-12-19 18:12:01,795 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-19 18:12:01,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:12:01,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:12:01,796 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) [2023-12-19 18:12:01,840 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-19 18:12:01,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-12-19 18:12:01,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 18:12:01,855 WARN L260 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 35 conjunts are in the unsatisfiable core [2023-12-19 18:12:01,856 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 18:12:02,086 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 18:12:02,086 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 18:12:02,278 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 18:12:02,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907427962] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 18:12:02,278 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 18:12:02,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 9] total 25 [2023-12-19 18:12:02,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761825265] [2023-12-19 18:12:02,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 18:12:02,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-12-19 18:12:02,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:12:02,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-12-19 18:12:02,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2023-12-19 18:12:02,280 INFO L87 Difference]: Start difference. First operand 45 states and 63 transitions. Second operand has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 25 states have internal predecessors, (36), 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) [2023-12-19 18:12:08,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:12:08,907 INFO L93 Difference]: Finished difference Result 96 states and 119 transitions. [2023-12-19 18:12:08,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-12-19 18:12:08,907 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 25 states have internal predecessors, (36), 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 [2023-12-19 18:12:08,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:12:08,908 INFO L225 Difference]: With dead ends: 96 [2023-12-19 18:12:08,908 INFO L226 Difference]: Without dead ends: 72 [2023-12-19 18:12:08,909 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 568 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=313, Invalid=1943, Unknown=0, NotChecked=0, Total=2256 [2023-12-19 18:12:08,909 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 61 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-12-19 18:12:08,909 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 113 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 346 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-12-19 18:12:08,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2023-12-19 18:12:08,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 45. [2023-12-19 18:12:08,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.4090909090909092) internal successors, (62), 44 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:12:08,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 62 transitions. [2023-12-19 18:12:08,927 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 62 transitions. Word has length 14 [2023-12-19 18:12:08,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:12:08,927 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 62 transitions. [2023-12-19 18:12:08,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 25 states have internal predecessors, (36), 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) [2023-12-19 18:12:08,928 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 62 transitions. [2023-12-19 18:12:08,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-12-19 18:12:08,928 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:12:08,928 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:12:08,934 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-19 18:12:09,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:12:09,134 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:12:09,134 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:12:09,135 INFO L85 PathProgramCache]: Analyzing trace with hash -904677104, now seen corresponding path program 4 times [2023-12-19 18:12:09,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:12:09,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520991975] [2023-12-19 18:12:09,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:12:09,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:12:09,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:12:09,224 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-19 18:12:09,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:12:09,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520991975] [2023-12-19 18:12:09,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520991975] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 18:12:09,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178028300] [2023-12-19 18:12:09,225 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-19 18:12:09,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:12:09,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:12:09,226 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) [2023-12-19 18:12:09,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-19 18:12:09,257 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-19 18:12:09,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 18:12:09,258 INFO L262 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 20 conjunts are in the unsatisfiable core [2023-12-19 18:12:09,259 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 18:12:09,297 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-19 18:12:09,298 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 18:12:09,390 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-19 18:12:09,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178028300] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 18:12:09,390 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 18:12:09,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-12-19 18:12:09,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306343674] [2023-12-19 18:12:09,390 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 18:12:09,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-19 18:12:09,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:12:09,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-19 18:12:09,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2023-12-19 18:12:09,392 INFO L87 Difference]: Start difference. First operand 45 states and 62 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:12:09,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:12:09,643 INFO L93 Difference]: Finished difference Result 83 states and 109 transitions. [2023-12-19 18:12:09,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-12-19 18:12:09,643 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-12-19 18:12:09,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:12:09,644 INFO L225 Difference]: With dead ends: 83 [2023-12-19 18:12:09,644 INFO L226 Difference]: Without dead ends: 68 [2023-12-19 18:12:09,644 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2023-12-19 18:12:09,645 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 24 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-19 18:12:09,645 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 68 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-19 18:12:09,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2023-12-19 18:12:09,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 50. [2023-12-19 18:12:09,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.3877551020408163) internal successors, (68), 49 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:12:09,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 68 transitions. [2023-12-19 18:12:09,679 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 68 transitions. Word has length 16 [2023-12-19 18:12:09,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:12:09,679 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 68 transitions. [2023-12-19 18:12:09,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:12:09,679 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 68 transitions. [2023-12-19 18:12:09,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-12-19 18:12:09,680 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:12:09,680 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:12:09,697 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-12-19 18:12:09,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:12:09,888 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:12:09,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:12:09,889 INFO L85 PathProgramCache]: Analyzing trace with hash 1519806738, now seen corresponding path program 5 times [2023-12-19 18:12:09,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:12:09,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110344661] [2023-12-19 18:12:09,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:12:09,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:12:09,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:12:10,417 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 18:12:10,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:12:10,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110344661] [2023-12-19 18:12:10,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110344661] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 18:12:10,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066436482] [2023-12-19 18:12:10,417 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-19 18:12:10,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:12:10,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:12:10,418 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) [2023-12-19 18:12:10,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-19 18:12:10,467 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-12-19 18:12:10,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 18:12:10,468 WARN L260 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 45 conjunts are in the unsatisfiable core [2023-12-19 18:12:10,469 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 18:12:10,998 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 18:12:10,998 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 18:12:11,481 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 18:12:11,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066436482] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 18:12:11,482 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 18:12:11,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 12] total 33 [2023-12-19 18:12:11,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305733338] [2023-12-19 18:12:11,482 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 18:12:11,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-12-19 18:12:11,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:12:11,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-12-19 18:12:11,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=977, Unknown=0, NotChecked=0, Total=1122 [2023-12-19 18:12:11,483 INFO L87 Difference]: Start difference. First operand 50 states and 68 transitions. Second operand has 34 states, 34 states have (on average 1.3529411764705883) internal successors, (46), 33 states have internal predecessors, (46), 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) [2023-12-19 18:12:14,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:12:14,245 INFO L93 Difference]: Finished difference Result 114 states and 137 transitions. [2023-12-19 18:12:14,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-12-19 18:12:14,246 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.3529411764705883) internal successors, (46), 33 states have internal predecessors, (46), 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 [2023-12-19 18:12:14,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:12:14,246 INFO L225 Difference]: With dead ends: 114 [2023-12-19 18:12:14,246 INFO L226 Difference]: Without dead ends: 83 [2023-12-19 18:12:14,248 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1071 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=473, Invalid=3559, Unknown=0, NotChecked=0, Total=4032 [2023-12-19 18:12:14,248 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 93 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 541 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-19 18:12:14,248 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 131 Invalid, 570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 541 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-19 18:12:14,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2023-12-19 18:12:14,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 46. [2023-12-19 18:12:14,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.4222222222222223) internal successors, (64), 45 states have internal predecessors, (64), 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) [2023-12-19 18:12:14,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 64 transitions. [2023-12-19 18:12:14,278 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 64 transitions. Word has length 17 [2023-12-19 18:12:14,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:12:14,279 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 64 transitions. [2023-12-19 18:12:14,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.3529411764705883) internal successors, (46), 33 states have internal predecessors, (46), 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) [2023-12-19 18:12:14,279 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 64 transitions. [2023-12-19 18:12:14,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-12-19 18:12:14,280 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:12:14,280 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:12:14,285 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-12-19 18:12:14,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:12:14,485 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:12:14,486 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:12:14,486 INFO L85 PathProgramCache]: Analyzing trace with hash 1015626514, now seen corresponding path program 6 times [2023-12-19 18:12:14,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:12:14,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660200230] [2023-12-19 18:12:14,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:12:14,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:12:14,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:12:14,626 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-19 18:12:14,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:12:14,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660200230] [2023-12-19 18:12:14,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660200230] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 18:12:14,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522949597] [2023-12-19 18:12:14,626 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-19 18:12:14,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:12:14,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:12:14,627 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) [2023-12-19 18:12:14,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-19 18:12:14,665 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-12-19 18:12:14,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 18:12:14,666 INFO L262 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 20 conjunts are in the unsatisfiable core [2023-12-19 18:12:14,667 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 18:12:14,704 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-19 18:12:14,705 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 18:12:14,781 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-12-19 18:12:14,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522949597] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 18:12:14,782 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 18:12:14,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 6] total 18 [2023-12-19 18:12:14,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956519734] [2023-12-19 18:12:14,782 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 18:12:14,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-19 18:12:14,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:12:14,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-19 18:12:14,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2023-12-19 18:12:14,783 INFO L87 Difference]: Start difference. First operand 46 states and 64 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 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) [2023-12-19 18:12:14,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:12:14,910 INFO L93 Difference]: Finished difference Result 86 states and 116 transitions. [2023-12-19 18:12:14,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-12-19 18:12:14,910 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 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 [2023-12-19 18:12:14,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:12:14,911 INFO L225 Difference]: With dead ends: 86 [2023-12-19 18:12:14,911 INFO L226 Difference]: Without dead ends: 77 [2023-12-19 18:12:14,912 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=137, Invalid=415, Unknown=0, NotChecked=0, Total=552 [2023-12-19 18:12:14,914 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 25 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-19 18:12:14,914 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 83 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-19 18:12:14,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2023-12-19 18:12:14,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 54. [2023-12-19 18:12:14,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.3584905660377358) internal successors, (72), 53 states have internal predecessors, (72), 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) [2023-12-19 18:12:14,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 72 transitions. [2023-12-19 18:12:14,944 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 72 transitions. Word has length 17 [2023-12-19 18:12:14,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:12:14,944 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 72 transitions. [2023-12-19 18:12:14,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 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) [2023-12-19 18:12:14,945 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 72 transitions. [2023-12-19 18:12:14,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-12-19 18:12:14,945 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:12:14,945 INFO L195 NwaCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:12:14,950 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-12-19 18:12:15,153 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,SelfDestructingSolverStorable8 [2023-12-19 18:12:15,153 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:12:15,153 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:12:15,153 INFO L85 PathProgramCache]: Analyzing trace with hash -1518488751, now seen corresponding path program 7 times [2023-12-19 18:12:15,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:12:15,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342470800] [2023-12-19 18:12:15,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:12:15,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:12:15,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:12:15,271 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-19 18:12:15,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:12:15,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342470800] [2023-12-19 18:12:15,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342470800] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 18:12:15,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352888450] [2023-12-19 18:12:15,272 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-19 18:12:15,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:12:15,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:12:15,279 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) [2023-12-19 18:12:15,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-19 18:12:15,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:12:15,319 INFO L262 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 23 conjunts are in the unsatisfiable core [2023-12-19 18:12:15,320 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 18:12:15,342 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-19 18:12:15,343 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 18:12:15,550 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-19 18:12:15,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352888450] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 18:12:15,550 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 18:12:15,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2023-12-19 18:12:15,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493597488] [2023-12-19 18:12:15,551 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 18:12:15,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-12-19 18:12:15,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:12:15,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-12-19 18:12:15,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=466, Unknown=0, NotChecked=0, Total=600 [2023-12-19 18:12:15,552 INFO L87 Difference]: Start difference. First operand 54 states and 72 transitions. Second operand has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 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) [2023-12-19 18:12:27,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:12:27,964 INFO L93 Difference]: Finished difference Result 200 states and 286 transitions. [2023-12-19 18:12:27,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2023-12-19 18:12:27,965 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 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 18 [2023-12-19 18:12:27,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:12:27,966 INFO L225 Difference]: With dead ends: 200 [2023-12-19 18:12:27,966 INFO L226 Difference]: Without dead ends: 189 [2023-12-19 18:12:27,967 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2862 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=2268, Invalid=6104, Unknown=0, NotChecked=0, Total=8372 [2023-12-19 18:12:27,967 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 509 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 244 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 509 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 661 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 244 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-19 18:12:27,968 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [509 Valid, 158 Invalid, 661 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [244 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-19 18:12:27,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2023-12-19 18:12:28,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 77. [2023-12-19 18:12:28,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.381578947368421) internal successors, (105), 76 states have internal predecessors, (105), 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) [2023-12-19 18:12:28,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 105 transitions. [2023-12-19 18:12:28,002 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 105 transitions. Word has length 18 [2023-12-19 18:12:28,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:12:28,002 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 105 transitions. [2023-12-19 18:12:28,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 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) [2023-12-19 18:12:28,002 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 105 transitions. [2023-12-19 18:12:28,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-12-19 18:12:28,005 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:12:28,005 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:12:28,012 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-12-19 18:12:28,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-12-19 18:12:28,217 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:12:28,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:12:28,218 INFO L85 PathProgramCache]: Analyzing trace with hash 2026879586, now seen corresponding path program 8 times [2023-12-19 18:12:28,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:12:28,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094465177] [2023-12-19 18:12:28,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:12:28,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:12:28,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:12:28,341 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-19 18:12:28,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:12:28,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094465177] [2023-12-19 18:12:28,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094465177] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 18:12:28,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398458647] [2023-12-19 18:12:28,341 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-19 18:12:28,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:12:28,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:12:28,360 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) [2023-12-19 18:12:28,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-19 18:12:28,410 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-19 18:12:28,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 18:12:28,411 INFO L262 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 26 conjunts are in the unsatisfiable core [2023-12-19 18:12:28,412 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 18:12:28,467 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-19 18:12:28,467 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 18:12:28,602 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-19 18:12:28,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398458647] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 18:12:28,602 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 18:12:28,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2023-12-19 18:12:28,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222851514] [2023-12-19 18:12:28,603 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 18:12:28,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-12-19 18:12:28,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:12:28,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-12-19 18:12:28,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2023-12-19 18:12:28,603 INFO L87 Difference]: Start difference. First operand 77 states and 105 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 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) [2023-12-19 18:12:28,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:12:28,912 INFO L93 Difference]: Finished difference Result 127 states and 165 transitions. [2023-12-19 18:12:28,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-12-19 18:12:28,913 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-12-19 18:12:28,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:12:28,913 INFO L225 Difference]: With dead ends: 127 [2023-12-19 18:12:28,914 INFO L226 Difference]: Without dead ends: 109 [2023-12-19 18:12:28,914 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=144, Invalid=668, Unknown=0, NotChecked=0, Total=812 [2023-12-19 18:12:28,914 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 34 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-19 18:12:28,915 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 61 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-19 18:12:28,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2023-12-19 18:12:28,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 86. [2023-12-19 18:12:28,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.3764705882352941) internal successors, (117), 85 states have internal predecessors, (117), 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) [2023-12-19 18:12:28,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 117 transitions. [2023-12-19 18:12:28,947 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 117 transitions. Word has length 19 [2023-12-19 18:12:28,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:12:28,947 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 117 transitions. [2023-12-19 18:12:28,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 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) [2023-12-19 18:12:28,948 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 117 transitions. [2023-12-19 18:12:28,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-12-19 18:12:28,948 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:12:28,948 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:12:28,958 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-12-19 18:12:29,153 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,SelfDestructingSolverStorable10 [2023-12-19 18:12:29,153 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:12:29,153 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:12:29,153 INFO L85 PathProgramCache]: Analyzing trace with hash 39467650, now seen corresponding path program 9 times [2023-12-19 18:12:29,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:12:29,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612765495] [2023-12-19 18:12:29,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:12:29,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:12:29,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:12:29,625 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 18:12:29,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:12:29,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612765495] [2023-12-19 18:12:29,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612765495] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 18:12:29,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030305605] [2023-12-19 18:12:29,626 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-19 18:12:29,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:12:29,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:12:29,627 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) [2023-12-19 18:12:29,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-19 18:12:29,692 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-19 18:12:29,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 18:12:29,693 WARN L260 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 50 conjunts are in the unsatisfiable core [2023-12-19 18:12:29,694 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 18:12:30,151 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 18:12:30,151 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 18:12:30,652 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 18:12:30,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030305605] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 18:12:30,653 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 18:12:30,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 13] total 37 [2023-12-19 18:12:30,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768933838] [2023-12-19 18:12:30,653 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 18:12:30,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-12-19 18:12:30,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:12:30,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-12-19 18:12:30,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1242, Unknown=0, NotChecked=0, Total=1406 [2023-12-19 18:12:30,654 INFO L87 Difference]: Start difference. First operand 86 states and 117 transitions. Second operand has 38 states, 38 states have (on average 1.4473684210526316) internal successors, (55), 37 states have internal predecessors, (55), 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) [2023-12-19 18:12:33,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:12:33,660 INFO L93 Difference]: Finished difference Result 167 states and 206 transitions. [2023-12-19 18:12:33,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-12-19 18:12:33,660 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.4473684210526316) internal successors, (55), 37 states have internal predecessors, (55), 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 [2023-12-19 18:12:33,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:12:33,661 INFO L225 Difference]: With dead ends: 167 [2023-12-19 18:12:33,661 INFO L226 Difference]: Without dead ends: 133 [2023-12-19 18:12:33,662 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 933 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=434, Invalid=3348, Unknown=0, NotChecked=0, Total=3782 [2023-12-19 18:12:33,662 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 80 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 542 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-19 18:12:33,662 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 168 Invalid, 583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 542 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-19 18:12:33,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2023-12-19 18:12:33,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 85. [2023-12-19 18:12:33,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.369047619047619) internal successors, (115), 84 states have internal predecessors, (115), 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) [2023-12-19 18:12:33,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 115 transitions. [2023-12-19 18:12:33,698 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 115 transitions. Word has length 20 [2023-12-19 18:12:33,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:12:33,698 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 115 transitions. [2023-12-19 18:12:33,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.4473684210526316) internal successors, (55), 37 states have internal predecessors, (55), 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) [2023-12-19 18:12:33,698 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 115 transitions. [2023-12-19 18:12:33,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-12-19 18:12:33,698 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:12:33,698 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:12:33,703 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-12-19 18:12:33,903 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,SelfDestructingSolverStorable11 [2023-12-19 18:12:33,903 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:12:33,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:12:33,903 INFO L85 PathProgramCache]: Analyzing trace with hash -920435760, now seen corresponding path program 10 times [2023-12-19 18:12:33,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:12:33,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588451495] [2023-12-19 18:12:33,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:12:33,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:12:33,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:12:34,008 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-19 18:12:34,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:12:34,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588451495] [2023-12-19 18:12:34,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588451495] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 18:12:34,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357556714] [2023-12-19 18:12:34,009 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-19 18:12:34,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:12:34,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:12:34,010 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) [2023-12-19 18:12:34,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-19 18:12:34,067 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-19 18:12:34,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 18:12:34,068 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 32 conjunts are in the unsatisfiable core [2023-12-19 18:12:34,068 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 18:12:34,143 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-19 18:12:34,143 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 18:12:34,316 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-19 18:12:34,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357556714] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 18:12:34,316 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 18:12:34,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 28 [2023-12-19 18:12:34,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13752751] [2023-12-19 18:12:34,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 18:12:34,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-12-19 18:12:34,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:12:34,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-12-19 18:12:34,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=631, Unknown=0, NotChecked=0, Total=756 [2023-12-19 18:12:34,317 INFO L87 Difference]: Start difference. First operand 85 states and 115 transitions. Second operand has 28 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 28 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:12:34,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:12:34,817 INFO L93 Difference]: Finished difference Result 149 states and 193 transitions. [2023-12-19 18:12:34,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-12-19 18:12:34,817 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 28 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2023-12-19 18:12:34,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:12:34,817 INFO L225 Difference]: With dead ends: 149 [2023-12-19 18:12:34,817 INFO L226 Difference]: Without dead ends: 118 [2023-12-19 18:12:34,818 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=194, Invalid=996, Unknown=0, NotChecked=0, Total=1190 [2023-12-19 18:12:34,819 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 36 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-19 18:12:34,819 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 99 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 366 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-19 18:12:34,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2023-12-19 18:12:34,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 93. [2023-12-19 18:12:34,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.3478260869565217) internal successors, (124), 92 states have internal predecessors, (124), 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) [2023-12-19 18:12:34,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 124 transitions. [2023-12-19 18:12:34,863 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 124 transitions. Word has length 22 [2023-12-19 18:12:34,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:12:34,863 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 124 transitions. [2023-12-19 18:12:34,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 28 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:12:34,863 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 124 transitions. [2023-12-19 18:12:34,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-12-19 18:12:34,863 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:12:34,863 INFO L195 NwaCegarLoop]: trace histogram [10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:12:34,874 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-12-19 18:12:35,068 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,SelfDestructingSolverStorable12 [2023-12-19 18:12:35,068 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:12:35,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:12:35,068 INFO L85 PathProgramCache]: Analyzing trace with hash 1060247810, now seen corresponding path program 11 times [2023-12-19 18:12:35,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:12:35,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359560960] [2023-12-19 18:12:35,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:12:35,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:12:35,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:12:35,215 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-19 18:12:35,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:12:35,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359560960] [2023-12-19 18:12:35,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359560960] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 18:12:35,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777937775] [2023-12-19 18:12:35,215 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-19 18:12:35,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:12:35,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:12:35,228 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) [2023-12-19 18:12:35,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-19 18:12:35,323 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-12-19 18:12:35,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 18:12:35,324 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 27 conjunts are in the unsatisfiable core [2023-12-19 18:12:35,325 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 18:12:35,342 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-19 18:12:35,342 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 18:12:35,554 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-19 18:12:35,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777937775] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 18:12:35,554 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 18:12:35,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 26 [2023-12-19 18:12:35,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384830530] [2023-12-19 18:12:35,554 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 18:12:35,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-12-19 18:12:35,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:12:35,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-12-19 18:12:35,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=531, Unknown=0, NotChecked=0, Total=702 [2023-12-19 18:12:35,555 INFO L87 Difference]: Start difference. First operand 93 states and 124 transitions. Second operand has 27 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 26 states have internal predecessors, (45), 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) [2023-12-19 18:12:48,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:12:48,141 INFO L93 Difference]: Finished difference Result 349 states and 463 transitions. [2023-12-19 18:12:48,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2023-12-19 18:12:48,141 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 26 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2023-12-19 18:12:48,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:12:48,142 INFO L225 Difference]: With dead ends: 349 [2023-12-19 18:12:48,143 INFO L226 Difference]: Without dead ends: 300 [2023-12-19 18:12:48,144 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1002 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=1381, Invalid=3041, Unknown=0, NotChecked=0, Total=4422 [2023-12-19 18:12:48,146 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 396 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 232 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 396 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 232 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-19 18:12:48,147 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [396 Valid, 219 Invalid, 649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [232 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-19 18:12:48,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2023-12-19 18:12:48,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 118. [2023-12-19 18:12:48,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 1.376068376068376) internal successors, (161), 117 states have internal predecessors, (161), 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) [2023-12-19 18:12:48,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 161 transitions. [2023-12-19 18:12:48,232 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 161 transitions. Word has length 22 [2023-12-19 18:12:48,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:12:48,232 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 161 transitions. [2023-12-19 18:12:48,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 26 states have internal predecessors, (45), 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) [2023-12-19 18:12:48,233 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 161 transitions. [2023-12-19 18:12:48,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-12-19 18:12:48,233 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:12:48,233 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:12:48,239 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-12-19 18:12:48,437 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,SelfDestructingSolverStorable13 [2023-12-19 18:12:48,437 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:12:48,437 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:12:48,438 INFO L85 PathProgramCache]: Analyzing trace with hash 493700754, now seen corresponding path program 12 times [2023-12-19 18:12:48,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:12:48,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196776041] [2023-12-19 18:12:48,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:12:48,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:12:48,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:12:49,102 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 18:12:49,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:12:49,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196776041] [2023-12-19 18:12:49,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196776041] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 18:12:49,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492393035] [2023-12-19 18:12:49,102 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-19 18:12:49,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:12:49,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:12:49,103 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) [2023-12-19 18:12:49,106 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-12-19 18:12:49,199 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-12-19 18:12:49,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 18:12:49,200 WARN L260 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 60 conjunts are in the unsatisfiable core [2023-12-19 18:12:49,201 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 18:12:49,888 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 18:12:49,888 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 18:12:50,554 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 18:12:50,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492393035] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 18:12:50,555 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 18:12:50,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 15] total 43 [2023-12-19 18:12:50,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325995040] [2023-12-19 18:12:50,555 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 18:12:50,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-12-19 18:12:50,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:12:50,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-12-19 18:12:50,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=1688, Unknown=0, NotChecked=0, Total=1892 [2023-12-19 18:12:50,556 INFO L87 Difference]: Start difference. First operand 118 states and 161 transitions. Second operand has 44 states, 44 states have (on average 1.4545454545454546) internal successors, (64), 43 states have internal predecessors, (64), 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) [2023-12-19 18:12:57,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:12:57,212 INFO L93 Difference]: Finished difference Result 219 states and 272 transitions. [2023-12-19 18:12:57,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-12-19 18:12:57,213 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.4545454545454546) internal successors, (64), 43 states have internal predecessors, (64), 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 23 [2023-12-19 18:12:57,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:12:57,214 INFO L225 Difference]: With dead ends: 219 [2023-12-19 18:12:57,214 INFO L226 Difference]: Without dead ends: 180 [2023-12-19 18:12:57,215 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1223 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=539, Invalid=4431, Unknown=0, NotChecked=0, Total=4970 [2023-12-19 18:12:57,215 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 94 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 685 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-12-19 18:12:57,215 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 198 Invalid, 741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 685 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-12-19 18:12:57,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2023-12-19 18:12:57,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 117. [2023-12-19 18:12:57,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.3706896551724137) internal successors, (159), 116 states have internal predecessors, (159), 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) [2023-12-19 18:12:57,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 159 transitions. [2023-12-19 18:12:57,275 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 159 transitions. Word has length 23 [2023-12-19 18:12:57,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:12:57,275 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 159 transitions. [2023-12-19 18:12:57,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.4545454545454546) internal successors, (64), 43 states have internal predecessors, (64), 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) [2023-12-19 18:12:57,275 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 159 transitions. [2023-12-19 18:12:57,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-12-19 18:12:57,276 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:12:57,276 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:12:57,283 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-12-19 18:12:57,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:12:57,479 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:12:57,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:12:57,479 INFO L85 PathProgramCache]: Analyzing trace with hash 605681698, now seen corresponding path program 13 times [2023-12-19 18:12:57,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:12:57,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881336694] [2023-12-19 18:12:57,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:12:57,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:12:57,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:12:57,630 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-19 18:12:57,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:12:57,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881336694] [2023-12-19 18:12:57,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881336694] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 18:12:57,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429084464] [2023-12-19 18:12:57,630 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-19 18:12:57,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:12:57,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:12:57,632 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 18:12:57,634 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-12-19 18:12:57,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:12:57,675 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 38 conjunts are in the unsatisfiable core [2023-12-19 18:12:57,676 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 18:12:57,767 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-19 18:12:57,767 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 18:12:57,975 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-19 18:12:57,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429084464] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 18:12:57,975 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 18:12:57,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 33 [2023-12-19 18:12:57,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388872918] [2023-12-19 18:12:57,975 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 18:12:57,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-12-19 18:12:57,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:12:57,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-12-19 18:12:57,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=895, Unknown=0, NotChecked=0, Total=1056 [2023-12-19 18:12:57,977 INFO L87 Difference]: Start difference. First operand 117 states and 159 transitions. Second operand has 33 states, 33 states have (on average 1.303030303030303) internal successors, (43), 33 states have internal predecessors, (43), 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) [2023-12-19 18:12:58,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:12:58,924 INFO L93 Difference]: Finished difference Result 201 states and 262 transitions. [2023-12-19 18:12:58,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-12-19 18:12:58,925 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.303030303030303) internal successors, (43), 33 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2023-12-19 18:12:58,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:12:58,925 INFO L225 Difference]: With dead ends: 201 [2023-12-19 18:12:58,925 INFO L226 Difference]: Without dead ends: 159 [2023-12-19 18:12:58,926 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=251, Invalid=1389, Unknown=0, NotChecked=0, Total=1640 [2023-12-19 18:12:58,926 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 46 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-19 18:12:58,926 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 90 Invalid, 536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 512 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-19 18:12:58,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2023-12-19 18:12:58,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 127. [2023-12-19 18:12:58,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 1.3571428571428572) internal successors, (171), 126 states have internal predecessors, (171), 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) [2023-12-19 18:12:58,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 171 transitions. [2023-12-19 18:12:59,001 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 171 transitions. Word has length 25 [2023-12-19 18:12:59,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:12:59,001 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 171 transitions. [2023-12-19 18:12:59,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.303030303030303) internal successors, (43), 33 states have internal predecessors, (43), 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) [2023-12-19 18:12:59,002 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 171 transitions. [2023-12-19 18:12:59,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-12-19 18:12:59,002 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:12:59,002 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:12:59,009 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-12-19 18:12:59,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-12-19 18:12:59,207 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:12:59,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:12:59,208 INFO L85 PathProgramCache]: Analyzing trace with hash -553341822, now seen corresponding path program 14 times [2023-12-19 18:12:59,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:12:59,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589055487] [2023-12-19 18:12:59,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:12:59,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:12:59,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:12:59,834 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 18:12:59,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:12:59,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589055487] [2023-12-19 18:12:59,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589055487] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 18:12:59,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338277766] [2023-12-19 18:12:59,835 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-19 18:12:59,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:12:59,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:12:59,836 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 18:12:59,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-12-19 18:12:59,945 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-19 18:12:59,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 18:12:59,946 WARN L260 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 74 conjunts are in the unsatisfiable core [2023-12-19 18:12:59,947 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 18:13:00,567 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 18:13:00,567 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 18:13:01,248 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 18:13:01,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338277766] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 18:13:01,248 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 18:13:01,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 23, 17] total 54 [2023-12-19 18:13:01,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132989530] [2023-12-19 18:13:01,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 18:13:01,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2023-12-19 18:13:01,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:13:01,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2023-12-19 18:13:01,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=2667, Unknown=0, NotChecked=0, Total=2970 [2023-12-19 18:13:01,250 INFO L87 Difference]: Start difference. First operand 127 states and 171 transitions. Second operand has 55 states, 55 states have (on average 1.3454545454545455) internal successors, (74), 54 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:13:09,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:13:09,016 INFO L93 Difference]: Finished difference Result 234 states and 288 transitions. [2023-12-19 18:13:09,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-12-19 18:13:09,017 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.3454545454545455) internal successors, (74), 54 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2023-12-19 18:13:09,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:13:09,018 INFO L225 Difference]: With dead ends: 234 [2023-12-19 18:13:09,018 INFO L226 Difference]: Without dead ends: 188 [2023-12-19 18:13:09,020 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2013 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=773, Invalid=6537, Unknown=0, NotChecked=0, Total=7310 [2023-12-19 18:13:09,020 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 123 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 1156 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 1226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-12-19 18:13:09,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 331 Invalid, 1226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1156 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-12-19 18:13:09,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2023-12-19 18:13:09,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 119. [2023-12-19 18:13:09,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 1.38135593220339) internal successors, (163), 118 states have internal predecessors, (163), 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) [2023-12-19 18:13:09,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 163 transitions. [2023-12-19 18:13:09,095 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 163 transitions. Word has length 26 [2023-12-19 18:13:09,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:13:09,095 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 163 transitions. [2023-12-19 18:13:09,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.3454545454545455) internal successors, (74), 54 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:13:09,095 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 163 transitions. [2023-12-19 18:13:09,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-12-19 18:13:09,095 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:13:09,095 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:13:09,102 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-12-19 18:13:09,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-12-19 18:13:09,300 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:13:09,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:13:09,300 INFO L85 PathProgramCache]: Analyzing trace with hash 488824464, now seen corresponding path program 15 times [2023-12-19 18:13:09,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:13:09,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419084842] [2023-12-19 18:13:09,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:13:09,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:13:09,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:13:09,459 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-12-19 18:13:09,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:13:09,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419084842] [2023-12-19 18:13:09,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419084842] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 18:13:09,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297027765] [2023-12-19 18:13:09,459 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-19 18:13:09,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:13:09,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:13:09,460 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 18:13:09,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-12-19 18:13:09,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-12-19 18:13:09,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 18:13:09,574 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 44 conjunts are in the unsatisfiable core [2023-12-19 18:13:09,575 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 18:13:09,685 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-12-19 18:13:09,686 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 18:13:09,967 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-12-19 18:13:09,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297027765] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 18:13:09,967 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 18:13:09,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 38 [2023-12-19 18:13:09,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778322958] [2023-12-19 18:13:09,968 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 18:13:09,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-12-19 18:13:09,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:13:09,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-12-19 18:13:09,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1205, Unknown=0, NotChecked=0, Total=1406 [2023-12-19 18:13:09,969 INFO L87 Difference]: Start difference. First operand 119 states and 163 transitions. Second operand has 38 states, 38 states have (on average 1.263157894736842) internal successors, (48), 38 states have internal predecessors, (48), 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) [2023-12-19 18:13:11,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:13:11,525 INFO L93 Difference]: Finished difference Result 203 states and 267 transitions. [2023-12-19 18:13:11,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-12-19 18:13:11,526 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.263157894736842) internal successors, (48), 38 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2023-12-19 18:13:11,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:13:11,526 INFO L225 Difference]: With dead ends: 203 [2023-12-19 18:13:11,526 INFO L226 Difference]: Without dead ends: 162 [2023-12-19 18:13:11,528 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=315, Invalid=1847, Unknown=0, NotChecked=0, Total=2162 [2023-12-19 18:13:11,528 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 48 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 673 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 673 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-19 18:13:11,530 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 146 Invalid, 702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 673 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-19 18:13:11,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2023-12-19 18:13:11,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 128. [2023-12-19 18:13:11,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 1.3622047244094488) internal successors, (173), 127 states have internal predecessors, (173), 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) [2023-12-19 18:13:11,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 173 transitions. [2023-12-19 18:13:11,604 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 173 transitions. Word has length 28 [2023-12-19 18:13:11,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:13:11,604 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 173 transitions. [2023-12-19 18:13:11,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.263157894736842) internal successors, (48), 38 states have internal predecessors, (48), 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) [2023-12-19 18:13:11,604 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 173 transitions. [2023-12-19 18:13:11,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-12-19 18:13:11,605 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:13:11,605 INFO L195 NwaCegarLoop]: trace histogram [14, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:13:11,611 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-12-19 18:13:11,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-12-19 18:13:11,808 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:13:11,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:13:11,809 INFO L85 PathProgramCache]: Analyzing trace with hash 1795153361, now seen corresponding path program 16 times [2023-12-19 18:13:11,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:13:11,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381165527] [2023-12-19 18:13:11,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:13:11,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:13:11,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:13:12,045 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-19 18:13:12,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:13:12,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381165527] [2023-12-19 18:13:12,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381165527] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 18:13:12,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296712285] [2023-12-19 18:13:12,046 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-19 18:13:12,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:13:12,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:13:12,053 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 18:13:12,054 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-12-19 18:13:12,093 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-19 18:13:12,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 18:13:12,094 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 39 conjunts are in the unsatisfiable core [2023-12-19 18:13:12,095 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 18:13:12,123 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-19 18:13:12,123 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 18:13:12,601 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-19 18:13:12,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296712285] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 18:13:12,601 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 18:13:12,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 40 [2023-12-19 18:13:12,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405661340] [2023-12-19 18:13:12,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 18:13:12,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-12-19 18:13:12,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:13:12,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-12-19 18:13:12,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=324, Invalid=1316, Unknown=0, NotChecked=0, Total=1640 [2023-12-19 18:13:12,602 INFO L87 Difference]: Start difference. First operand 128 states and 173 transitions. Second operand has 41 states, 41 states have (on average 1.1951219512195121) internal successors, (49), 40 states have internal predecessors, (49), 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) [2023-12-19 18:13:26,221 WARN L293 SmtUtils]: Spent 5.07s on a formula simplification. DAG size of input: 62 DAG size of output: 61 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-19 18:13:35,989 WARN L293 SmtUtils]: Spent 6.19s on a formula simplification. DAG size of input: 58 DAG size of output: 57 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-19 18:14:09,867 WARN L293 SmtUtils]: Spent 25.59s on a formula simplification. DAG size of input: 74 DAG size of output: 73 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-19 18:14:37,807 WARN L293 SmtUtils]: Spent 15.42s on a formula simplification. DAG size of input: 71 DAG size of output: 70 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-19 18:14:53,390 WARN L293 SmtUtils]: Spent 10.94s on a formula simplification. DAG size of input: 70 DAG size of output: 69 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-19 18:15:11,077 WARN L293 SmtUtils]: Spent 6.71s on a formula simplification. DAG size of input: 68 DAG size of output: 67 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-19 18:15:26,268 WARN L293 SmtUtils]: Spent 10.21s on a formula simplification. DAG size of input: 67 DAG size of output: 66 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-19 18:15:42,596 WARN L293 SmtUtils]: Spent 10.61s on a formula simplification. DAG size of input: 66 DAG size of output: 65 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-19 18:16:00,833 WARN L293 SmtUtils]: Spent 7.73s on a formula simplification. DAG size of input: 65 DAG size of output: 64 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-19 18:16:27,745 WARN L293 SmtUtils]: Spent 10.03s on a formula simplification. DAG size of input: 63 DAG size of output: 62 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-19 18:16:37,829 WARN L293 SmtUtils]: Spent 6.89s on a formula simplification. DAG size of input: 62 DAG size of output: 61 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-19 18:17:28,200 WARN L293 SmtUtils]: Spent 9.57s on a formula simplification. DAG size of input: 72 DAG size of output: 71 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-19 18:17:40,726 WARN L293 SmtUtils]: Spent 5.57s on a formula simplification. DAG size of input: 56 DAG size of output: 55 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-19 18:18:13,913 WARN L293 SmtUtils]: Spent 5.48s on a formula simplification. DAG size of input: 68 DAG size of output: 67 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-19 18:18:38,747 WARN L293 SmtUtils]: Spent 5.30s on a formula simplification. DAG size of input: 59 DAG size of output: 58 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-19 18:18:52,692 WARN L293 SmtUtils]: Spent 5.99s on a formula simplification. DAG size of input: 64 DAG size of output: 63 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-19 18:19:21,441 WARN L293 SmtUtils]: Spent 8.80s on a formula simplification. DAG size of input: 62 DAG size of output: 61 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-19 18:21:03,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:21:03,818 INFO L93 Difference]: Finished difference Result 593 states and 789 transitions. [2023-12-19 18:21:03,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 221 states. [2023-12-19 18:21:03,819 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.1951219512195121) internal successors, (49), 40 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2023-12-19 18:21:03,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:21:03,820 INFO L225 Difference]: With dead ends: 593 [2023-12-19 18:21:03,820 INFO L226 Difference]: Without dead ends: 576 [2023-12-19 18:21:03,823 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 242 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23937 ImplicationChecksByTransitivity, 465.3s TimeCoverageRelationStatistics Valid=12960, Invalid=46328, Unknown=4, NotChecked=0, Total=59292 [2023-12-19 18:21:03,824 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 1683 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 1051 mSolverCounterSat, 1070 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1683 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 2121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1070 IncrementalHoareTripleChecker+Valid, 1051 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2023-12-19 18:21:03,824 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1683 Valid, 329 Invalid, 2121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1070 Valid, 1051 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2023-12-19 18:21:03,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2023-12-19 18:21:03,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 179. [2023-12-19 18:21:03,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 1.353932584269663) internal successors, (241), 178 states have internal predecessors, (241), 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) [2023-12-19 18:21:03,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 241 transitions. [2023-12-19 18:21:03,956 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 241 transitions. Word has length 28 [2023-12-19 18:21:03,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:21:03,956 INFO L495 AbstractCegarLoop]: Abstraction has 179 states and 241 transitions. [2023-12-19 18:21:03,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.1951219512195121) internal successors, (49), 40 states have internal predecessors, (49), 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) [2023-12-19 18:21:03,957 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 241 transitions. [2023-12-19 18:21:03,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-12-19 18:21:03,957 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:21:03,957 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:21:03,962 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-12-19 18:21:04,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:21:04,162 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:21:04,162 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:21:04,162 INFO L85 PathProgramCache]: Analyzing trace with hash 5440530, now seen corresponding path program 17 times [2023-12-19 18:21:04,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:21:04,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960590993] [2023-12-19 18:21:04,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:21:04,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:21:04,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:21:04,930 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 18:21:04,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:21:04,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960590993] [2023-12-19 18:21:04,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960590993] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 18:21:04,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871486169] [2023-12-19 18:21:04,931 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-19 18:21:04,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:21:04,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:21:04,936 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 18:21:04,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-12-19 18:21:05,456 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-12-19 18:21:05,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 18:21:05,458 WARN L260 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 72 conjunts are in the unsatisfiable core [2023-12-19 18:21:05,459 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 18:21:06,426 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 18:21:06,427 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 18:21:07,967 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 18:21:07,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871486169] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 18:21:07,967 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 18:21:07,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 26, 26] total 67 [2023-12-19 18:21:07,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319619156] [2023-12-19 18:21:07,967 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 18:21:07,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2023-12-19 18:21:07,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:21:07,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2023-12-19 18:21:07,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=391, Invalid=4165, Unknown=0, NotChecked=0, Total=4556 [2023-12-19 18:21:07,968 INFO L87 Difference]: Start difference. First operand 179 states and 241 transitions. Second operand has 68 states, 68 states have (on average 1.2058823529411764) internal successors, (82), 67 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) [2023-12-19 18:21:34,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:21:34,109 INFO L93 Difference]: Finished difference Result 319 states and 394 transitions. [2023-12-19 18:21:34,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2023-12-19 18:21:34,109 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 1.2058823529411764) internal successors, (82), 67 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 29 [2023-12-19 18:21:34,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:21:34,110 INFO L225 Difference]: With dead ends: 319 [2023-12-19 18:21:34,110 INFO L226 Difference]: Without dead ends: 268 [2023-12-19 18:21:34,111 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3101 ImplicationChecksByTransitivity, 25.4s TimeCoverageRelationStatistics Valid=1092, Invalid=10464, Unknown=0, NotChecked=0, Total=11556 [2023-12-19 18:21:34,113 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 154 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 1462 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 1547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2023-12-19 18:21:34,113 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 415 Invalid, 1547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1462 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2023-12-19 18:21:34,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2023-12-19 18:21:34,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 178. [2023-12-19 18:21:34,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 1.3559322033898304) internal successors, (240), 177 states have internal predecessors, (240), 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) [2023-12-19 18:21:34,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 240 transitions. [2023-12-19 18:21:34,254 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 240 transitions. Word has length 29 [2023-12-19 18:21:34,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:21:34,254 INFO L495 AbstractCegarLoop]: Abstraction has 178 states and 240 transitions. [2023-12-19 18:21:34,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 1.2058823529411764) internal successors, (82), 67 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) [2023-12-19 18:21:34,254 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 240 transitions. [2023-12-19 18:21:34,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-12-19 18:21:34,254 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:21:34,255 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:21:34,262 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-12-19 18:21:34,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:21:34,463 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:21:34,463 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:21:34,463 INFO L85 PathProgramCache]: Analyzing trace with hash -574364190, now seen corresponding path program 18 times [2023-12-19 18:21:34,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:21:34,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198548563] [2023-12-19 18:21:34,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:21:34,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:21:34,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:21:34,665 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-12-19 18:21:34,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:21:34,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198548563] [2023-12-19 18:21:34,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198548563] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 18:21:34,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616661770] [2023-12-19 18:21:34,665 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-19 18:21:34,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:21:34,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:21:34,666 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 18:21:34,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-12-19 18:21:34,776 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-12-19 18:21:34,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 18:21:34,778 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 50 conjunts are in the unsatisfiable core [2023-12-19 18:21:34,778 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 18:21:34,913 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-12-19 18:21:34,913 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 18:21:35,290 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-12-19 18:21:35,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616661770] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 18:21:35,290 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 18:21:35,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 43 [2023-12-19 18:21:35,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33751384] [2023-12-19 18:21:35,290 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 18:21:35,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-12-19 18:21:35,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:21:35,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-12-19 18:21:35,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=1561, Unknown=0, NotChecked=0, Total=1806 [2023-12-19 18:21:35,291 INFO L87 Difference]: Start difference. First operand 178 states and 240 transitions. Second operand has 43 states, 43 states have (on average 1.2325581395348837) internal successors, (53), 43 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:21:38,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:21:38,360 INFO L93 Difference]: Finished difference Result 297 states and 387 transitions. [2023-12-19 18:21:38,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-12-19 18:21:38,360 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.2325581395348837) internal successors, (53), 43 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2023-12-19 18:21:38,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:21:38,361 INFO L225 Difference]: With dead ends: 297 [2023-12-19 18:21:38,361 INFO L226 Difference]: Without dead ends: 235 [2023-12-19 18:21:38,362 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=386, Invalid=2370, Unknown=0, NotChecked=0, Total=2756 [2023-12-19 18:21:38,362 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 58 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 842 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 873 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 842 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-19 18:21:38,363 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 112 Invalid, 873 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 842 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-19 18:21:38,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2023-12-19 18:21:38,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 190. [2023-12-19 18:21:38,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 1.343915343915344) internal successors, (254), 189 states have internal predecessors, (254), 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) [2023-12-19 18:21:38,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 254 transitions. [2023-12-19 18:21:38,501 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 254 transitions. Word has length 31 [2023-12-19 18:21:38,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:21:38,501 INFO L495 AbstractCegarLoop]: Abstraction has 190 states and 254 transitions. [2023-12-19 18:21:38,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.2325581395348837) internal successors, (53), 43 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:21:38,501 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 254 transitions. [2023-12-19 18:21:38,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-12-19 18:21:38,502 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:21:38,502 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:21:38,507 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-12-19 18:21:38,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-12-19 18:21:38,720 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:21:38,720 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:21:38,721 INFO L85 PathProgramCache]: Analyzing trace with hash -2115600766, now seen corresponding path program 19 times [2023-12-19 18:21:38,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:21:38,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491075853] [2023-12-19 18:21:38,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:21:38,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:21:38,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:21:39,557 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 18:21:39,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:21:39,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491075853] [2023-12-19 18:21:39,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491075853] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 18:21:39,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731287894] [2023-12-19 18:21:39,558 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-19 18:21:39,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:21:39,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:21:39,559 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 18:21:39,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-12-19 18:21:39,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:21:39,722 WARN L260 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 94 conjunts are in the unsatisfiable core [2023-12-19 18:21:39,723 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 18:21:41,114 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 18:21:41,114 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 18:21:42,612 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 18:21:42,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731287894] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 18:21:42,612 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 18:21:42,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 29, 21] total 67 [2023-12-19 18:21:42,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133781789] [2023-12-19 18:21:42,612 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 18:21:42,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2023-12-19 18:21:42,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:21:42,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2023-12-19 18:21:42,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=426, Invalid=4130, Unknown=0, NotChecked=0, Total=4556 [2023-12-19 18:21:42,613 INFO L87 Difference]: Start difference. First operand 190 states and 254 transitions. Second operand has 68 states, 68 states have (on average 1.338235294117647) internal successors, (91), 67 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) [2023-12-19 18:22:26,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:22:26,134 INFO L93 Difference]: Finished difference Result 345 states and 423 transitions. [2023-12-19 18:22:26,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2023-12-19 18:22:26,134 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 1.338235294117647) internal successors, (91), 67 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) Word has length 32 [2023-12-19 18:22:26,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:22:26,135 INFO L225 Difference]: With dead ends: 345 [2023-12-19 18:22:26,135 INFO L226 Difference]: Without dead ends: 287 [2023-12-19 18:22:26,136 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3068 ImplicationChecksByTransitivity, 41.9s TimeCoverageRelationStatistics Valid=1107, Invalid=10022, Unknown=1, NotChecked=0, Total=11130 [2023-12-19 18:22:26,137 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 164 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 1511 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 1623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 1511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2023-12-19 18:22:26,137 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 388 Invalid, 1623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 1511 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2023-12-19 18:22:26,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2023-12-19 18:22:26,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 180. [2023-12-19 18:22:26,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 1.3687150837988826) internal successors, (245), 179 states have internal predecessors, (245), 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) [2023-12-19 18:22:26,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 245 transitions. [2023-12-19 18:22:26,286 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 245 transitions. Word has length 32 [2023-12-19 18:22:26,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:22:26,286 INFO L495 AbstractCegarLoop]: Abstraction has 180 states and 245 transitions. [2023-12-19 18:22:26,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 1.338235294117647) internal successors, (91), 67 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) [2023-12-19 18:22:26,286 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 245 transitions. [2023-12-19 18:22:26,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-12-19 18:22:26,286 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:22:26,286 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:22:26,292 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-12-19 18:22:26,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-12-19 18:22:26,492 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:22:26,492 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:22:26,492 INFO L85 PathProgramCache]: Analyzing trace with hash 1702529360, now seen corresponding path program 20 times [2023-12-19 18:22:26,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:22:26,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056079179] [2023-12-19 18:22:26,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:22:26,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:22:26,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:22:26,776 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-12-19 18:22:26,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:22:26,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056079179] [2023-12-19 18:22:26,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056079179] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 18:22:26,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450023496] [2023-12-19 18:22:26,777 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-19 18:22:26,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:22:26,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:22:26,792 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 18:22:26,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-12-19 18:22:26,848 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-19 18:22:26,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 18:22:26,849 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 56 conjunts are in the unsatisfiable core [2023-12-19 18:22:26,850 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 18:22:27,031 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-12-19 18:22:27,031 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 18:22:27,467 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-12-19 18:22:27,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450023496] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 18:22:27,467 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 18:22:27,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 48 [2023-12-19 18:22:27,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012907729] [2023-12-19 18:22:27,468 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 18:22:27,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-12-19 18:22:27,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:22:27,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-12-19 18:22:27,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=293, Invalid=1963, Unknown=0, NotChecked=0, Total=2256 [2023-12-19 18:22:27,469 INFO L87 Difference]: Start difference. First operand 180 states and 245 transitions. Second operand has 48 states, 48 states have (on average 1.2083333333333333) internal successors, (58), 48 states have internal predecessors, (58), 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) [2023-12-19 18:22:33,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:22:33,809 INFO L93 Difference]: Finished difference Result 308 states and 403 transitions. [2023-12-19 18:22:33,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-12-19 18:22:33,809 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.2083333333333333) internal successors, (58), 48 states have internal predecessors, (58), 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 34 [2023-12-19 18:22:33,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:22:33,810 INFO L225 Difference]: With dead ends: 308 [2023-12-19 18:22:33,810 INFO L226 Difference]: Without dead ends: 239 [2023-12-19 18:22:33,810 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=464, Invalid=2958, Unknown=0, NotChecked=0, Total=3422 [2023-12-19 18:22:33,810 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 60 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 1101 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 1139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-12-19 18:22:33,811 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 193 Invalid, 1139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 1101 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-12-19 18:22:33,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2023-12-19 18:22:33,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 192. [2023-12-19 18:22:33,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 1.350785340314136) internal successors, (258), 191 states have internal predecessors, (258), 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) [2023-12-19 18:22:33,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 258 transitions. [2023-12-19 18:22:33,969 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 258 transitions. Word has length 34 [2023-12-19 18:22:33,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:22:33,969 INFO L495 AbstractCegarLoop]: Abstraction has 192 states and 258 transitions. [2023-12-19 18:22:33,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.2083333333333333) internal successors, (58), 48 states have internal predecessors, (58), 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) [2023-12-19 18:22:33,969 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 258 transitions. [2023-12-19 18:22:33,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-12-19 18:22:33,970 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:22:33,970 INFO L195 NwaCegarLoop]: trace histogram [18, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:22:33,975 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-12-19 18:22:34,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:22:34,174 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:22:34,175 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:22:34,175 INFO L85 PathProgramCache]: Analyzing trace with hash -1925962910, now seen corresponding path program 21 times [2023-12-19 18:22:34,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:22:34,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746798570] [2023-12-19 18:22:34,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:22:34,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:22:34,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:22:34,485 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 0 proven. 181 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-19 18:22:34,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:22:34,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746798570] [2023-12-19 18:22:34,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746798570] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 18:22:34,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837536242] [2023-12-19 18:22:34,486 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-19 18:22:34,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:22:34,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:22:34,487 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 18:22:34,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-12-19 18:22:35,388 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2023-12-19 18:22:35,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 18:22:35,391 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 49 conjunts are in the unsatisfiable core [2023-12-19 18:22:35,392 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 18:22:35,433 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 0 proven. 181 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-19 18:22:35,433 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 18:22:36,142 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 0 proven. 181 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-19 18:22:36,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837536242] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 18:22:36,142 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 18:22:36,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 50 [2023-12-19 18:22:36,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382272462] [2023-12-19 18:22:36,142 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 18:22:36,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-12-19 18:22:36,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:22:36,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-12-19 18:22:36,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=490, Invalid=2060, Unknown=0, NotChecked=0, Total=2550 [2023-12-19 18:22:36,143 INFO L87 Difference]: Start difference. First operand 192 states and 258 transitions. Second operand has 51 states, 51 states have (on average 1.1568627450980393) internal successors, (59), 50 states have internal predecessors, (59), 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) [2023-12-19 18:22:42,062 WARN L854 $PredicateComparison]: unable to prove that (and (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 14) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 7) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 10) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 1) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 4) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 4294967293) 4294967296)) (< 0 (mod |c_ULTIMATE.start_main_~y~0#1| 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 4294967295) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 6) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 2) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 4294967294) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 3) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 12) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 8) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 5) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 11) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 4294967292) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 9) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 13) 4294967296))) is different from false [2023-12-19 18:23:21,528 WARN L293 SmtUtils]: Spent 21.96s on a formula simplification. DAG size of input: 74 DAG size of output: 73 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-19 18:23:46,287 WARN L293 SmtUtils]: Spent 9.83s on a formula simplification. DAG size of input: 70 DAG size of output: 69 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-19 18:24:45,702 WARN L293 SmtUtils]: Spent 45.45s on a formula simplification. DAG size of input: 89 DAG size of output: 88 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-19 18:24:58,066 WARN L293 SmtUtils]: Spent 5.24s on a formula simplification. DAG size of input: 66 DAG size of output: 65 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-19 18:25:02,552 WARN L854 $PredicateComparison]: unable to prove that (and (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 7) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 10) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 1) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 4) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 4294967293) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~z~0#1| 4294967293) 4294967296)) (< 0 (mod |c_ULTIMATE.start_main_~y~0#1| 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 4294967295) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 6) 4294967296)) (< 0 (mod (+ 4294967294 |c_ULTIMATE.start_main_~z~0#1|) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 2) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 4294967294) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 3) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 12) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 8) 4294967296)) (< 0 (mod |c_ULTIMATE.start_main_~z~0#1| 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 5) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 11) 4294967296)) (< 0 (mod (+ 4294967295 |c_ULTIMATE.start_main_~z~0#1|) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 4294967292) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 9) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 13) 4294967296))) is different from false [2023-12-19 18:25:06,624 WARN L854 $PredicateComparison]: unable to prove that (and (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 7) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 10) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 1) 4294967296)) (< 0 (mod (+ 4294967292 |c_ULTIMATE.start_main_~z~0#1|) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 4) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 4294967293) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~z~0#1| 4294967293) 4294967296)) (< 0 (mod |c_ULTIMATE.start_main_~y~0#1| 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 4294967295) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 6) 4294967296)) (< 0 (mod (+ 4294967294 |c_ULTIMATE.start_main_~z~0#1|) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 2) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 4294967294) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 3) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 12) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 8) 4294967296)) (< 0 (mod |c_ULTIMATE.start_main_~z~0#1| 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 5) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 11) 4294967296)) (< 0 (mod (+ 4294967295 |c_ULTIMATE.start_main_~z~0#1|) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 4294967292) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 9) 4294967296))) is different from false [2023-12-19 18:25:29,591 WARN L293 SmtUtils]: Spent 8.18s on a formula simplification. DAG size of input: 62 DAG size of output: 61 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) Received shutdown request... [2023-12-19 18:26:35,281 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-19 18:26:35,305 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-19 18:26:36,313 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-12-19 18:26:36,482 WARN L435 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forcibly destroying the process [2023-12-19 18:26:36,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2023-12-19 18:26:36,493 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 3354 ImplicationChecksByTransitivity, 177.4s TimeCoverageRelationStatistics Valid=3082, Invalid=13179, Unknown=7, NotChecked=762, Total=17030 [2023-12-19 18:26:36,493 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 1041 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 1305 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1041 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 1629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 1305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 174 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-12-19 18:26:36,493 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1041 Valid, 319 Invalid, 1629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 1305 Invalid, 0 Unknown, 174 Unchecked, 1.4s Time] [2023-12-19 18:26:36,494 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-19 18:26:36,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-12-19 18:26:36,494 WARN L619 AbstractCegarLoop]: Verification canceled: while NwaCegarLoop was constructing difference of abstraction (192states) and FLOYD_HOARE automaton (currently 102 states, 51 states before enhancement),while PredicateUnifier was unifying predicates,while executing Executor. [2023-12-19 18:26:36,497 INFO L445 BasicCegarLoop]: Path program histogram: [21, 2, 1] [2023-12-19 18:26:36,499 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-19 18:26:36,500 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.12 06:26:36 BoogieIcfgContainer [2023-12-19 18:26:36,500 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-19 18:26:36,500 INFO L158 Benchmark]: Toolchain (without parser) took 879933.89ms. Allocated memory was 212.9MB in the beginning and 383.8MB in the end (delta: 170.9MB). Free memory was 172.6MB in the beginning and 328.8MB in the end (delta: -156.2MB). Peak memory consumption was 222.8MB. Max. memory is 8.0GB. [2023-12-19 18:26:36,500 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 212.9MB. Free memory is still 164.4MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-19 18:26:36,500 INFO L158 Benchmark]: CACSL2BoogieTranslator took 164.60ms. Allocated memory is still 212.9MB. Free memory was 172.6MB in the beginning and 161.6MB in the end (delta: 10.9MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-12-19 18:26:36,500 INFO L158 Benchmark]: Boogie Procedure Inliner took 17.94ms. Allocated memory is still 212.9MB. Free memory was 161.6MB in the beginning and 160.1MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-12-19 18:26:36,501 INFO L158 Benchmark]: Boogie Preprocessor took 18.29ms. Allocated memory is still 212.9MB. Free memory was 160.1MB in the beginning and 158.5MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-19 18:26:36,501 INFO L158 Benchmark]: RCFGBuilder took 298.75ms. Allocated memory is still 212.9MB. Free memory was 158.5MB in the beginning and 148.0MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2023-12-19 18:26:36,501 INFO L158 Benchmark]: TraceAbstraction took 879427.57ms. Allocated memory was 212.9MB in the beginning and 383.8MB in the end (delta: 170.9MB). Free memory was 147.6MB in the beginning and 328.8MB in the end (delta: -181.2MB). Peak memory consumption was 197.6MB. Max. memory is 8.0GB. [2023-12-19 18:26:36,501 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 212.9MB. Free memory is still 164.4MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 164.60ms. Allocated memory is still 212.9MB. Free memory was 172.6MB in the beginning and 161.6MB in the end (delta: 10.9MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 17.94ms. Allocated memory is still 212.9MB. Free memory was 161.6MB in the beginning and 160.1MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 18.29ms. Allocated memory is still 212.9MB. Free memory was 160.1MB in the beginning and 158.5MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 298.75ms. Allocated memory is still 212.9MB. Free memory was 158.5MB in the beginning and 148.0MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * TraceAbstraction took 879427.57ms. Allocated memory was 212.9MB in the beginning and 383.8MB in the end (delta: 170.9MB). Free memory was 147.6MB in the beginning and 328.8MB in the end (delta: -181.2MB). Peak memory consumption was 197.6MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 7]: Timeout (TraceAbstraction) Unable to prove that a call to reach_error is unreachable (line 7). Cancelled while NwaCegarLoop was constructing difference of abstraction (192states) and FLOYD_HOARE automaton (currently 102 states, 51 states before enhancement),while PredicateUnifier was unifying predicates,while executing Executor. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 11 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 879.4s, OverallIterations: 24, TraceHistogramMax: 18, PathProgramHistogramMax: 21, EmptinessCheckTime: 0.0s, AutomataDifference: 847.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 5026 SdHoareTripleChecker+Valid, 24.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 5026 mSDsluCounter, 3790 SdHoareTripleChecker+Invalid, 22.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 174 IncrementalHoareTripleChecker+Unchecked, 3541 mSDsCounter, 2419 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 14025 IncrementalHoareTripleChecker+Invalid, 16618 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2419 mSolverCounterUnsat, 249 mSDtfsCounter, 14025 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2032 GetRequests, 575 SyntacticMatches, 7 SemanticMatches, 1449 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 45812 ImplicationChecksByTransitivity, 772.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=192occurred in iteration=23, InterpolantAutomatonStates: 1054, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.4s AutomataMinimizationTime, 23 MinimizatonAttempts, 1458 StatesRemovedByMinimization, 22 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 2.4s SatisfiabilityAnalysisTime, 22.1s InterpolantComputationTime, 1008 NumberOfCodeBlocks, 1008 NumberOfCodeBlocksAsserted, 92 NumberOfCheckSat, 1438 ConstructedInterpolants, 0 QuantifiedInterpolants, 12636 SizeOfPredicates, 44 NumberOfNonLiveVariables, 2431 ConjunctsInSsa, 911 ConjunctsInUnsatCore, 70 InterpolantComputations, 1 PerfectInterpolantSequences, 618/3744 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown