/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/recursified_nla-digbench/recursified_sqrt1-ll.c -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-20 00:33:03,842 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-20 00:33:03,877 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-20 00:33:03,880 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-20 00:33:03,880 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-20 00:33:03,893 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-20 00:33:03,893 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-20 00:33:03,894 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-20 00:33:03,894 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-20 00:33:03,894 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-20 00:33:03,895 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-20 00:33:03,895 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-20 00:33:03,895 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-20 00:33:03,895 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-20 00:33:03,895 INFO L153 SettingsManager]: * Use SBE=true [2023-12-20 00:33:03,896 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-20 00:33:03,896 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-20 00:33:03,896 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-20 00:33:03,896 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-20 00:33:03,897 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-20 00:33:03,897 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-20 00:33:03,897 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-20 00:33:03,897 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-20 00:33:03,897 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-20 00:33:03,898 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-20 00:33:03,898 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-20 00:33:03,898 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-20 00:33:03,898 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-20 00:33:03,898 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-20 00:33:03,899 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-20 00:33:03,899 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-20 00:33:03,899 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-20 00:33:03,899 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-20 00:33:03,899 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-20 00:33:03,899 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-20 00:33:03,899 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-20 00:33:03,900 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-20 00:33:03,900 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-20 00:33:03,900 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-20 00:33:03,900 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-20 00:33:03,900 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-20 00:33:03,900 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-20 00:33:03,901 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-20 00:33:03,901 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> true [2023-12-20 00:33:04,077 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-20 00:33:04,094 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-20 00:33:04,096 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-20 00:33:04,096 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-20 00:33:04,097 INFO L274 PluginConnector]: CDTParser initialized [2023-12-20 00:33:04,097 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursified_nla-digbench/recursified_sqrt1-ll.c [2023-12-20 00:33:05,085 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-20 00:33:05,235 INFO L384 CDTParser]: Found 1 translation units. [2023-12-20 00:33:05,235 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursified_nla-digbench/recursified_sqrt1-ll.c [2023-12-20 00:33:05,240 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/937558996/38a45111f83047cf8f33ad1d0b275ec5/FLAG4e5e723c4 [2023-12-20 00:33:05,249 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/937558996/38a45111f83047cf8f33ad1d0b275ec5 [2023-12-20 00:33:05,252 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-20 00:33:05,254 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-20 00:33:05,256 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-20 00:33:05,256 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-20 00:33:05,260 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-20 00:33:05,260 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.12 12:33:05" (1/1) ... [2023-12-20 00:33:05,261 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e61d8bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 12:33:05, skipping insertion in model container [2023-12-20 00:33:05,261 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.12 12:33:05" (1/1) ... [2023-12-20 00:33:05,277 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-20 00:33:05,384 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursified_nla-digbench/recursified_sqrt1-ll.c[1052,1065] [2023-12-20 00:33:05,395 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-20 00:33:05,408 INFO L202 MainTranslator]: Completed pre-run [2023-12-20 00:33:05,415 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursified_nla-digbench/recursified_sqrt1-ll.c[1052,1065] [2023-12-20 00:33:05,421 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-20 00:33:05,430 INFO L206 MainTranslator]: Completed translation [2023-12-20 00:33:05,430 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 12:33:05 WrapperNode [2023-12-20 00:33:05,430 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-20 00:33:05,431 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-20 00:33:05,431 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-20 00:33:05,431 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-20 00:33:05,435 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 12:33:05" (1/1) ... [2023-12-20 00:33:05,440 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 12:33:05" (1/1) ... [2023-12-20 00:33:05,450 INFO L138 Inliner]: procedures = 16, calls = 58, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 60 [2023-12-20 00:33:05,450 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-20 00:33:05,451 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-20 00:33:05,451 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-20 00:33:05,451 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-20 00:33:05,457 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 12:33:05" (1/1) ... [2023-12-20 00:33:05,457 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 12:33:05" (1/1) ... [2023-12-20 00:33:05,458 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 12:33:05" (1/1) ... [2023-12-20 00:33:05,466 INFO L175 MemorySlicer]: Split 33 memory accesses to 5 slices as follows [2, 9, 12, 8, 2]. 36 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 7 writes are split as follows [0, 2, 2, 2, 1]. [2023-12-20 00:33:05,467 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 12:33:05" (1/1) ... [2023-12-20 00:33:05,467 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 12:33:05" (1/1) ... [2023-12-20 00:33:05,470 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 12:33:05" (1/1) ... [2023-12-20 00:33:05,471 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 12:33:05" (1/1) ... [2023-12-20 00:33:05,472 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 12:33:05" (1/1) ... [2023-12-20 00:33:05,473 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 12:33:05" (1/1) ... [2023-12-20 00:33:05,474 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-20 00:33:05,475 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-20 00:33:05,475 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-20 00:33:05,475 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-20 00:33:05,476 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 12:33:05" (1/1) ... [2023-12-20 00:33:05,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-20 00:33:05,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 00:33:05,500 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) [2023-12-20 00:33:05,513 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 [2023-12-20 00:33:05,519 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-20 00:33:05,519 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-20 00:33:05,519 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-12-20 00:33:05,519 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-12-20 00:33:05,519 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-12-20 00:33:05,519 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-12-20 00:33:05,519 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-20 00:33:05,519 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-12-20 00:33:05,519 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-12-20 00:33:05,520 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-12-20 00:33:05,520 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-12-20 00:33:05,520 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-12-20 00:33:05,520 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_29_to_40_0 [2023-12-20 00:33:05,520 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_29_to_40_0 [2023-12-20 00:33:05,520 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-20 00:33:05,520 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-20 00:33:05,520 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-12-20 00:33:05,520 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-12-20 00:33:05,520 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-12-20 00:33:05,520 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-12-20 00:33:05,521 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-12-20 00:33:05,521 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-12-20 00:33:05,521 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-12-20 00:33:05,521 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-20 00:33:05,578 INFO L241 CfgBuilder]: Building ICFG [2023-12-20 00:33:05,579 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-20 00:33:05,698 INFO L282 CfgBuilder]: Performing block encoding [2023-12-20 00:33:05,715 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-20 00:33:05,715 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-12-20 00:33:05,716 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.12 12:33:05 BoogieIcfgContainer [2023-12-20 00:33:05,716 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-20 00:33:05,717 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-20 00:33:05,717 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-20 00:33:05,720 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-20 00:33:05,721 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.12 12:33:05" (1/3) ... [2023-12-20 00:33:05,721 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3848d35e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.12 12:33:05, skipping insertion in model container [2023-12-20 00:33:05,721 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 12:33:05" (2/3) ... [2023-12-20 00:33:05,721 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3848d35e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.12 12:33:05, skipping insertion in model container [2023-12-20 00:33:05,721 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.12 12:33:05" (3/3) ... [2023-12-20 00:33:05,722 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_sqrt1-ll.c [2023-12-20 00:33:05,733 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-20 00:33:05,733 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-20 00:33:05,759 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-20 00:33:05,763 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;@5069d484, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-20 00:33:05,763 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-20 00:33:05,765 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 16 states have (on average 1.25) internal successors, (20), 18 states have internal predecessors, (20), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-12-20 00:33:05,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-12-20 00:33:05,769 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 00:33:05,769 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 00:33:05,770 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 00:33:05,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 00:33:05,777 INFO L85 PathProgramCache]: Analyzing trace with hash -1408384077, now seen corresponding path program 1 times [2023-12-20 00:33:05,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 00:33:05,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467093561] [2023-12-20 00:33:05,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 00:33:05,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 00:33:05,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:33:06,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 00:33:06,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 00:33:06,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467093561] [2023-12-20 00:33:06,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467093561] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 00:33:06,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 00:33:06,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-20 00:33:06,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268458241] [2023-12-20 00:33:06,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 00:33:06,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-20 00:33:06,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 00:33:06,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-20 00:33:06,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-12-20 00:33:06,385 INFO L87 Difference]: Start difference. First operand has 28 states, 16 states have (on average 1.25) internal successors, (20), 18 states have internal predecessors, (20), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 8 states, 6 states have (on average 1.0) internal successors, (6), 5 states have internal predecessors, (6), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 00:33:06,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 00:33:06,551 INFO L93 Difference]: Finished difference Result 76 states and 113 transitions. [2023-12-20 00:33:06,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-20 00:33:06,553 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.0) internal successors, (6), 5 states have internal predecessors, (6), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-12-20 00:33:06,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 00:33:06,557 INFO L225 Difference]: With dead ends: 76 [2023-12-20 00:33:06,558 INFO L226 Difference]: Without dead ends: 47 [2023-12-20 00:33:06,560 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-12-20 00:33:06,561 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 22 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 00:33:06,562 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 106 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 00:33:06,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-12-20 00:33:06,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 41. [2023-12-20 00:33:06,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 25 states have (on average 1.12) internal successors, (28), 27 states have internal predecessors, (28), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2023-12-20 00:33:06,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 50 transitions. [2023-12-20 00:33:06,588 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 50 transitions. Word has length 8 [2023-12-20 00:33:06,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 00:33:06,589 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 50 transitions. [2023-12-20 00:33:06,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.0) internal successors, (6), 5 states have internal predecessors, (6), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 00:33:06,589 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 50 transitions. [2023-12-20 00:33:06,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-12-20 00:33:06,590 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 00:33:06,590 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 00:33:06,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-20 00:33:06,591 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 00:33:06,591 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 00:33:06,591 INFO L85 PathProgramCache]: Analyzing trace with hash 1735781632, now seen corresponding path program 1 times [2023-12-20 00:33:06,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 00:33:06,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700933190] [2023-12-20 00:33:06,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 00:33:06,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 00:33:06,608 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 00:33:06,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [392523664] [2023-12-20 00:33:06,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 00:33:06,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 00:33:06,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 00:33:06,611 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) [2023-12-20 00:33:06,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-20 00:33:06,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:33:06,681 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 67 conjunts are in the unsatisfiable core [2023-12-20 00:33:06,686 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 00:33:06,719 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 00:33:06,725 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 00:33:06,730 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 00:33:06,995 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 00:33:06,995 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 00:33:07,258 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 00:33:07,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 00:33:07,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700933190] [2023-12-20 00:33:07,258 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 00:33:07,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392523664] [2023-12-20 00:33:07,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392523664] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 00:33:07,259 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-20 00:33:07,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 23 [2023-12-20 00:33:07,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034274215] [2023-12-20 00:33:07,259 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-20 00:33:07,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-12-20 00:33:07,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 00:33:07,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-12-20 00:33:07,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=428, Unknown=1, NotChecked=0, Total=506 [2023-12-20 00:33:07,261 INFO L87 Difference]: Start difference. First operand 41 states and 50 transitions. Second operand has 23 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 15 states have internal predecessors, (19), 6 states have call successors, (6), 6 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-20 00:33:11,640 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-12-20 00:33:19,720 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-12-20 00:33:20,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 00:33:20,009 INFO L93 Difference]: Finished difference Result 68 states and 81 transitions. [2023-12-20 00:33:20,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-12-20 00:33:20,010 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 15 states have internal predecessors, (19), 6 states have call successors, (6), 6 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 14 [2023-12-20 00:33:20,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 00:33:20,011 INFO L225 Difference]: With dead ends: 68 [2023-12-20 00:33:20,011 INFO L226 Difference]: Without dead ends: 66 [2023-12-20 00:33:20,012 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=197, Invalid=991, Unknown=2, NotChecked=0, Total=1190 [2023-12-20 00:33:20,013 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 72 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 42 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.4s IncrementalHoareTripleChecker+Time [2023-12-20 00:33:20,013 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 94 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 296 Invalid, 2 Unknown, 0 Unchecked, 8.4s Time] [2023-12-20 00:33:20,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2023-12-20 00:33:20,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 61. [2023-12-20 00:33:20,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 38 states have (on average 1.105263157894737) internal successors, (42), 40 states have internal predecessors, (42), 14 states have call successors, (14), 7 states have call predecessors, (14), 8 states have return successors, (14), 13 states have call predecessors, (14), 12 states have call successors, (14) [2023-12-20 00:33:20,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 70 transitions. [2023-12-20 00:33:20,025 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 70 transitions. Word has length 14 [2023-12-20 00:33:20,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 00:33:20,026 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 70 transitions. [2023-12-20 00:33:20,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 15 states have internal predecessors, (19), 6 states have call successors, (6), 6 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-20 00:33:20,026 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 70 transitions. [2023-12-20 00:33:20,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-12-20 00:33:20,027 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 00:33:20,028 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 00:33:20,035 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-20 00:33:20,235 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 [2023-12-20 00:33:20,238 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 00:33:20,238 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 00:33:20,238 INFO L85 PathProgramCache]: Analyzing trace with hash -1054740085, now seen corresponding path program 1 times [2023-12-20 00:33:20,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 00:33:20,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249062706] [2023-12-20 00:33:20,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 00:33:20,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 00:33:20,254 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 00:33:20,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [922549171] [2023-12-20 00:33:20,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 00:33:20,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 00:33:20,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 00:33:20,266 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) [2023-12-20 00:33:20,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-20 00:33:20,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:33:20,329 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 53 conjunts are in the unsatisfiable core [2023-12-20 00:33:20,333 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 00:33:20,340 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 00:33:20,345 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 00:33:20,554 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-20 00:33:20,554 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 00:33:20,719 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-20 00:33:20,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 00:33:20,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249062706] [2023-12-20 00:33:20,720 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 00:33:20,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922549171] [2023-12-20 00:33:20,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922549171] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-20 00:33:20,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-20 00:33:20,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 17 [2023-12-20 00:33:20,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747428930] [2023-12-20 00:33:20,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 00:33:20,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-20 00:33:20,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 00:33:20,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-20 00:33:20,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2023-12-20 00:33:20,722 INFO L87 Difference]: Start difference. First operand 61 states and 70 transitions. Second operand has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-20 00:33:21,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 00:33:21,288 INFO L93 Difference]: Finished difference Result 73 states and 82 transitions. [2023-12-20 00:33:21,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-20 00:33:21,289 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2023-12-20 00:33:21,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 00:33:21,290 INFO L225 Difference]: With dead ends: 73 [2023-12-20 00:33:21,290 INFO L226 Difference]: Without dead ends: 71 [2023-12-20 00:33:21,290 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2023-12-20 00:33:21,291 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 19 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-20 00:33:21,291 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 91 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-20 00:33:21,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2023-12-20 00:33:21,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 69. [2023-12-20 00:33:21,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 44 states have (on average 1.0909090909090908) internal successors, (48), 46 states have internal predecessors, (48), 14 states have call successors, (14), 9 states have call predecessors, (14), 10 states have return successors, (14), 13 states have call predecessors, (14), 12 states have call successors, (14) [2023-12-20 00:33:21,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 76 transitions. [2023-12-20 00:33:21,302 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 76 transitions. Word has length 20 [2023-12-20 00:33:21,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 00:33:21,302 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 76 transitions. [2023-12-20 00:33:21,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-20 00:33:21,302 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 76 transitions. [2023-12-20 00:33:21,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-12-20 00:33:21,303 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 00:33:21,303 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 00:33:21,308 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-20 00:33:21,508 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 [2023-12-20 00:33:21,508 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 00:33:21,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 00:33:21,510 INFO L85 PathProgramCache]: Analyzing trace with hash 1398908834, now seen corresponding path program 1 times [2023-12-20 00:33:21,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 00:33:21,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798075036] [2023-12-20 00:33:21,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 00:33:21,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 00:33:21,526 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 00:33:21,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1502161176] [2023-12-20 00:33:21,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 00:33:21,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 00:33:21,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 00:33:21,528 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) [2023-12-20 00:33:21,554 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-20 00:33:21,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:33:21,604 INFO L262 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 71 conjunts are in the unsatisfiable core [2023-12-20 00:33:21,611 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 00:33:21,615 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 00:33:21,620 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 00:33:21,829 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-20 00:33:21,833 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-20 00:33:21,916 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-20 00:33:21,917 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 00:33:22,047 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-12-20 00:33:22,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 00:33:22,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798075036] [2023-12-20 00:33:22,048 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 00:33:22,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502161176] [2023-12-20 00:33:22,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502161176] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 00:33:22,048 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-20 00:33:22,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 19 [2023-12-20 00:33:22,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297375597] [2023-12-20 00:33:22,049 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-20 00:33:22,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-12-20 00:33:22,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 00:33:22,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-12-20 00:33:22,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2023-12-20 00:33:22,058 INFO L87 Difference]: Start difference. First operand 69 states and 76 transitions. Second operand has 19 states, 15 states have (on average 2.066666666666667) internal successors, (31), 14 states have internal predecessors, (31), 7 states have call successors, (12), 7 states have call predecessors, (12), 3 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-20 00:33:22,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 00:33:22,568 INFO L93 Difference]: Finished difference Result 93 states and 104 transitions. [2023-12-20 00:33:22,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-12-20 00:33:22,568 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 15 states have (on average 2.066666666666667) internal successors, (31), 14 states have internal predecessors, (31), 7 states have call successors, (12), 7 states have call predecessors, (12), 3 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 30 [2023-12-20 00:33:22,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 00:33:22,569 INFO L225 Difference]: With dead ends: 93 [2023-12-20 00:33:22,569 INFO L226 Difference]: Without dead ends: 91 [2023-12-20 00:33:22,570 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 36 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=127, Invalid=685, Unknown=0, NotChecked=0, Total=812 [2023-12-20 00:33:22,571 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 70 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 367 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-20 00:33:22,571 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 155 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 367 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-20 00:33:22,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2023-12-20 00:33:22,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 77. [2023-12-20 00:33:22,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 52 states have internal predecessors, (53), 15 states have call successors, (15), 10 states have call predecessors, (15), 12 states have return successors, (19), 15 states have call predecessors, (19), 14 states have call successors, (19) [2023-12-20 00:33:22,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 87 transitions. [2023-12-20 00:33:22,586 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 87 transitions. Word has length 30 [2023-12-20 00:33:22,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 00:33:22,587 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 87 transitions. [2023-12-20 00:33:22,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 15 states have (on average 2.066666666666667) internal successors, (31), 14 states have internal predecessors, (31), 7 states have call successors, (12), 7 states have call predecessors, (12), 3 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-20 00:33:22,587 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 87 transitions. [2023-12-20 00:33:22,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-12-20 00:33:22,587 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 00:33:22,587 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 00:33:22,594 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-20 00:33:22,792 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 [2023-12-20 00:33:22,793 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 00:33:22,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 00:33:22,793 INFO L85 PathProgramCache]: Analyzing trace with hash -1438102184, now seen corresponding path program 1 times [2023-12-20 00:33:22,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 00:33:22,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335380982] [2023-12-20 00:33:22,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 00:33:22,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 00:33:22,812 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 00:33:22,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [683633614] [2023-12-20 00:33:22,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 00:33:22,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 00:33:22,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 00:33:22,822 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) [2023-12-20 00:33:22,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-20 00:33:22,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:33:22,888 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 20 conjunts are in the unsatisfiable core [2023-12-20 00:33:22,890 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 00:33:22,894 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 00:33:22,897 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 00:33:22,992 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-20 00:33:22,992 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-20 00:33:22,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 00:33:22,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335380982] [2023-12-20 00:33:22,992 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 00:33:22,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683633614] [2023-12-20 00:33:22,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683633614] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 00:33:22,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 00:33:22,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-20 00:33:22,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833496001] [2023-12-20 00:33:22,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 00:33:22,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-20 00:33:22,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 00:33:22,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-20 00:33:22,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-20 00:33:22,995 INFO L87 Difference]: Start difference. First operand 77 states and 87 transitions. Second operand has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-20 00:33:23,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 00:33:23,146 INFO L93 Difference]: Finished difference Result 91 states and 102 transitions. [2023-12-20 00:33:23,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-20 00:33:23,147 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2023-12-20 00:33:23,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 00:33:23,147 INFO L225 Difference]: With dead ends: 91 [2023-12-20 00:33:23,147 INFO L226 Difference]: Without dead ends: 89 [2023-12-20 00:33:23,148 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-12-20 00:33:23,148 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 13 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 00:33:23,148 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 52 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 00:33:23,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2023-12-20 00:33:23,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 85. [2023-12-20 00:33:23,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 57 states have internal predecessors, (58), 16 states have call successors, (16), 11 states have call predecessors, (16), 14 states have return successors, (21), 16 states have call predecessors, (21), 15 states have call successors, (21) [2023-12-20 00:33:23,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 95 transitions. [2023-12-20 00:33:23,161 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 95 transitions. Word has length 30 [2023-12-20 00:33:23,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 00:33:23,161 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 95 transitions. [2023-12-20 00:33:23,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-20 00:33:23,161 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 95 transitions. [2023-12-20 00:33:23,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-12-20 00:33:23,162 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 00:33:23,162 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 00:33:23,173 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-20 00:33:23,366 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 [2023-12-20 00:33:23,367 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 00:33:23,367 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 00:33:23,367 INFO L85 PathProgramCache]: Analyzing trace with hash -1300709659, now seen corresponding path program 1 times [2023-12-20 00:33:23,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 00:33:23,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89091245] [2023-12-20 00:33:23,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 00:33:23,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 00:33:23,375 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 00:33:23,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [817205695] [2023-12-20 00:33:23,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 00:33:23,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 00:33:23,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 00:33:23,376 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) [2023-12-20 00:33:23,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-20 00:33:23,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:33:23,440 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 37 conjunts are in the unsatisfiable core [2023-12-20 00:33:23,442 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 00:33:23,447 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 00:33:23,451 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 00:33:23,455 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 00:33:23,666 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-20 00:33:23,667 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 00:33:28,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 00:33:28,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89091245] [2023-12-20 00:33:28,246 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 00:33:28,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817205695] [2023-12-20 00:33:28,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817205695] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 00:33:28,246 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-20 00:33:28,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2023-12-20 00:33:28,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003671093] [2023-12-20 00:33:28,246 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-20 00:33:28,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-20 00:33:28,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 00:33:28,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-20 00:33:28,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=349, Unknown=1, NotChecked=0, Total=420 [2023-12-20 00:33:28,247 INFO L87 Difference]: Start difference. First operand 85 states and 95 transitions. Second operand has 12 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-12-20 00:33:28,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 00:33:28,665 INFO L93 Difference]: Finished difference Result 101 states and 110 transitions. [2023-12-20 00:33:28,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-20 00:33:28,666 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 36 [2023-12-20 00:33:28,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 00:33:28,667 INFO L225 Difference]: With dead ends: 101 [2023-12-20 00:33:28,667 INFO L226 Difference]: Without dead ends: 97 [2023-12-20 00:33:28,667 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=143, Invalid=612, Unknown=1, NotChecked=0, Total=756 [2023-12-20 00:33:28,668 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 32 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-20 00:33:28,668 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 66 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-20 00:33:28,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2023-12-20 00:33:28,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 95. [2023-12-20 00:33:28,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 61 states have (on average 1.0655737704918034) internal successors, (65), 63 states have internal predecessors, (65), 18 states have call successors, (18), 13 states have call predecessors, (18), 15 states have return successors, (22), 18 states have call predecessors, (22), 16 states have call successors, (22) [2023-12-20 00:33:28,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 105 transitions. [2023-12-20 00:33:28,698 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 105 transitions. Word has length 36 [2023-12-20 00:33:28,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 00:33:28,698 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 105 transitions. [2023-12-20 00:33:28,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-12-20 00:33:28,699 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 105 transitions. [2023-12-20 00:33:28,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-12-20 00:33:28,699 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 00:33:28,699 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 00:33:28,724 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-20 00:33:28,904 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 [2023-12-20 00:33:28,905 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 00:33:28,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 00:33:28,905 INFO L85 PathProgramCache]: Analyzing trace with hash -1658463312, now seen corresponding path program 1 times [2023-12-20 00:33:28,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 00:33:28,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202569616] [2023-12-20 00:33:28,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 00:33:28,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 00:33:28,913 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 00:33:28,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2087536765] [2023-12-20 00:33:28,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 00:33:28,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 00:33:28,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 00:33:28,916 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) [2023-12-20 00:33:28,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-20 00:33:29,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:33:29,011 INFO L262 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 75 conjunts are in the unsatisfiable core [2023-12-20 00:33:29,016 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 00:33:29,023 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 00:33:29,027 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-20 00:33:29,028 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 00:33:29,537 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 35 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-20 00:33:29,537 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 00:33:35,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 00:33:35,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202569616] [2023-12-20 00:33:35,232 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 00:33:35,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087536765] [2023-12-20 00:33:35,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087536765] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 00:33:35,232 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-20 00:33:35,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2023-12-20 00:33:35,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095816186] [2023-12-20 00:33:35,233 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-20 00:33:35,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-20 00:33:35,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 00:33:35,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-20 00:33:35,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=610, Unknown=1, NotChecked=0, Total=702 [2023-12-20 00:33:35,234 INFO L87 Difference]: Start difference. First operand 95 states and 105 transitions. Second operand has 18 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 6 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2023-12-20 00:33:36,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 00:33:36,544 INFO L93 Difference]: Finished difference Result 97 states and 106 transitions. [2023-12-20 00:33:36,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-12-20 00:33:36,544 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 6 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 42 [2023-12-20 00:33:36,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 00:33:36,545 INFO L225 Difference]: With dead ends: 97 [2023-12-20 00:33:36,545 INFO L226 Difference]: Without dead ends: 77 [2023-12-20 00:33:36,545 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=240, Invalid=1480, Unknown=2, NotChecked=0, Total=1722 [2023-12-20 00:33:36,546 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 45 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 333 mSolverCounterSat, 36 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 333 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-20 00:33:36,546 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 61 Invalid, 374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 333 Invalid, 5 Unknown, 0 Unchecked, 0.3s Time] [2023-12-20 00:33:36,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2023-12-20 00:33:36,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2023-12-20 00:33:36,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 49 states have (on average 1.0612244897959184) internal successors, (52), 51 states have internal predecessors, (52), 15 states have call successors, (15), 10 states have call predecessors, (15), 12 states have return successors, (19), 15 states have call predecessors, (19), 14 states have call successors, (19) [2023-12-20 00:33:36,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 86 transitions. [2023-12-20 00:33:36,556 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 86 transitions. Word has length 42 [2023-12-20 00:33:36,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 00:33:36,556 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 86 transitions. [2023-12-20 00:33:36,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 6 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2023-12-20 00:33:36,556 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 86 transitions. [2023-12-20 00:33:36,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-12-20 00:33:36,557 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 00:33:36,557 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 00:33:36,567 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-12-20 00:33:36,767 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 [2023-12-20 00:33:36,767 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 00:33:36,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 00:33:36,768 INFO L85 PathProgramCache]: Analyzing trace with hash 983693574, now seen corresponding path program 1 times [2023-12-20 00:33:36,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 00:33:36,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887624374] [2023-12-20 00:33:36,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 00:33:36,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 00:33:36,778 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 00:33:36,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [11858067] [2023-12-20 00:33:36,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 00:33:36,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 00:33:36,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 00:33:36,796 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) [2023-12-20 00:33:36,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-20 00:33:36,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:33:36,890 INFO L262 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 50 conjunts are in the unsatisfiable core [2023-12-20 00:33:36,899 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 00:33:36,902 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 00:33:36,905 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 00:33:37,134 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-20 00:33:37,138 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-20 00:33:37,179 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2023-12-20 00:33:37,179 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 00:33:37,393 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-12-20 00:33:37,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 00:33:37,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887624374] [2023-12-20 00:33:37,460 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 00:33:37,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11858067] [2023-12-20 00:33:37,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11858067] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 00:33:37,460 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-20 00:33:37,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2023-12-20 00:33:37,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115306983] [2023-12-20 00:33:37,460 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-20 00:33:37,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-20 00:33:37,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 00:33:37,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-20 00:33:37,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2023-12-20 00:33:37,461 INFO L87 Difference]: Start difference. First operand 77 states and 86 transitions. Second operand has 10 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-12-20 00:33:37,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 00:33:37,679 INFO L93 Difference]: Finished difference Result 89 states and 99 transitions. [2023-12-20 00:33:37,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-20 00:33:37,680 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 54 [2023-12-20 00:33:37,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 00:33:37,681 INFO L225 Difference]: With dead ends: 89 [2023-12-20 00:33:37,681 INFO L226 Difference]: Without dead ends: 87 [2023-12-20 00:33:37,681 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2023-12-20 00:33:37,681 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 15 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-20 00:33:37,681 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 58 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-20 00:33:37,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2023-12-20 00:33:37,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 83. [2023-12-20 00:33:37,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 53 states have (on average 1.0566037735849056) internal successors, (56), 55 states have internal predecessors, (56), 16 states have call successors, (16), 11 states have call predecessors, (16), 13 states have return successors, (20), 16 states have call predecessors, (20), 15 states have call successors, (20) [2023-12-20 00:33:37,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 92 transitions. [2023-12-20 00:33:37,718 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 92 transitions. Word has length 54 [2023-12-20 00:33:37,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 00:33:37,718 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 92 transitions. [2023-12-20 00:33:37,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-12-20 00:33:37,718 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 92 transitions. [2023-12-20 00:33:37,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-12-20 00:33:37,720 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 00:33:37,720 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 00:33:37,725 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-12-20 00:33:37,925 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 [2023-12-20 00:33:37,925 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 00:33:37,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 00:33:37,926 INFO L85 PathProgramCache]: Analyzing trace with hash -1709019117, now seen corresponding path program 1 times [2023-12-20 00:33:37,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 00:33:37,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811013501] [2023-12-20 00:33:37,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 00:33:37,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 00:33:37,934 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 00:33:37,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1657793715] [2023-12-20 00:33:37,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 00:33:37,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 00:33:37,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 00:33:37,936 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) [2023-12-20 00:33:37,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-20 00:33:38,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:33:38,021 INFO L262 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 102 conjunts are in the unsatisfiable core [2023-12-20 00:33:38,024 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 00:33:38,027 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 00:33:38,032 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 00:33:38,258 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-20 00:33:38,588 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-20 00:33:38,596 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-20 00:33:38,831 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 63 proven. 18 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-12-20 00:33:38,831 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 00:33:44,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 00:33:44,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811013501] [2023-12-20 00:33:44,949 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 00:33:44,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657793715] [2023-12-20 00:33:44,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657793715] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 00:33:44,949 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-20 00:33:44,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2023-12-20 00:33:44,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665157913] [2023-12-20 00:33:44,951 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-20 00:33:44,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-12-20 00:33:44,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 00:33:44,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-12-20 00:33:44,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=932, Unknown=1, NotChecked=0, Total=1056 [2023-12-20 00:33:44,953 INFO L87 Difference]: Start difference. First operand 83 states and 92 transitions. Second operand has 23 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 8 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (9), 6 states have call predecessors, (9), 7 states have call successors, (9) [2023-12-20 00:33:46,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 00:33:46,444 INFO L93 Difference]: Finished difference Result 99 states and 107 transitions. [2023-12-20 00:33:46,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-12-20 00:33:46,444 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 8 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (9), 6 states have call predecessors, (9), 7 states have call successors, (9) Word has length 60 [2023-12-20 00:33:46,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 00:33:46,445 INFO L225 Difference]: With dead ends: 99 [2023-12-20 00:33:46,445 INFO L226 Difference]: Without dead ends: 95 [2023-12-20 00:33:46,446 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=348, Invalid=2407, Unknown=1, NotChecked=0, Total=2756 [2023-12-20 00:33:46,446 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 68 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 46 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-20 00:33:46,446 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 78 Invalid, 543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 490 Invalid, 7 Unknown, 0 Unchecked, 0.7s Time] [2023-12-20 00:33:46,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2023-12-20 00:33:46,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 93. [2023-12-20 00:33:46,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 60 states have (on average 1.05) internal successors, (63), 61 states have internal predecessors, (63), 18 states have call successors, (18), 13 states have call predecessors, (18), 14 states have return successors, (21), 18 states have call predecessors, (21), 16 states have call successors, (21) [2023-12-20 00:33:46,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 102 transitions. [2023-12-20 00:33:46,461 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 102 transitions. Word has length 60 [2023-12-20 00:33:46,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 00:33:46,461 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 102 transitions. [2023-12-20 00:33:46,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 8 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (9), 6 states have call predecessors, (9), 7 states have call successors, (9) [2023-12-20 00:33:46,461 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 102 transitions. [2023-12-20 00:33:46,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-12-20 00:33:46,462 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 00:33:46,462 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 00:33:46,473 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-12-20 00:33:46,671 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 [2023-12-20 00:33:46,671 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 00:33:46,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 00:33:46,672 INFO L85 PathProgramCache]: Analyzing trace with hash 308638302, now seen corresponding path program 1 times [2023-12-20 00:33:46,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 00:33:46,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467853036] [2023-12-20 00:33:46,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 00:33:46,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 00:33:46,689 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 00:33:46,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1340363180] [2023-12-20 00:33:46,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 00:33:46,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 00:33:46,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 00:33:46,690 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) [2023-12-20 00:33:46,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-20 00:33:46,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:33:46,805 INFO L262 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 89 conjunts are in the unsatisfiable core [2023-12-20 00:33:46,808 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 00:33:46,812 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 00:33:46,817 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 00:33:46,824 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 00:33:47,135 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-20 00:33:47,142 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2023-12-20 00:33:47,154 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-20 00:33:47,468 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 60 proven. 17 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2023-12-20 00:33:47,469 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 00:33:53,350 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 29 [2023-12-20 00:33:53,509 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2023-12-20 00:33:53,517 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2023-12-20 00:33:54,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 00:33:54,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467853036] [2023-12-20 00:33:54,818 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 00:33:54,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340363180] [2023-12-20 00:33:54,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340363180] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 00:33:54,819 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-20 00:33:54,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2023-12-20 00:33:54,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387356532] [2023-12-20 00:33:54,819 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-20 00:33:54,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-12-20 00:33:54,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 00:33:54,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-12-20 00:33:54,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=512, Unknown=1, NotChecked=0, Total=600 [2023-12-20 00:33:54,820 INFO L87 Difference]: Start difference. First operand 93 states and 102 transitions. Second operand has 15 states, 12 states have (on average 2.5) internal successors, (30), 13 states have internal predecessors, (30), 7 states have call successors, (11), 4 states have call predecessors, (11), 5 states have return successors, (10), 5 states have call predecessors, (10), 6 states have call successors, (10) [2023-12-20 00:33:55,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 00:33:55,459 INFO L93 Difference]: Finished difference Result 95 states and 103 transitions. [2023-12-20 00:33:55,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-20 00:33:55,460 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 2.5) internal successors, (30), 13 states have internal predecessors, (30), 7 states have call successors, (11), 4 states have call predecessors, (11), 5 states have return successors, (10), 5 states have call predecessors, (10), 6 states have call successors, (10) Word has length 66 [2023-12-20 00:33:55,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 00:33:55,460 INFO L225 Difference]: With dead ends: 95 [2023-12-20 00:33:55,460 INFO L226 Difference]: Without dead ends: 73 [2023-12-20 00:33:55,461 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 66 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=165, Invalid=826, Unknown=1, NotChecked=0, Total=992 [2023-12-20 00:33:55,461 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 21 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 15 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-20 00:33:55,461 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 54 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 262 Invalid, 4 Unknown, 0 Unchecked, 0.3s Time] [2023-12-20 00:33:55,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2023-12-20 00:33:55,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2023-12-20 00:33:55,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 47 states have (on average 1.0425531914893618) internal successors, (49), 48 states have internal predecessors, (49), 15 states have call successors, (15), 10 states have call predecessors, (15), 10 states have return successors, (17), 14 states have call predecessors, (17), 14 states have call successors, (17) [2023-12-20 00:33:55,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 81 transitions. [2023-12-20 00:33:55,492 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 81 transitions. Word has length 66 [2023-12-20 00:33:55,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 00:33:55,492 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 81 transitions. [2023-12-20 00:33:55,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 2.5) internal successors, (30), 13 states have internal predecessors, (30), 7 states have call successors, (11), 4 states have call predecessors, (11), 5 states have return successors, (10), 5 states have call predecessors, (10), 6 states have call successors, (10) [2023-12-20 00:33:55,492 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 81 transitions. [2023-12-20 00:33:55,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-12-20 00:33:55,496 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 00:33:55,496 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 00:33:55,501 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-12-20 00:33:55,700 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 [2023-12-20 00:33:55,701 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 00:33:55,702 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 00:33:55,702 INFO L85 PathProgramCache]: Analyzing trace with hash 1776636980, now seen corresponding path program 2 times [2023-12-20 00:33:55,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 00:33:55,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739191254] [2023-12-20 00:33:55,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 00:33:55,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 00:33:55,711 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 00:33:55,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1777333377] [2023-12-20 00:33:55,712 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-20 00:33:55,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 00:33:55,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 00:33:55,712 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) [2023-12-20 00:33:55,717 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-20 00:33:55,818 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-20 00:33:55,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 00:33:55,819 INFO L262 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 76 conjunts are in the unsatisfiable core [2023-12-20 00:33:55,822 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 00:33:55,827 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 00:33:55,832 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 00:33:56,188 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-20 00:33:56,193 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-20 00:33:56,238 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2023-12-20 00:33:56,238 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 00:33:56,713 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-12-20 00:33:56,720 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2023-12-20 00:33:56,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 00:33:56,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739191254] [2023-12-20 00:33:56,914 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 00:33:56,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777333377] [2023-12-20 00:33:56,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777333377] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 00:33:56,914 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-20 00:33:56,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2023-12-20 00:33:56,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887358354] [2023-12-20 00:33:56,914 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-20 00:33:56,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-20 00:33:56,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 00:33:56,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-20 00:33:56,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2023-12-20 00:33:56,917 INFO L87 Difference]: Start difference. First operand 73 states and 81 transitions. Second operand has 12 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 6 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2023-12-20 00:33:57,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 00:33:57,274 INFO L93 Difference]: Finished difference Result 87 states and 98 transitions. [2023-12-20 00:33:57,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-20 00:33:57,275 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 6 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) Word has length 78 [2023-12-20 00:33:57,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 00:33:57,275 INFO L225 Difference]: With dead ends: 87 [2023-12-20 00:33:57,276 INFO L226 Difference]: Without dead ends: 85 [2023-12-20 00:33:57,277 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2023-12-20 00:33:57,278 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 16 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-20 00:33:57,278 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 83 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 310 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-20 00:33:57,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2023-12-20 00:33:57,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 81. [2023-12-20 00:33:57,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 53 states have internal predecessors, (54), 16 states have call successors, (16), 11 states have call predecessors, (16), 12 states have return successors, (21), 16 states have call predecessors, (21), 15 states have call successors, (21) [2023-12-20 00:33:57,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 91 transitions. [2023-12-20 00:33:57,298 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 91 transitions. Word has length 78 [2023-12-20 00:33:57,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 00:33:57,299 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 91 transitions. [2023-12-20 00:33:57,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 6 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2023-12-20 00:33:57,299 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 91 transitions. [2023-12-20 00:33:57,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-12-20 00:33:57,301 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 00:33:57,301 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 00:33:57,306 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-12-20 00:33:57,506 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 [2023-12-20 00:33:57,506 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 00:33:57,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 00:33:57,506 INFO L85 PathProgramCache]: Analyzing trace with hash -1716814110, now seen corresponding path program 3 times [2023-12-20 00:33:57,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 00:33:57,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731032473] [2023-12-20 00:33:57,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 00:33:57,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 00:33:57,520 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 00:33:57,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [694739424] [2023-12-20 00:33:57,520 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-20 00:33:57,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 00:33:57,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 00:33:57,522 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) [2023-12-20 00:33:57,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-20 00:33:57,758 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-12-20 00:33:57,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 00:33:57,761 INFO L262 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 127 conjunts are in the unsatisfiable core [2023-12-20 00:33:57,766 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 00:33:57,771 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 00:33:57,775 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 00:33:58,363 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-20 00:33:58,383 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-20 00:33:58,458 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 53 proven. 37 refuted. 0 times theorem prover too weak. 267 trivial. 0 not checked. [2023-12-20 00:33:58,458 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 00:33:59,786 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-12-20 00:33:59,791 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2023-12-20 00:34:01,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 00:34:01,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731032473] [2023-12-20 00:34:01,305 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 00:34:01,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694739424] [2023-12-20 00:34:01,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694739424] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 00:34:01,305 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-20 00:34:01,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2023-12-20 00:34:01,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735521589] [2023-12-20 00:34:01,305 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-20 00:34:01,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-12-20 00:34:01,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 00:34:01,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-12-20 00:34:01,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2023-12-20 00:34:01,306 INFO L87 Difference]: Start difference. First operand 81 states and 91 transitions. Second operand has 15 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 13 states have internal predecessors, (26), 5 states have call successors, (9), 3 states have call predecessors, (9), 6 states have return successors, (10), 6 states have call predecessors, (10), 4 states have call successors, (10) [2023-12-20 00:34:01,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 00:34:01,879 INFO L93 Difference]: Finished difference Result 95 states and 108 transitions. [2023-12-20 00:34:01,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-20 00:34:01,879 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 13 states have internal predecessors, (26), 5 states have call successors, (9), 3 states have call predecessors, (9), 6 states have return successors, (10), 6 states have call predecessors, (10), 4 states have call successors, (10) Word has length 102 [2023-12-20 00:34:01,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 00:34:01,880 INFO L225 Difference]: With dead ends: 95 [2023-12-20 00:34:01,880 INFO L226 Difference]: Without dead ends: 93 [2023-12-20 00:34:01,881 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2023-12-20 00:34:01,882 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 21 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 450 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-20 00:34:01,882 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 127 Invalid, 459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 450 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-20 00:34:01,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2023-12-20 00:34:01,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 83. [2023-12-20 00:34:01,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 53 states have (on average 1.0377358490566038) internal successors, (55), 54 states have internal predecessors, (55), 16 states have call successors, (16), 11 states have call predecessors, (16), 13 states have return successors, (24), 17 states have call predecessors, (24), 15 states have call successors, (24) [2023-12-20 00:34:01,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 95 transitions. [2023-12-20 00:34:01,893 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 95 transitions. Word has length 102 [2023-12-20 00:34:01,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 00:34:01,893 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 95 transitions. [2023-12-20 00:34:01,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 13 states have internal predecessors, (26), 5 states have call successors, (9), 3 states have call predecessors, (9), 6 states have return successors, (10), 6 states have call predecessors, (10), 4 states have call successors, (10) [2023-12-20 00:34:01,894 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 95 transitions. [2023-12-20 00:34:01,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2023-12-20 00:34:01,894 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 00:34:01,894 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 00:34:01,900 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-12-20 00:34:02,100 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 [2023-12-20 00:34:02,100 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 00:34:02,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 00:34:02,101 INFO L85 PathProgramCache]: Analyzing trace with hash -2067425008, now seen corresponding path program 4 times [2023-12-20 00:34:02,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 00:34:02,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392489998] [2023-12-20 00:34:02,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 00:34:02,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 00:34:02,112 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 00:34:02,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1256546169] [2023-12-20 00:34:02,112 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-20 00:34:02,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 00:34:02,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 00:34:02,113 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) [2023-12-20 00:34:02,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-20 00:34:02,258 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-20 00:34:02,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 00:34:02,262 INFO L262 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 112 conjunts are in the unsatisfiable core [2023-12-20 00:34:02,271 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 00:34:02,542 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2023-12-20 00:34:02,545 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-20 00:34:02,911 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2023-12-20 00:34:02,914 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-20 00:34:02,957 INFO L134 CoverageAnalysis]: Checked inductivity of 566 backedges. 173 proven. 44 refuted. 0 times theorem prover too weak. 349 trivial. 0 not checked. [2023-12-20 00:34:02,957 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 00:34:07,063 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 00:34:07,063 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 75 [2023-12-20 00:34:07,068 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 73 [2023-12-20 00:34:08,479 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 00:34:08,479 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 75 [2023-12-20 00:34:08,482 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 73 [2023-12-20 00:34:09,307 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 00:34:09,307 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 75 [2023-12-20 00:34:09,312 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 73 [2023-12-20 00:34:10,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 00:34:10,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392489998] [2023-12-20 00:34:10,085 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 00:34:10,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256546169] [2023-12-20 00:34:10,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256546169] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 00:34:10,086 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-20 00:34:10,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2023-12-20 00:34:10,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835361998] [2023-12-20 00:34:10,086 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-20 00:34:10,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-12-20 00:34:10,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 00:34:10,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-12-20 00:34:10,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2023-12-20 00:34:10,087 INFO L87 Difference]: Start difference. First operand 83 states and 95 transitions. Second operand has 17 states, 15 states have (on average 2.066666666666667) internal successors, (31), 14 states have internal predecessors, (31), 5 states have call successors, (10), 4 states have call predecessors, (10), 6 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2023-12-20 00:34:10,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 00:34:10,551 INFO L93 Difference]: Finished difference Result 89 states and 100 transitions. [2023-12-20 00:34:10,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-20 00:34:10,551 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 2.066666666666667) internal successors, (31), 14 states have internal predecessors, (31), 5 states have call successors, (10), 4 states have call predecessors, (10), 6 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 126 [2023-12-20 00:34:10,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 00:34:10,555 INFO L225 Difference]: With dead ends: 89 [2023-12-20 00:34:10,555 INFO L226 Difference]: Without dead ends: 87 [2023-12-20 00:34:10,555 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 130 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=142, Invalid=670, Unknown=0, NotChecked=0, Total=812 [2023-12-20 00:34:10,556 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 40 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-20 00:34:10,556 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 56 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-20 00:34:10,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2023-12-20 00:34:10,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 77. [2023-12-20 00:34:10,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 50 states have (on average 1.04) internal successors, (52), 51 states have internal predecessors, (52), 15 states have call successors, (15), 11 states have call predecessors, (15), 11 states have return successors, (17), 14 states have call predecessors, (17), 14 states have call successors, (17) [2023-12-20 00:34:10,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 84 transitions. [2023-12-20 00:34:10,569 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 84 transitions. Word has length 126 [2023-12-20 00:34:10,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 00:34:10,570 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 84 transitions. [2023-12-20 00:34:10,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 2.066666666666667) internal successors, (31), 14 states have internal predecessors, (31), 5 states have call successors, (10), 4 states have call predecessors, (10), 6 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2023-12-20 00:34:10,570 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 84 transitions. [2023-12-20 00:34:10,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-12-20 00:34:10,571 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 00:34:10,571 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 00:34:10,590 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-12-20 00:34:10,776 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 [2023-12-20 00:34:10,776 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 00:34:10,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 00:34:10,777 INFO L85 PathProgramCache]: Analyzing trace with hash 1670656193, now seen corresponding path program 2 times [2023-12-20 00:34:10,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 00:34:10,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11504562] [2023-12-20 00:34:10,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 00:34:10,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 00:34:10,786 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 00:34:10,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [58640545] [2023-12-20 00:34:10,787 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-20 00:34:10,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 00:34:10,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 00:34:10,787 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) [2023-12-20 00:34:10,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-20 00:34:10,939 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-20 00:34:10,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 00:34:10,941 INFO L262 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 121 conjunts are in the unsatisfiable core [2023-12-20 00:34:10,946 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 00:34:10,954 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 00:34:10,959 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 00:34:10,969 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 00:34:11,817 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-20 00:34:11,823 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-20 00:34:11,987 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 80 proven. 82 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2023-12-20 00:34:11,987 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 00:34:13,218 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 47 [2023-12-20 00:34:13,224 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 39 [2023-12-20 00:34:13,231 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2023-12-20 00:34:14,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 00:34:14,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11504562] [2023-12-20 00:34:14,750 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 00:34:14,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58640545] [2023-12-20 00:34:14,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58640545] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 00:34:14,750 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-20 00:34:14,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2023-12-20 00:34:14,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118573220] [2023-12-20 00:34:14,751 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-20 00:34:14,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-12-20 00:34:14,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 00:34:14,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-12-20 00:34:14,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=572, Unknown=0, NotChecked=0, Total=650 [2023-12-20 00:34:14,752 INFO L87 Difference]: Start difference. First operand 77 states and 84 transitions. Second operand has 19 states, 15 states have (on average 2.533333333333333) internal successors, (38), 17 states have internal predecessors, (38), 9 states have call successors, (14), 6 states have call predecessors, (14), 7 states have return successors, (13), 6 states have call predecessors, (13), 8 states have call successors, (13) [2023-12-20 00:34:16,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 00:34:16,100 INFO L93 Difference]: Finished difference Result 101 states and 109 transitions. [2023-12-20 00:34:16,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-12-20 00:34:16,100 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 15 states have (on average 2.533333333333333) internal successors, (38), 17 states have internal predecessors, (38), 9 states have call successors, (14), 6 states have call predecessors, (14), 7 states have return successors, (13), 6 states have call predecessors, (13), 8 states have call successors, (13) Word has length 84 [2023-12-20 00:34:16,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 00:34:16,101 INFO L225 Difference]: With dead ends: 101 [2023-12-20 00:34:16,101 INFO L226 Difference]: Without dead ends: 97 [2023-12-20 00:34:16,102 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 76 SyntacticMatches, 4 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=222, Invalid=1418, Unknown=0, NotChecked=0, Total=1640 [2023-12-20 00:34:16,102 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 42 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 28 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-20 00:34:16,102 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 81 Invalid, 486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 456 Invalid, 2 Unknown, 0 Unchecked, 0.6s Time] [2023-12-20 00:34:16,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2023-12-20 00:34:16,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 95. [2023-12-20 00:34:16,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 62 states have (on average 1.032258064516129) internal successors, (64), 62 states have internal predecessors, (64), 18 states have call successors, (18), 14 states have call predecessors, (18), 14 states have return successors, (22), 18 states have call predecessors, (22), 16 states have call successors, (22) [2023-12-20 00:34:16,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 104 transitions. [2023-12-20 00:34:16,118 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 104 transitions. Word has length 84 [2023-12-20 00:34:16,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 00:34:16,118 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 104 transitions. [2023-12-20 00:34:16,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 15 states have (on average 2.533333333333333) internal successors, (38), 17 states have internal predecessors, (38), 9 states have call successors, (14), 6 states have call predecessors, (14), 7 states have return successors, (13), 6 states have call predecessors, (13), 8 states have call successors, (13) [2023-12-20 00:34:16,119 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 104 transitions. [2023-12-20 00:34:16,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-12-20 00:34:16,120 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 00:34:16,120 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 00:34:16,125 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-12-20 00:34:16,326 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 [2023-12-20 00:34:16,327 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 00:34:16,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 00:34:16,327 INFO L85 PathProgramCache]: Analyzing trace with hash -519102225, now seen corresponding path program 3 times [2023-12-20 00:34:16,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 00:34:16,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8777639] [2023-12-20 00:34:16,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 00:34:16,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 00:34:16,353 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 00:34:16,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1807197791] [2023-12-20 00:34:16,353 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-20 00:34:16,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 00:34:16,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 00:34:16,355 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) [2023-12-20 00:34:16,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-12-20 00:34:16,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-12-20 00:34:16,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 00:34:16,660 INFO L262 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 193 conjunts are in the unsatisfiable core [2023-12-20 00:34:16,664 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 00:34:16,670 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 00:34:16,675 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 00:34:16,684 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 00:34:18,121 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-20 00:34:18,131 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-20 00:34:18,137 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-20 00:34:18,376 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 138 proven. 95 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2023-12-20 00:34:18,376 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 00:34:21,032 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 47 [2023-12-20 00:34:21,038 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 39 [2023-12-20 00:34:21,045 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2023-12-20 00:34:23,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 00:34:23,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8777639] [2023-12-20 00:34:23,575 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 00:34:23,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807197791] [2023-12-20 00:34:23,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807197791] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 00:34:23,575 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-20 00:34:23,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2023-12-20 00:34:23,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708942720] [2023-12-20 00:34:23,575 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-20 00:34:23,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-12-20 00:34:23,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 00:34:23,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-12-20 00:34:23,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=771, Unknown=0, NotChecked=0, Total=870 [2023-12-20 00:34:23,577 INFO L87 Difference]: Start difference. First operand 95 states and 104 transitions. Second operand has 22 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 20 states have internal predecessors, (39), 9 states have call successors, (14), 5 states have call predecessors, (14), 8 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2023-12-20 00:34:25,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 00:34:25,382 INFO L93 Difference]: Finished difference Result 119 states and 129 transitions. [2023-12-20 00:34:25,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-12-20 00:34:25,383 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 20 states have internal predecessors, (39), 9 states have call successors, (14), 5 states have call predecessors, (14), 8 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) Word has length 108 [2023-12-20 00:34:25,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 00:34:25,383 INFO L225 Difference]: With dead ends: 119 [2023-12-20 00:34:25,383 INFO L226 Difference]: Without dead ends: 115 [2023-12-20 00:34:25,384 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 96 SyntacticMatches, 4 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=224, Invalid=1582, Unknown=0, NotChecked=0, Total=1806 [2023-12-20 00:34:25,384 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 40 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 722 mSolverCounterSat, 18 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 743 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 722 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-12-20 00:34:25,384 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 116 Invalid, 743 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 722 Invalid, 3 Unknown, 0 Unchecked, 1.1s Time] [2023-12-20 00:34:25,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2023-12-20 00:34:25,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 97. [2023-12-20 00:34:25,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 63 states have (on average 1.0317460317460319) internal successors, (65), 63 states have internal predecessors, (65), 18 states have call successors, (18), 14 states have call predecessors, (18), 15 states have return successors, (25), 19 states have call predecessors, (25), 16 states have call successors, (25) [2023-12-20 00:34:25,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 108 transitions. [2023-12-20 00:34:25,399 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 108 transitions. Word has length 108 [2023-12-20 00:34:25,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 00:34:25,400 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 108 transitions. [2023-12-20 00:34:25,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 20 states have internal predecessors, (39), 9 states have call successors, (14), 5 states have call predecessors, (14), 8 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2023-12-20 00:34:25,400 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 108 transitions. [2023-12-20 00:34:25,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2023-12-20 00:34:25,401 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 00:34:25,401 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 00:34:25,407 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-12-20 00:34:25,606 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 [2023-12-20 00:34:25,607 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 00:34:25,607 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 00:34:25,607 INFO L85 PathProgramCache]: Analyzing trace with hash 1946968221, now seen corresponding path program 4 times [2023-12-20 00:34:25,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 00:34:25,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888422629] [2023-12-20 00:34:25,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 00:34:25,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 00:34:25,620 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 00:34:25,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1521061602] [2023-12-20 00:34:25,620 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-20 00:34:25,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 00:34:25,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 00:34:25,624 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) [2023-12-20 00:34:25,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-12-20 00:34:25,813 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-20 00:34:25,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 00:34:25,816 INFO L262 TraceCheckSpWp]: Trace formula consists of 528 conjuncts, 118 conjunts are in the unsatisfiable core [2023-12-20 00:34:25,819 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 00:34:26,094 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2023-12-20 00:34:26,098 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-20 00:34:26,492 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2023-12-20 00:34:26,495 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 17 [2023-12-20 00:34:26,543 INFO L134 CoverageAnalysis]: Checked inductivity of 628 backedges. 191 proven. 39 refuted. 0 times theorem prover too weak. 398 trivial. 0 not checked. [2023-12-20 00:34:26,543 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 00:34:31,055 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 00:34:31,055 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 124 treesize of output 87 [2023-12-20 00:34:31,058 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 90 [2023-12-20 00:34:32,794 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 00:34:32,794 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 124 treesize of output 87 [2023-12-20 00:34:32,797 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 90 [2023-12-20 00:34:33,952 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 00:34:33,952 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 132 treesize of output 95 [2023-12-20 00:34:33,956 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 90 [2023-12-20 00:34:35,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 00:34:35,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888422629] [2023-12-20 00:34:35,069 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 00:34:35,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521061602] [2023-12-20 00:34:35,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521061602] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 00:34:35,069 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-20 00:34:35,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2023-12-20 00:34:35,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270836789] [2023-12-20 00:34:35,070 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-20 00:34:35,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-12-20 00:34:35,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 00:34:35,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-12-20 00:34:35,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2023-12-20 00:34:35,070 INFO L87 Difference]: Start difference. First operand 97 states and 108 transitions. Second operand has 17 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 7 states have call successors, (11), 4 states have call predecessors, (11), 6 states have return successors, (10), 5 states have call predecessors, (10), 6 states have call successors, (10) [2023-12-20 00:34:35,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 00:34:35,743 INFO L93 Difference]: Finished difference Result 103 states and 113 transitions. [2023-12-20 00:34:35,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-12-20 00:34:35,743 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 7 states have call successors, (11), 4 states have call predecessors, (11), 6 states have return successors, (10), 5 states have call predecessors, (10), 6 states have call successors, (10) Word has length 132 [2023-12-20 00:34:35,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 00:34:35,744 INFO L225 Difference]: With dead ends: 103 [2023-12-20 00:34:35,744 INFO L226 Difference]: Without dead ends: 99 [2023-12-20 00:34:35,744 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 141 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=170, Invalid=886, Unknown=0, NotChecked=0, Total=1056 [2023-12-20 00:34:35,745 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 42 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 27 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-20 00:34:35,745 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 51 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 297 Invalid, 1 Unknown, 0 Unchecked, 0.4s Time] [2023-12-20 00:34:35,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2023-12-20 00:34:35,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 79. [2023-12-20 00:34:35,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 52 states have (on average 1.0192307692307692) internal successors, (53), 52 states have internal predecessors, (53), 15 states have call successors, (15), 12 states have call predecessors, (15), 11 states have return successors, (17), 14 states have call predecessors, (17), 14 states have call successors, (17) [2023-12-20 00:34:35,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 85 transitions. [2023-12-20 00:34:35,774 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 85 transitions. Word has length 132 [2023-12-20 00:34:35,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 00:34:35,775 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 85 transitions. [2023-12-20 00:34:35,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 7 states have call successors, (11), 4 states have call predecessors, (11), 6 states have return successors, (10), 5 states have call predecessors, (10), 6 states have call successors, (10) [2023-12-20 00:34:35,775 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 85 transitions. [2023-12-20 00:34:35,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-12-20 00:34:35,775 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 00:34:35,775 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 00:34:35,781 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-12-20 00:34:35,981 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 [2023-12-20 00:34:35,981 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 00:34:35,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 00:34:35,982 INFO L85 PathProgramCache]: Analyzing trace with hash -469534580, now seen corresponding path program 2 times [2023-12-20 00:34:35,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 00:34:35,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951103765] [2023-12-20 00:34:35,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 00:34:35,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 00:34:36,000 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 00:34:36,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [19058066] [2023-12-20 00:34:36,000 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-20 00:34:36,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 00:34:36,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 00:34:36,001 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) [2023-12-20 00:34:36,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-12-20 00:34:36,184 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-20 00:34:36,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 00:34:36,186 INFO L262 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 130 conjunts are in the unsatisfiable core [2023-12-20 00:34:36,189 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 00:34:36,194 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 00:34:36,200 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 00:34:36,553 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-20 00:34:36,768 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-12-20 00:34:37,020 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2023-12-20 00:34:37,022 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 22 [2023-12-20 00:34:37,097 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 106 proven. 60 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2023-12-20 00:34:37,097 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 00:34:38,723 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 66 [2023-12-20 00:34:38,739 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 00:34:38,739 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 66 [2023-12-20 00:34:43,327 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 00:34:43,327 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 103 treesize of output 100 [2023-12-20 00:34:43,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 00:34:43,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951103765] [2023-12-20 00:34:43,546 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 00:34:43,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19058066] [2023-12-20 00:34:43,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19058066] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 00:34:43,546 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-20 00:34:43,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2023-12-20 00:34:43,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269723576] [2023-12-20 00:34:43,546 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-20 00:34:43,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-12-20 00:34:43,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 00:34:43,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-12-20 00:34:43,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=631, Unknown=1, NotChecked=0, Total=702 [2023-12-20 00:34:43,547 INFO L87 Difference]: Start difference. First operand 79 states and 85 transitions. Second operand has 20 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 17 states have internal predecessors, (35), 9 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (14), 6 states have call predecessors, (14), 8 states have call successors, (14) [2023-12-20 00:34:46,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 00:34:46,437 INFO L93 Difference]: Finished difference Result 79 states and 85 transitions. [2023-12-20 00:34:46,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-12-20 00:34:46,437 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 17 states have internal predecessors, (35), 9 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (14), 6 states have call predecessors, (14), 8 states have call successors, (14) Word has length 90 [2023-12-20 00:34:46,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 00:34:46,437 INFO L225 Difference]: With dead ends: 79 [2023-12-20 00:34:46,437 INFO L226 Difference]: Without dead ends: 0 [2023-12-20 00:34:46,438 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 87 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=336, Invalid=2010, Unknown=6, NotChecked=0, Total=2352 [2023-12-20 00:34:46,439 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 83 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 372 mSolverCounterSat, 61 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 372 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-12-20 00:34:46,439 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 60 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 372 Invalid, 5 Unknown, 0 Unchecked, 0.9s Time] [2023-12-20 00:34:46,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-12-20 00:34:46,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-12-20 00:34:46,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 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) [2023-12-20 00:34:46,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-12-20 00:34:46,439 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 90 [2023-12-20 00:34:46,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 00:34:46,439 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-12-20 00:34:46,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 17 states have internal predecessors, (35), 9 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (14), 6 states have call predecessors, (14), 8 states have call successors, (14) [2023-12-20 00:34:46,439 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-12-20 00:34:46,439 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-12-20 00:34:46,441 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-20 00:34:46,446 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-12-20 00:34:46,646 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 [2023-12-20 00:34:46,648 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2023-12-20 00:34:51,619 INFO L899 garLoopResultBuilder]: For program point L56(lines 56 62) no Hoare annotation was computed. [2023-12-20 00:34:51,619 INFO L895 garLoopResultBuilder]: At program point L55(line 55) the Hoare annotation is: (let ((.cse2 (select (select |old(#memory_int#1)| |func_to_recursive_line_29_to_40_0_#in~a.base|) |func_to_recursive_line_29_to_40_0_#in~a.offset|))) (let ((.cse0 (* 2 .cse2))) (or (not (= (+ .cse0 1) (select (select |old(#memory_int#2)| |func_to_recursive_line_29_to_40_0_#in~t.base|) |func_to_recursive_line_29_to_40_0_#in~t.offset|))) (let ((.cse1 (select (select |#memory_int#2| |func_to_recursive_line_29_to_40_0_#in~t.base|) |func_to_recursive_line_29_to_40_0_#in~t.offset|))) (and (= func_to_recursive_line_29_to_40_0_~t.offset |func_to_recursive_line_29_to_40_0_#in~t.offset|) (= |func_to_recursive_line_29_to_40_0_#t~mem12| .cse1) (= |#memory_int#2| |old(#memory_int#2)|) (= func_to_recursive_line_29_to_40_0_~t.base |func_to_recursive_line_29_to_40_0_#in~t.base|) (= func_to_recursive_line_29_to_40_0_~a.base |func_to_recursive_line_29_to_40_0_#in~a.base|) (= |#memory_int#1| |old(#memory_int#1)|) (= |func_to_recursive_line_29_to_40_0_#t~mem9| .cse1) (= func_to_recursive_line_29_to_40_0_~s.offset |func_to_recursive_line_29_to_40_0_#in~s.offset|) (= |#memory_int#3| |old(#memory_int#3)|) (= (select (select |#memory_int#3| |func_to_recursive_line_29_to_40_0_#in~s.base|) |func_to_recursive_line_29_to_40_0_#in~s.offset|) |func_to_recursive_line_29_to_40_0_#t~mem11|) (= func_to_recursive_line_29_to_40_0_~a.offset |func_to_recursive_line_29_to_40_0_#in~a.offset|) (= |func_to_recursive_line_29_to_40_0_#t~mem10| .cse1) (= func_to_recursive_line_29_to_40_0_~s.base |func_to_recursive_line_29_to_40_0_#in~s.base|))) (not (= (+ .cse0 (* .cse2 .cse2) 1) (select (select |old(#memory_int#3)| |func_to_recursive_line_29_to_40_0_#in~s.base|) |func_to_recursive_line_29_to_40_0_#in~s.offset|)))))) [2023-12-20 00:34:51,620 INFO L895 garLoopResultBuilder]: At program point L54(line 54) the Hoare annotation is: (let ((.cse2 (select (select |old(#memory_int#1)| |func_to_recursive_line_29_to_40_0_#in~a.base|) |func_to_recursive_line_29_to_40_0_#in~a.offset|))) (let ((.cse0 (* 2 .cse2))) (or (not (= (+ .cse0 1) (select (select |old(#memory_int#2)| |func_to_recursive_line_29_to_40_0_#in~t.base|) |func_to_recursive_line_29_to_40_0_#in~t.offset|))) (let ((.cse1 (select (select |#memory_int#1| |func_to_recursive_line_29_to_40_0_#in~a.base|) |func_to_recursive_line_29_to_40_0_#in~a.offset|))) (and (= func_to_recursive_line_29_to_40_0_~t.offset |func_to_recursive_line_29_to_40_0_#in~t.offset|) (= |#memory_int#2| |old(#memory_int#2)|) (= func_to_recursive_line_29_to_40_0_~t.base |func_to_recursive_line_29_to_40_0_#in~t.base|) (= func_to_recursive_line_29_to_40_0_~a.base |func_to_recursive_line_29_to_40_0_#in~a.base|) (= .cse1 |func_to_recursive_line_29_to_40_0_#t~mem7|) (= |#memory_int#1| |old(#memory_int#1)|) (= (+ |func_to_recursive_line_29_to_40_0_#t~mem7| |func_to_recursive_line_29_to_40_0_#t~mem6| (* |func_to_recursive_line_29_to_40_0_#t~mem7| |func_to_recursive_line_29_to_40_0_#t~mem6|) 1) |func_to_recursive_line_29_to_40_0_#t~mem8|) (= .cse1 |func_to_recursive_line_29_to_40_0_#t~mem6|) (= func_to_recursive_line_29_to_40_0_~s.offset |func_to_recursive_line_29_to_40_0_#in~s.offset|) (= |#memory_int#3| |old(#memory_int#3)|) (= func_to_recursive_line_29_to_40_0_~a.offset |func_to_recursive_line_29_to_40_0_#in~a.offset|) (= func_to_recursive_line_29_to_40_0_~s.base |func_to_recursive_line_29_to_40_0_#in~s.base|))) (not (= (+ .cse0 (* .cse2 .cse2) 1) (select (select |old(#memory_int#3)| |func_to_recursive_line_29_to_40_0_#in~s.base|) |func_to_recursive_line_29_to_40_0_#in~s.offset|)))))) [2023-12-20 00:34:51,620 INFO L899 garLoopResultBuilder]: For program point L55-1(line 55) no Hoare annotation was computed. [2023-12-20 00:34:51,620 INFO L895 garLoopResultBuilder]: At program point L53(line 53) the Hoare annotation is: (let ((.cse1 (select (select |old(#memory_int#1)| |func_to_recursive_line_29_to_40_0_#in~a.base|) |func_to_recursive_line_29_to_40_0_#in~a.offset|))) (let ((.cse0 (* 2 .cse1))) (or (not (= (+ .cse0 1) (select (select |old(#memory_int#2)| |func_to_recursive_line_29_to_40_0_#in~t.base|) |func_to_recursive_line_29_to_40_0_#in~t.offset|))) (not (= (+ .cse0 (* .cse1 .cse1) 1) (select (select |old(#memory_int#3)| |func_to_recursive_line_29_to_40_0_#in~s.base|) |func_to_recursive_line_29_to_40_0_#in~s.offset|))) (and (= func_to_recursive_line_29_to_40_0_~t.offset |func_to_recursive_line_29_to_40_0_#in~t.offset|) (= |#memory_int#2| |old(#memory_int#2)|) (= func_to_recursive_line_29_to_40_0_~t.base |func_to_recursive_line_29_to_40_0_#in~t.base|) (= func_to_recursive_line_29_to_40_0_~a.base |func_to_recursive_line_29_to_40_0_#in~a.base|) (= |#memory_int#1| |old(#memory_int#1)|) (= (select (select |#memory_int#1| |func_to_recursive_line_29_to_40_0_#in~a.base|) |func_to_recursive_line_29_to_40_0_#in~a.offset|) |func_to_recursive_line_29_to_40_0_#t~mem4|) (= (+ (* 2 |func_to_recursive_line_29_to_40_0_#t~mem4|) 1) |func_to_recursive_line_29_to_40_0_#t~mem5|) (= func_to_recursive_line_29_to_40_0_~s.offset |func_to_recursive_line_29_to_40_0_#in~s.offset|) (= |#memory_int#3| |old(#memory_int#3)|) (= func_to_recursive_line_29_to_40_0_~a.offset |func_to_recursive_line_29_to_40_0_#in~a.offset|) (= func_to_recursive_line_29_to_40_0_~s.base |func_to_recursive_line_29_to_40_0_#in~s.base|))))) [2023-12-20 00:34:51,620 INFO L899 garLoopResultBuilder]: For program point L54-1(line 54) no Hoare annotation was computed. [2023-12-20 00:34:51,620 INFO L899 garLoopResultBuilder]: For program point L53-1(line 53) no Hoare annotation was computed. [2023-12-20 00:34:51,620 INFO L899 garLoopResultBuilder]: For program point L50(lines 50 71) no Hoare annotation was computed. [2023-12-20 00:34:51,620 INFO L899 garLoopResultBuilder]: For program point L50-1(lines 48 72) no Hoare annotation was computed. [2023-12-20 00:34:51,620 INFO L895 garLoopResultBuilder]: At program point $Ultimate##0(lines 48 72) the Hoare annotation is: (let ((.cse1 (select (select |old(#memory_int#1)| |func_to_recursive_line_29_to_40_0_#in~a.base|) |func_to_recursive_line_29_to_40_0_#in~a.offset|))) (let ((.cse0 (* 2 .cse1))) (or (not (= (+ .cse0 1) (select (select |old(#memory_int#2)| |func_to_recursive_line_29_to_40_0_#in~t.base|) |func_to_recursive_line_29_to_40_0_#in~t.offset|))) (and (= |#memory_int#2| |old(#memory_int#2)|) (= |#memory_int#1| |old(#memory_int#1)|) (= |#memory_int#3| |old(#memory_int#3)|)) (not (= (+ .cse0 (* .cse1 .cse1) 1) (select (select |old(#memory_int#3)| |func_to_recursive_line_29_to_40_0_#in~s.base|) |func_to_recursive_line_29_to_40_0_#in~s.offset|)))))) [2023-12-20 00:34:51,620 INFO L899 garLoopResultBuilder]: For program point func_to_recursive_line_29_to_40_0EXIT(lines 48 72) no Hoare annotation was computed. [2023-12-20 00:34:51,620 INFO L895 garLoopResultBuilder]: At program point L67(line 67) the Hoare annotation is: (let ((.cse3 (select |old(#memory_int#1)| |func_to_recursive_line_29_to_40_0_#in~a.base|))) (let ((.cse1 (select |old(#memory_int#3)| |func_to_recursive_line_29_to_40_0_#in~s.base|)) (.cse4 (select .cse3 |func_to_recursive_line_29_to_40_0_#in~a.offset|))) (let ((.cse0 (* 2 .cse4)) (.cse2 (select .cse1 |func_to_recursive_line_29_to_40_0_#in~s.offset|))) (or (not (= (+ .cse0 1) (select (select |old(#memory_int#2)| |func_to_recursive_line_29_to_40_0_#in~t.base|) |func_to_recursive_line_29_to_40_0_#in~t.offset|))) (let ((.cse8 (select |old(#memory_int#2)| func_to_recursive_line_29_to_40_0_~t.base))) (let ((.cse7 (select (select |#memory_int#2| func_to_recursive_line_29_to_40_0_~t.base) func_to_recursive_line_29_to_40_0_~t.offset)) (.cse5 (select .cse8 func_to_recursive_line_29_to_40_0_~t.offset))) (and (= |#memory_int#3| (store |old(#memory_int#3)| |func_to_recursive_line_29_to_40_0_#in~s.base| (store .cse1 |func_to_recursive_line_29_to_40_0_#in~s.offset| (+ (select (select |#memory_int#2| |func_to_recursive_line_29_to_40_0_#in~t.base|) |func_to_recursive_line_29_to_40_0_#in~t.offset|) .cse2)))) (= |#memory_int#1| (store |old(#memory_int#1)| |func_to_recursive_line_29_to_40_0_#in~a.base| (store .cse3 |func_to_recursive_line_29_to_40_0_#in~a.offset| (+ .cse4 1)))) (= .cse5 (+ (* (select (select |old(#memory_int#1)| func_to_recursive_line_29_to_40_0_~a.base) func_to_recursive_line_29_to_40_0_~a.offset) 2) 1)) (= |#memory_int#3| (store |old(#memory_int#3)| func_to_recursive_line_29_to_40_0_~s.base (let ((.cse6 (select |old(#memory_int#3)| func_to_recursive_line_29_to_40_0_~s.base))) (store .cse6 func_to_recursive_line_29_to_40_0_~s.offset (+ (select .cse6 func_to_recursive_line_29_to_40_0_~s.offset) .cse7))))) (= .cse7 (+ (* 2 (select (select |#memory_int#1| func_to_recursive_line_29_to_40_0_~a.base) func_to_recursive_line_29_to_40_0_~a.offset)) 1)) (= |#memory_int#2| (store |old(#memory_int#2)| func_to_recursive_line_29_to_40_0_~t.base (store .cse8 func_to_recursive_line_29_to_40_0_~t.offset (+ .cse5 2))))))) (not (= (+ .cse0 (* .cse4 .cse4) 1) .cse2)))))) [2023-12-20 00:34:51,620 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2023-12-20 00:34:51,620 INFO L895 garLoopResultBuilder]: At program point L87(line 87) the Hoare annotation is: (let ((.cse1 (select (select |#memory_int#1| |ULTIMATE.start_main_~#a~0#1.base|) |ULTIMATE.start_main_~#a~0#1.offset|))) (let ((.cse0 (* 2 .cse1))) (and (= (+ (* 2 |ULTIMATE.start_main_#t~mem26#1|) (* |ULTIMATE.start_main_#t~mem26#1| |ULTIMATE.start_main_#t~mem26#1|) 1) (* |ULTIMATE.start_main_#t~mem27#1| 4)) (= |ULTIMATE.start_main_#t~mem26#1| |ULTIMATE.start_main_#t~mem25#1|) (= |ULTIMATE.start_main_#t~mem28#1| |ULTIMATE.start_main_#t~mem26#1|) (= |ULTIMATE.start_main_~#t~0#1.offset| 0) (= (+ .cse0 1) (select (select |#memory_int#2| |ULTIMATE.start_main_~#t~0#1.base|) 0)) (= |ULTIMATE.start_main_~#s~0#1.offset| 0) (= (+ (* .cse1 .cse1) .cse0 1) (select (select |#memory_int#3| |ULTIMATE.start_main_~#s~0#1.base|) 0))))) [2023-12-20 00:34:51,620 INFO L895 garLoopResultBuilder]: At program point L86(line 86) the Hoare annotation is: (let ((.cse0 (select (select |#memory_int#2| |ULTIMATE.start_main_~#t~0#1.base|) 0))) (and (= |ULTIMATE.start_main_#t~mem24#1| (+ (* 2 |ULTIMATE.start_main_#t~mem22#1|) (* |ULTIMATE.start_main_#t~mem22#1| |ULTIMATE.start_main_#t~mem22#1|) 1)) (= |ULTIMATE.start_main_~#t~0#1.offset| 0) (= (+ (* 2 (select (select |#memory_int#1| |ULTIMATE.start_main_~#a~0#1.base|) |ULTIMATE.start_main_~#a~0#1.offset|)) 1) .cse0) (= (* 4 (select (select |#memory_int#3| |ULTIMATE.start_main_~#s~0#1.base|) 0)) (+ (* 2 .cse0) (* .cse0 .cse0) 1)) (= |ULTIMATE.start_main_~#s~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem23#1| |ULTIMATE.start_main_#t~mem22#1|))) [2023-12-20 00:34:51,620 INFO L899 garLoopResultBuilder]: For program point L87-1(line 87) no Hoare annotation was computed. [2023-12-20 00:34:51,621 INFO L895 garLoopResultBuilder]: At program point L85(line 85) the Hoare annotation is: (let ((.cse1 (select (select |#memory_int#1| |ULTIMATE.start_main_~#a~0#1.base|) |ULTIMATE.start_main_~#a~0#1.offset|))) (let ((.cse0 (* 2 .cse1))) (and (= |ULTIMATE.start_main_~#t~0#1.offset| 0) (= (+ .cse0 1) (select (select |#memory_int#2| |ULTIMATE.start_main_~#t~0#1.base|) 0)) (= (+ (* 2 |ULTIMATE.start_main_#t~mem20#1|) 1) |ULTIMATE.start_main_#t~mem21#1|) (= |ULTIMATE.start_main_~#s~0#1.offset| 0) (= (+ (* .cse1 .cse1) .cse0 1) (select (select |#memory_int#3| |ULTIMATE.start_main_~#s~0#1.base|) 0))))) [2023-12-20 00:34:51,621 INFO L899 garLoopResultBuilder]: For program point L86-1(line 86) no Hoare annotation was computed. [2023-12-20 00:34:51,621 INFO L895 garLoopResultBuilder]: At program point L84(line 84) the Hoare annotation is: (and (= (select (select |#memory_int#1| |ULTIMATE.start_main_~#a~0#1.base|) 0) 0) (= |ULTIMATE.start_main_~#t~0#1.offset| 0) (= 1 (select (select |#memory_int#3| |ULTIMATE.start_main_~#s~0#1.base|) 0)) (= (select (select |#memory_int#2| |ULTIMATE.start_main_~#t~0#1.base|) 0) 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_~#s~0#1.offset| 0)) [2023-12-20 00:34:51,621 INFO L899 garLoopResultBuilder]: For program point L85-1(line 85) no Hoare annotation was computed. [2023-12-20 00:34:51,621 INFO L899 garLoopResultBuilder]: For program point L84-1(line 84) no Hoare annotation was computed. [2023-12-20 00:34:51,621 INFO L899 garLoopResultBuilder]: For program point $Ultimate##0(line -1) no Hoare annotation was computed. [2023-12-20 00:34:51,621 INFO L899 garLoopResultBuilder]: For program point L34-2(lines 32 46) no Hoare annotation was computed. [2023-12-20 00:34:51,621 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 32 46) no Hoare annotation was computed. [2023-12-20 00:34:51,621 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 32 46) the Hoare annotation is: true [2023-12-20 00:34:51,621 INFO L899 garLoopResultBuilder]: For program point L36(lines 36 39) no Hoare annotation was computed. [2023-12-20 00:34:51,621 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 38) no Hoare annotation was computed. [2023-12-20 00:34:51,621 INFO L899 garLoopResultBuilder]: For program point L34(lines 34 44) no Hoare annotation was computed. [2023-12-20 00:34:51,623 INFO L445 BasicCegarLoop]: Path program histogram: [4, 4, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 00:34:51,624 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-20 00:34:51,627 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.12 12:34:51 BoogieIcfgContainer [2023-12-20 00:34:51,627 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-20 00:34:51,627 INFO L158 Benchmark]: Toolchain (without parser) took 106373.19ms. Allocated memory was 247.5MB in the beginning and 302.0MB in the end (delta: 54.5MB). Free memory was 207.0MB in the beginning and 91.9MB in the end (delta: 115.1MB). Peak memory consumption was 174.6MB. Max. memory is 8.0GB. [2023-12-20 00:34:51,627 INFO L158 Benchmark]: CDTParser took 0.46ms. Allocated memory is still 205.5MB. Free memory is still 157.2MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-20 00:34:51,628 INFO L158 Benchmark]: CACSL2BoogieTranslator took 174.31ms. Allocated memory is still 247.5MB. Free memory was 206.5MB in the beginning and 195.1MB in the end (delta: 11.4MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-12-20 00:34:51,628 INFO L158 Benchmark]: Boogie Procedure Inliner took 19.29ms. Allocated memory is still 247.5MB. Free memory was 195.1MB in the beginning and 193.6MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-12-20 00:34:51,628 INFO L158 Benchmark]: Boogie Preprocessor took 23.95ms. Allocated memory is still 247.5MB. Free memory was 193.6MB in the beginning and 191.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-20 00:34:51,628 INFO L158 Benchmark]: RCFGBuilder took 240.98ms. Allocated memory is still 247.5MB. Free memory was 191.5MB in the beginning and 175.2MB in the end (delta: 16.3MB). Peak memory consumption was 16.8MB. Max. memory is 8.0GB. [2023-12-20 00:34:51,628 INFO L158 Benchmark]: TraceAbstraction took 105909.93ms. Allocated memory was 247.5MB in the beginning and 302.0MB in the end (delta: 54.5MB). Free memory was 174.7MB in the beginning and 91.9MB in the end (delta: 82.8MB). Peak memory consumption was 143.2MB. Max. memory is 8.0GB. [2023-12-20 00:34:51,629 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.46ms. Allocated memory is still 205.5MB. Free memory is still 157.2MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 174.31ms. Allocated memory is still 247.5MB. Free memory was 206.5MB in the beginning and 195.1MB in the end (delta: 11.4MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 19.29ms. Allocated memory is still 247.5MB. Free memory was 195.1MB in the beginning and 193.6MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 23.95ms. Allocated memory is still 247.5MB. Free memory was 193.6MB in the beginning and 191.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 240.98ms. Allocated memory is still 247.5MB. Free memory was 191.5MB in the beginning and 175.2MB in the end (delta: 16.3MB). Peak memory consumption was 16.8MB. Max. memory is 8.0GB. * TraceAbstraction took 105909.93ms. Allocated memory was 247.5MB in the beginning and 302.0MB in the end (delta: 54.5MB). Free memory was 174.7MB in the beginning and 91.9MB in the end (delta: 82.8MB). Peak memory consumption was 143.2MB. 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 - PositiveResult [Line: 38]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 28 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 105.9s, OverallIterations: 17, TraceHistogramMax: 17, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 26.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 5.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 29 mSolverCounterUnknown, 686 SdHoareTripleChecker+Valid, 15.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 661 mSDsluCounter, 1389 SdHoareTripleChecker+Invalid, 14.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1143 mSDsCounter, 424 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 5424 IncrementalHoareTripleChecker+Invalid, 5877 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 424 mSolverCounterUnsat, 246 mSDtfsCounter, 5424 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1546 GetRequests, 1028 SyntacticMatches, 29 SemanticMatches, 489 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3110 ImplicationChecksByTransitivity, 47.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=97occurred in iteration=15, InterpolantAutomatonStates: 275, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 17 MinimizatonAttempts, 103 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 10 LocationsWithAnnotation, 48 PreInvPairs, 66 NumberOfFragments, 702 HoareAnnotationTreeSize, 48 FormulaSimplifications, 2757 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 10 FormulaSimplificationsInter, 10063 FormulaSimplificationTreeSizeReductionInter, 4.9s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 68.3s InterpolantComputationTime, 1080 NumberOfCodeBlocks, 1030 NumberOfCodeBlocksAsserted, 26 NumberOfCheckSat, 1124 ConstructedInterpolants, 112 QuantifiedInterpolants, 14303 SizeOfPredicates, 394 NumberOfNonLiveVariables, 5179 ConjunctsInSsa, 1441 ConjunctsInUnsatCore, 20 InterpolantComputations, 3 PerfectInterpolantSequences, 2708/3157 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-12-20 00:34:51,802 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...