/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 false -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 [2023-12-21 11:10:00,300 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-21 11:10:00,350 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-21 11:10:00,353 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-21 11:10:00,354 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-21 11:10:00,371 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-21 11:10:00,371 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-21 11:10:00,371 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-21 11:10:00,371 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-21 11:10:00,372 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-21 11:10:00,372 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-21 11:10:00,372 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-21 11:10:00,372 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-21 11:10:00,373 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-21 11:10:00,373 INFO L153 SettingsManager]: * Use SBE=true [2023-12-21 11:10:00,373 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-21 11:10:00,373 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-21 11:10:00,373 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-21 11:10:00,374 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-21 11:10:00,374 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-21 11:10:00,374 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-21 11:10:00,374 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-21 11:10:00,375 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-21 11:10:00,375 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-21 11:10:00,375 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-21 11:10:00,375 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-21 11:10:00,375 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-21 11:10:00,375 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-21 11:10:00,376 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-21 11:10:00,376 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-21 11:10:00,376 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-21 11:10:00,376 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-21 11:10:00,376 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-21 11:10:00,376 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-21 11:10:00,377 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-21 11:10:00,377 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-21 11:10:00,377 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-21 11:10:00,377 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-21 11:10:00,377 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-21 11:10:00,377 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-21 11:10:00,378 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-21 11:10:00,379 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-21 11:10:00,379 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-21 11:10:00,380 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> false [2023-12-21 11:10:00,513 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-21 11:10:00,524 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-21 11:10:00,526 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-21 11:10:00,527 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-21 11:10:00,527 INFO L274 PluginConnector]: CDTParser initialized [2023-12-21 11:10:00,528 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursified_nla-digbench/recursified_sqrt1-ll.c [2023-12-21 11:10:01,508 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-21 11:10:01,630 INFO L384 CDTParser]: Found 1 translation units. [2023-12-21 11:10:01,631 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursified_nla-digbench/recursified_sqrt1-ll.c [2023-12-21 11:10:01,635 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/be9af1c08/6b49b85ccd6b453b80bd8b22e22b564a/FLAG0ed4a5070 [2023-12-21 11:10:01,644 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/be9af1c08/6b49b85ccd6b453b80bd8b22e22b564a [2023-12-21 11:10:01,646 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-21 11:10:01,647 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-21 11:10:01,648 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-21 11:10:01,648 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-21 11:10:01,651 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-21 11:10:01,651 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 11:10:01" (1/1) ... [2023-12-21 11:10:01,652 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56b8a51b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:10:01, skipping insertion in model container [2023-12-21 11:10:01,652 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 11:10:01" (1/1) ... [2023-12-21 11:10:01,666 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-21 11:10:01,781 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] [2023-12-21 11:10:01,793 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-21 11:10:01,800 INFO L202 MainTranslator]: Completed pre-run [2023-12-21 11:10:01,808 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] [2023-12-21 11:10:01,814 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-21 11:10:01,822 INFO L206 MainTranslator]: Completed translation [2023-12-21 11:10:01,823 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:10:01 WrapperNode [2023-12-21 11:10:01,823 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-21 11:10:01,826 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-21 11:10:01,827 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-21 11:10:01,827 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-21 11:10:01,831 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:10:01" (1/1) ... [2023-12-21 11:10:01,840 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:10:01" (1/1) ... [2023-12-21 11:10:01,852 INFO L138 Inliner]: procedures = 16, calls = 58, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 60 [2023-12-21 11:10:01,852 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-21 11:10:01,852 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-21 11:10:01,852 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-21 11:10:01,852 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-21 11:10:01,858 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:10:01" (1/1) ... [2023-12-21 11:10:01,858 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:10:01" (1/1) ... [2023-12-21 11:10:01,860 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:10:01" (1/1) ... [2023-12-21 11:10:01,868 INFO L175 MemorySlicer]: Split 33 memory accesses to 5 slices as follows [2, 2, 8, 9, 12]. 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, 1, 2, 2, 2]. [2023-12-21 11:10:01,868 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:10:01" (1/1) ... [2023-12-21 11:10:01,869 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:10:01" (1/1) ... [2023-12-21 11:10:01,873 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:10:01" (1/1) ... [2023-12-21 11:10:01,874 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:10:01" (1/1) ... [2023-12-21 11:10:01,875 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:10:01" (1/1) ... [2023-12-21 11:10:01,875 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:10:01" (1/1) ... [2023-12-21 11:10:01,877 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-21 11:10:01,877 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-21 11:10:01,877 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-21 11:10:01,877 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-21 11:10:01,878 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:10:01" (1/1) ... [2023-12-21 11:10:01,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-21 11:10:01,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 11:10:01,909 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) [2023-12-21 11:10:01,916 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 [2023-12-21 11:10:01,933 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-21 11:10:01,933 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-21 11:10:01,933 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-12-21 11:10:01,933 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-12-21 11:10:01,933 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-12-21 11:10:01,933 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-12-21 11:10:01,933 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-21 11:10:01,933 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-12-21 11:10:01,933 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-12-21 11:10:01,933 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-12-21 11:10:01,934 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-12-21 11:10:01,934 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-12-21 11:10:01,934 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_29_to_40_0 [2023-12-21 11:10:01,934 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_29_to_40_0 [2023-12-21 11:10:01,934 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-21 11:10:01,934 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-21 11:10:01,934 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-12-21 11:10:01,934 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-12-21 11:10:01,934 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-12-21 11:10:01,934 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-12-21 11:10:01,934 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-12-21 11:10:01,934 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-12-21 11:10:01,935 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-12-21 11:10:01,935 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-21 11:10:01,998 INFO L241 CfgBuilder]: Building ICFG [2023-12-21 11:10:02,000 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-21 11:10:02,168 INFO L282 CfgBuilder]: Performing block encoding [2023-12-21 11:10:02,197 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-21 11:10:02,197 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-12-21 11:10:02,198 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 11:10:02 BoogieIcfgContainer [2023-12-21 11:10:02,198 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-21 11:10:02,199 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-21 11:10:02,199 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-21 11:10:02,201 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-21 11:10:02,202 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 11:10:01" (1/3) ... [2023-12-21 11:10:02,202 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a977f78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 11:10:02, skipping insertion in model container [2023-12-21 11:10:02,202 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:10:01" (2/3) ... [2023-12-21 11:10:02,202 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a977f78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 11:10:02, skipping insertion in model container [2023-12-21 11:10:02,202 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 11:10:02" (3/3) ... [2023-12-21 11:10:02,203 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_sqrt1-ll.c [2023-12-21 11:10:02,218 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-21 11:10:02,218 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-21 11:10:02,259 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-21 11:10:02,263 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;@475bdab2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-21 11:10:02,263 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-21 11:10:02,265 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) [2023-12-21 11:10:02,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-12-21 11:10:02,270 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 11:10:02,270 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 11:10:02,271 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 11:10:02,274 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 11:10:02,274 INFO L85 PathProgramCache]: Analyzing trace with hash -1408384077, now seen corresponding path program 1 times [2023-12-21 11:10:02,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 11:10:02,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890258558] [2023-12-21 11:10:02,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:10:02,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 11:10:02,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:10:02,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 11:10:02,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 11:10:02,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890258558] [2023-12-21 11:10:02,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890258558] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 11:10:02,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 11:10:02,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-21 11:10:02,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659490921] [2023-12-21 11:10:02,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 11:10:02,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-21 11:10:02,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 11:10:02,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-21 11:10:02,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-12-21 11:10:02,829 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) [2023-12-21 11:10:03,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 11:10:03,025 INFO L93 Difference]: Finished difference Result 76 states and 113 transitions. [2023-12-21 11:10:03,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-21 11:10:03,027 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 [2023-12-21 11:10:03,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 11:10:03,032 INFO L225 Difference]: With dead ends: 76 [2023-12-21 11:10:03,032 INFO L226 Difference]: Without dead ends: 47 [2023-12-21 11:10:03,036 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 [2023-12-21 11:10:03,039 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 [2023-12-21 11:10:03,040 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] [2023-12-21 11:10:03,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-12-21 11:10:03,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 41. [2023-12-21 11:10:03,075 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) [2023-12-21 11:10:03,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 50 transitions. [2023-12-21 11:10:03,079 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 50 transitions. Word has length 8 [2023-12-21 11:10:03,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 11:10:03,080 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 50 transitions. [2023-12-21 11:10:03,080 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) [2023-12-21 11:10:03,080 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 50 transitions. [2023-12-21 11:10:03,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-12-21 11:10:03,081 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 11:10:03,082 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 11:10:03,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-21 11:10:03,082 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 11:10:03,083 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 11:10:03,083 INFO L85 PathProgramCache]: Analyzing trace with hash 1735781632, now seen corresponding path program 1 times [2023-12-21 11:10:03,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 11:10:03,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146457736] [2023-12-21 11:10:03,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:10:03,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 11:10:03,113 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 11:10:03,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [384738197] [2023-12-21 11:10:03,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:10:03,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 11:10:03,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 11:10:03,126 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) [2023-12-21 11:10:03,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-21 11:10:03,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:10:03,215 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 65 conjunts are in the unsatisfiable core [2023-12-21 11:10:03,221 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 11:10:03,273 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 [2023-12-21 11:10:03,280 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 [2023-12-21 11:10:03,285 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 [2023-12-21 11:10:03,629 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 11:10:03,629 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 11:10:07,967 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 11:10:07,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 11:10:07,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146457736] [2023-12-21 11:10:07,967 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 11:10:07,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384738197] [2023-12-21 11:10:07,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384738197] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 11:10:07,968 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 11:10:07,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 23 [2023-12-21 11:10:07,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149348134] [2023-12-21 11:10:07,969 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 11:10:07,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-12-21 11:10:07,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 11:10:07,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-12-21 11:10:07,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=428, Unknown=1, NotChecked=0, Total=506 [2023-12-21 11:10:07,970 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) [2023-12-21 11:10:12,441 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] [2023-12-21 11:10:20,550 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] [2023-12-21 11:10:20,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 11:10:20,838 INFO L93 Difference]: Finished difference Result 68 states and 81 transitions. [2023-12-21 11:10:20,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-12-21 11:10:20,839 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 [2023-12-21 11:10:20,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 11:10:20,840 INFO L225 Difference]: With dead ends: 68 [2023-12-21 11:10:20,841 INFO L226 Difference]: Without dead ends: 66 [2023-12-21 11:10:20,841 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=197, Invalid=991, Unknown=2, NotChecked=0, Total=1190 [2023-12-21 11:10:20,842 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 72 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 42 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.4s 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 [2023-12-21 11:10:20,842 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] [2023-12-21 11:10:20,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2023-12-21 11:10:20,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 61. [2023-12-21 11:10:20,856 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) [2023-12-21 11:10:20,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 70 transitions. [2023-12-21 11:10:20,858 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 70 transitions. Word has length 14 [2023-12-21 11:10:20,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 11:10:20,858 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 70 transitions. [2023-12-21 11:10:20,859 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) [2023-12-21 11:10:20,859 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 70 transitions. [2023-12-21 11:10:20,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-12-21 11:10:20,860 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 11:10:20,860 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 11:10:20,869 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-12-21 11:10:21,062 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 [2023-12-21 11:10:21,067 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 11:10:21,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 11:10:21,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1054740085, now seen corresponding path program 1 times [2023-12-21 11:10:21,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 11:10:21,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774040374] [2023-12-21 11:10:21,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:10:21,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 11:10:21,082 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 11:10:21,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [70026440] [2023-12-21 11:10:21,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:10:21,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 11:10:21,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 11:10:21,084 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) [2023-12-21 11:10:21,086 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-21 11:10:21,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:10:21,160 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 49 conjunts are in the unsatisfiable core [2023-12-21 11:10:21,163 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 11:10:21,171 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 [2023-12-21 11:10:21,189 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 [2023-12-21 11:10:21,401 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-21 11:10:21,402 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 11:10:21,587 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-21 11:10:21,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 11:10:21,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774040374] [2023-12-21 11:10:21,587 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 11:10:21,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70026440] [2023-12-21 11:10:21,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70026440] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-21 11:10:21,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-21 11:10:21,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 17 [2023-12-21 11:10:21,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618051212] [2023-12-21 11:10:21,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 11:10:21,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-21 11:10:21,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 11:10:21,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-21 11:10:21,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2023-12-21 11:10:21,589 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) [2023-12-21 11:10:22,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 11:10:22,481 INFO L93 Difference]: Finished difference Result 73 states and 82 transitions. [2023-12-21 11:10:22,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-21 11:10:22,482 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 [2023-12-21 11:10:22,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 11:10:22,483 INFO L225 Difference]: With dead ends: 73 [2023-12-21 11:10:22,483 INFO L226 Difference]: Without dead ends: 71 [2023-12-21 11:10:22,484 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2023-12-21 11:10:22,484 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 19 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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 [2023-12-21 11:10:22,485 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] [2023-12-21 11:10:22,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2023-12-21 11:10:22,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 69. [2023-12-21 11:10:22,504 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) [2023-12-21 11:10:22,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 76 transitions. [2023-12-21 11:10:22,505 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 76 transitions. Word has length 20 [2023-12-21 11:10:22,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 11:10:22,505 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 76 transitions. [2023-12-21 11:10:22,505 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) [2023-12-21 11:10:22,505 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 76 transitions. [2023-12-21 11:10:22,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-12-21 11:10:22,506 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 11:10:22,506 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] [2023-12-21 11:10:22,513 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-21 11:10:22,706 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 [2023-12-21 11:10:22,707 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 11:10:22,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 11:10:22,707 INFO L85 PathProgramCache]: Analyzing trace with hash 1398908834, now seen corresponding path program 1 times [2023-12-21 11:10:22,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 11:10:22,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323693430] [2023-12-21 11:10:22,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:10:22,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 11:10:22,725 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 11:10:22,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [297961456] [2023-12-21 11:10:22,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:10:22,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 11:10:22,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 11:10:22,726 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) [2023-12-21 11:10:22,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-21 11:10:22,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:10:22,819 INFO L262 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 73 conjunts are in the unsatisfiable core [2023-12-21 11:10:22,826 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 11:10:22,841 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 [2023-12-21 11:10:22,845 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 [2023-12-21 11:10:23,118 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 [2023-12-21 11:10:23,124 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 [2023-12-21 11:10:23,230 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-21 11:10:23,230 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 11:10:23,402 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-12-21 11:10:23,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 11:10:23,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323693430] [2023-12-21 11:10:23,402 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 11:10:23,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297961456] [2023-12-21 11:10:23,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297961456] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 11:10:23,403 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 11:10:23,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 19 [2023-12-21 11:10:23,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079978539] [2023-12-21 11:10:23,403 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 11:10:23,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-12-21 11:10:23,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 11:10:23,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-12-21 11:10:23,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2023-12-21 11:10:23,404 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) [2023-12-21 11:10:23,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 11:10:23,922 INFO L93 Difference]: Finished difference Result 93 states and 104 transitions. [2023-12-21 11:10:23,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-12-21 11:10:23,923 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 [2023-12-21 11:10:23,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 11:10:23,923 INFO L225 Difference]: With dead ends: 93 [2023-12-21 11:10:23,924 INFO L226 Difference]: Without dead ends: 91 [2023-12-21 11:10:23,924 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 [2023-12-21 11:10:23,925 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 [2023-12-21 11:10:23,925 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] [2023-12-21 11:10:23,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2023-12-21 11:10:23,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 77. [2023-12-21 11:10:23,937 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) [2023-12-21 11:10:23,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 87 transitions. [2023-12-21 11:10:23,938 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 87 transitions. Word has length 30 [2023-12-21 11:10:23,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 11:10:23,938 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 87 transitions. [2023-12-21 11:10:23,938 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) [2023-12-21 11:10:23,938 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 87 transitions. [2023-12-21 11:10:23,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-12-21 11:10:23,939 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 11:10:23,939 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] [2023-12-21 11:10:23,948 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-21 11:10:24,143 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 [2023-12-21 11:10:24,143 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 11:10:24,144 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 11:10:24,144 INFO L85 PathProgramCache]: Analyzing trace with hash -1438102184, now seen corresponding path program 1 times [2023-12-21 11:10:24,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 11:10:24,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14604567] [2023-12-21 11:10:24,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:10:24,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 11:10:24,153 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 11:10:24,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1195288021] [2023-12-21 11:10:24,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:10:24,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 11:10:24,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 11:10:24,156 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) [2023-12-21 11:10:24,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-21 11:10:24,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:10:24,227 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 20 conjunts are in the unsatisfiable core [2023-12-21 11:10:24,228 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 11:10:24,232 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 [2023-12-21 11:10:24,235 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 [2023-12-21 11:10:24,319 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-21 11:10:24,320 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-21 11:10:24,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 11:10:24,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14604567] [2023-12-21 11:10:24,320 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 11:10:24,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195288021] [2023-12-21 11:10:24,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195288021] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 11:10:24,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 11:10:24,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-21 11:10:24,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785443280] [2023-12-21 11:10:24,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 11:10:24,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-21 11:10:24,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 11:10:24,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-21 11:10:24,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-21 11:10:24,321 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) [2023-12-21 11:10:24,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 11:10:24,480 INFO L93 Difference]: Finished difference Result 91 states and 102 transitions. [2023-12-21 11:10:24,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-21 11:10:24,481 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 [2023-12-21 11:10:24,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 11:10:24,483 INFO L225 Difference]: With dead ends: 91 [2023-12-21 11:10:24,483 INFO L226 Difference]: Without dead ends: 89 [2023-12-21 11:10:24,483 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-12-21 11:10:24,483 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 [2023-12-21 11:10:24,484 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] [2023-12-21 11:10:24,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2023-12-21 11:10:24,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 85. [2023-12-21 11:10:24,512 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) [2023-12-21 11:10:24,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 95 transitions. [2023-12-21 11:10:24,512 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 95 transitions. Word has length 30 [2023-12-21 11:10:24,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 11:10:24,512 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 95 transitions. [2023-12-21 11:10:24,513 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) [2023-12-21 11:10:24,513 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 95 transitions. [2023-12-21 11:10:24,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-12-21 11:10:24,513 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 11:10:24,513 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] [2023-12-21 11:10:24,518 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-21 11:10:24,718 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 [2023-12-21 11:10:24,718 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 11:10:24,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 11:10:24,718 INFO L85 PathProgramCache]: Analyzing trace with hash -1300709659, now seen corresponding path program 1 times [2023-12-21 11:10:24,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 11:10:24,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145868845] [2023-12-21 11:10:24,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:10:24,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 11:10:24,726 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 11:10:24,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [824487300] [2023-12-21 11:10:24,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:10:24,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 11:10:24,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 11:10:24,727 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) [2023-12-21 11:10:24,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-21 11:10:24,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:10:24,804 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 35 conjunts are in the unsatisfiable core [2023-12-21 11:10:24,805 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 11:10:24,809 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 [2023-12-21 11:10:24,813 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 [2023-12-21 11:10:24,817 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 [2023-12-21 11:10:25,049 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-21 11:10:25,049 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 11:10:29,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 11:10:29,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145868845] [2023-12-21 11:10:29,784 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 11:10:29,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824487300] [2023-12-21 11:10:29,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824487300] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 11:10:29,784 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-21 11:10:29,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2023-12-21 11:10:29,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130730417] [2023-12-21 11:10:29,784 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-21 11:10:29,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-21 11:10:29,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 11:10:29,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-21 11:10:29,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=349, Unknown=1, NotChecked=0, Total=420 [2023-12-21 11:10:29,785 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) [2023-12-21 11:10:30,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 11:10:30,203 INFO L93 Difference]: Finished difference Result 101 states and 110 transitions. [2023-12-21 11:10:30,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-21 11:10:30,204 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 [2023-12-21 11:10:30,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 11:10:30,205 INFO L225 Difference]: With dead ends: 101 [2023-12-21 11:10:30,205 INFO L226 Difference]: Without dead ends: 97 [2023-12-21 11:10:30,205 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=143, Invalid=612, Unknown=1, NotChecked=0, Total=756 [2023-12-21 11:10:30,206 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 32 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 28 mSolverCounterUnsat, 2 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, 235 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-21 11:10:30,206 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 66 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 235 Invalid, 2 Unknown, 0 Unchecked, 0.3s Time] [2023-12-21 11:10:30,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2023-12-21 11:10:30,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 95. [2023-12-21 11:10:30,218 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) [2023-12-21 11:10:30,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 105 transitions. [2023-12-21 11:10:30,219 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 105 transitions. Word has length 36 [2023-12-21 11:10:30,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 11:10:30,219 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 105 transitions. [2023-12-21 11:10:30,219 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) [2023-12-21 11:10:30,219 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 105 transitions. [2023-12-21 11:10:30,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-12-21 11:10:30,220 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 11:10:30,220 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] [2023-12-21 11:10:30,230 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-21 11:10:30,424 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 [2023-12-21 11:10:30,425 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 11:10:30,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 11:10:30,426 INFO L85 PathProgramCache]: Analyzing trace with hash -1658463312, now seen corresponding path program 1 times [2023-12-21 11:10:30,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 11:10:30,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889436442] [2023-12-21 11:10:30,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:10:30,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 11:10:30,446 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 11:10:30,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [432207690] [2023-12-21 11:10:30,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:10:30,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 11:10:30,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 11:10:30,449 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) [2023-12-21 11:10:30,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-21 11:10:30,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:10:30,515 INFO L262 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 72 conjunts are in the unsatisfiable core [2023-12-21 11:10:30,519 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 11:10:30,527 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 [2023-12-21 11:10:30,534 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 [2023-12-21 11:10:30,537 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 [2023-12-21 11:10:31,172 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 35 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-21 11:10:31,172 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 11:10:35,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 11:10:35,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889436442] [2023-12-21 11:10:35,776 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 11:10:35,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432207690] [2023-12-21 11:10:35,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432207690] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 11:10:35,776 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-21 11:10:35,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2023-12-21 11:10:35,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711714537] [2023-12-21 11:10:35,776 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-21 11:10:35,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-21 11:10:35,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 11:10:35,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-21 11:10:35,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=609, Unknown=1, NotChecked=0, Total=702 [2023-12-21 11:10:35,777 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) [2023-12-21 11:10:36,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 11:10:36,750 INFO L93 Difference]: Finished difference Result 97 states and 106 transitions. [2023-12-21 11:10:36,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-12-21 11:10:36,750 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 [2023-12-21 11:10:36,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 11:10:36,751 INFO L225 Difference]: With dead ends: 97 [2023-12-21 11:10:36,751 INFO L226 Difference]: Without dead ends: 77 [2023-12-21 11:10:36,752 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=241, Invalid=1478, Unknown=3, NotChecked=0, Total=1722 [2023-12-21 11:10:36,753 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 45 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 34 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-21 11:10:36,753 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 62 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 332 Invalid, 6 Unknown, 0 Unchecked, 0.4s Time] [2023-12-21 11:10:36,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2023-12-21 11:10:36,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2023-12-21 11:10:36,764 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) [2023-12-21 11:10:36,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 86 transitions. [2023-12-21 11:10:36,764 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 86 transitions. Word has length 42 [2023-12-21 11:10:36,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 11:10:36,764 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 86 transitions. [2023-12-21 11:10:36,764 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) [2023-12-21 11:10:36,765 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 86 transitions. [2023-12-21 11:10:36,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-12-21 11:10:36,768 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 11:10:36,769 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] [2023-12-21 11:10:36,778 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-12-21 11:10:36,976 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 [2023-12-21 11:10:36,976 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 11:10:36,977 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 11:10:36,977 INFO L85 PathProgramCache]: Analyzing trace with hash 983693574, now seen corresponding path program 1 times [2023-12-21 11:10:36,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 11:10:36,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161111559] [2023-12-21 11:10:36,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:10:36,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 11:10:36,988 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 11:10:36,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1337295062] [2023-12-21 11:10:36,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:10:36,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 11:10:36,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 11:10:36,989 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) [2023-12-21 11:10:37,007 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-21 11:10:37,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:10:37,068 INFO L262 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 52 conjunts are in the unsatisfiable core [2023-12-21 11:10:37,070 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 11:10:37,074 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 [2023-12-21 11:10:37,080 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 [2023-12-21 11:10:37,274 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 [2023-12-21 11:10:37,279 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 [2023-12-21 11:10:37,322 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2023-12-21 11:10:37,322 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 11:10:37,579 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 [2023-12-21 11:10:37,587 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 [2023-12-21 11:10:37,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 11:10:37,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161111559] [2023-12-21 11:10:37,652 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 11:10:37,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337295062] [2023-12-21 11:10:37,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337295062] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 11:10:37,652 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-21 11:10:37,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2023-12-21 11:10:37,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065122080] [2023-12-21 11:10:37,652 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-21 11:10:37,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-21 11:10:37,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 11:10:37,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-21 11:10:37,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2023-12-21 11:10:37,653 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) [2023-12-21 11:10:37,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 11:10:37,887 INFO L93 Difference]: Finished difference Result 89 states and 99 transitions. [2023-12-21 11:10:37,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-21 11:10:37,887 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 [2023-12-21 11:10:37,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 11:10:37,888 INFO L225 Difference]: With dead ends: 89 [2023-12-21 11:10:37,888 INFO L226 Difference]: Without dead ends: 87 [2023-12-21 11:10:37,888 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 [2023-12-21 11:10:37,889 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 15 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 [2023-12-21 11:10:37,889 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] [2023-12-21 11:10:37,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2023-12-21 11:10:37,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 83. [2023-12-21 11:10:37,900 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) [2023-12-21 11:10:37,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 92 transitions. [2023-12-21 11:10:37,901 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 92 transitions. Word has length 54 [2023-12-21 11:10:37,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 11:10:37,901 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 92 transitions. [2023-12-21 11:10:37,901 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) [2023-12-21 11:10:37,901 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 92 transitions. [2023-12-21 11:10:37,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-12-21 11:10:37,902 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 11:10:37,902 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] [2023-12-21 11:10:37,910 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-12-21 11:10:38,109 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 [2023-12-21 11:10:38,109 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 11:10:38,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 11:10:38,110 INFO L85 PathProgramCache]: Analyzing trace with hash -1709019117, now seen corresponding path program 1 times [2023-12-21 11:10:38,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 11:10:38,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842942055] [2023-12-21 11:10:38,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:10:38,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 11:10:38,121 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 11:10:38,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2131639518] [2023-12-21 11:10:38,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:10:38,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 11:10:38,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 11:10:38,123 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) [2023-12-21 11:10:38,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-21 11:10:38,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:10:38,221 INFO L262 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 113 conjunts are in the unsatisfiable core [2023-12-21 11:10:38,227 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 11:10:38,231 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 [2023-12-21 11:10:38,235 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 [2023-12-21 11:10:38,442 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 [2023-12-21 11:10:39,080 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 [2023-12-21 11:10:39,094 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 19 treesize of output 11 [2023-12-21 11:10:39,179 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 11:10:39,179 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 23 treesize of output 27 [2023-12-21 11:10:39,484 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 63 proven. 31 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-21 11:10:39,484 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 11:10:44,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 11:10:44,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842942055] [2023-12-21 11:10:44,619 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 11:10:44,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131639518] [2023-12-21 11:10:44,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131639518] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 11:10:44,619 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-21 11:10:44,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2023-12-21 11:10:44,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732943850] [2023-12-21 11:10:44,619 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-21 11:10:44,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-12-21 11:10:44,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 11:10:44,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-12-21 11:10:44,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1191, Unknown=1, NotChecked=0, Total=1332 [2023-12-21 11:10:44,621 INFO L87 Difference]: Start difference. First operand 83 states and 92 transitions. Second operand has 28 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 20 states have internal predecessors, (35), 8 states have call successors, (10), 7 states have call predecessors, (10), 7 states have return successors, (9), 6 states have call predecessors, (9), 7 states have call successors, (9) [2023-12-21 11:10:47,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 11:10:47,433 INFO L93 Difference]: Finished difference Result 99 states and 107 transitions. [2023-12-21 11:10:47,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-12-21 11:10:47,434 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 20 states have internal predecessors, (35), 8 states have call successors, (10), 7 states have call predecessors, (10), 7 states have return successors, (9), 6 states have call predecessors, (9), 7 states have call successors, (9) Word has length 60 [2023-12-21 11:10:47,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 11:10:47,434 INFO L225 Difference]: With dead ends: 99 [2023-12-21 11:10:47,434 INFO L226 Difference]: Without dead ends: 95 [2023-12-21 11:10:47,435 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 751 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=456, Invalid=3083, Unknown=1, NotChecked=0, Total=3540 [2023-12-21 11:10:47,435 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 90 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 613 mSolverCounterSat, 75 mSolverCounterUnsat, 11 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 613 IncrementalHoareTripleChecker+Invalid, 11 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-12-21 11:10:47,436 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 78 Invalid, 699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 613 Invalid, 11 Unknown, 0 Unchecked, 1.1s Time] [2023-12-21 11:10:47,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2023-12-21 11:10:47,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 93. [2023-12-21 11:10:47,450 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) [2023-12-21 11:10:47,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 102 transitions. [2023-12-21 11:10:47,451 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 102 transitions. Word has length 60 [2023-12-21 11:10:47,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 11:10:47,451 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 102 transitions. [2023-12-21 11:10:47,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 20 states have internal predecessors, (35), 8 states have call successors, (10), 7 states have call predecessors, (10), 7 states have return successors, (9), 6 states have call predecessors, (9), 7 states have call successors, (9) [2023-12-21 11:10:47,451 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 102 transitions. [2023-12-21 11:10:47,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-12-21 11:10:47,451 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 11:10:47,452 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] [2023-12-21 11:10:47,456 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-12-21 11:10:47,654 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 [2023-12-21 11:10:47,655 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 11:10:47,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 11:10:47,655 INFO L85 PathProgramCache]: Analyzing trace with hash 308638302, now seen corresponding path program 1 times [2023-12-21 11:10:47,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 11:10:47,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442976128] [2023-12-21 11:10:47,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:10:47,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 11:10:47,670 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 11:10:47,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [30970156] [2023-12-21 11:10:47,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:10:47,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 11:10:47,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 11:10:47,671 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) [2023-12-21 11:10:47,688 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-21 11:10:47,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:10:47,765 INFO L262 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 108 conjunts are in the unsatisfiable core [2023-12-21 11:10:47,768 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 11:10:47,772 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 [2023-12-21 11:10:47,779 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 [2023-12-21 11:10:47,982 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 [2023-12-21 11:10:48,286 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 [2023-12-21 11:10:48,305 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 [2023-12-21 11:10:48,640 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 72 proven. 21 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-12-21 11:10:48,640 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 11:10:58,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 11:10:58,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442976128] [2023-12-21 11:10:58,155 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 11:10:58,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30970156] [2023-12-21 11:10:58,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30970156] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 11:10:58,155 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-21 11:10:58,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2023-12-21 11:10:58,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573851657] [2023-12-21 11:10:58,155 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-21 11:10:58,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-12-21 11:10:58,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 11:10:58,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-12-21 11:10:58,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=938, Unknown=1, NotChecked=0, Total=1056 [2023-12-21 11:10:58,156 INFO L87 Difference]: Start difference. First operand 93 states and 102 transitions. Second operand has 22 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 18 states have internal predecessors, (33), 8 states have call successors, (11), 5 states have call predecessors, (11), 6 states have return successors, (10), 6 states have call predecessors, (10), 7 states have call successors, (10) [2023-12-21 11:11:00,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 11:11:00,152 INFO L93 Difference]: Finished difference Result 95 states and 103 transitions. [2023-12-21 11:11:00,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-12-21 11:11:00,153 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 18 states have internal predecessors, (33), 8 states have call successors, (11), 5 states have call predecessors, (11), 6 states have return successors, (10), 6 states have call predecessors, (10), 7 states have call successors, (10) Word has length 66 [2023-12-21 11:11:00,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 11:11:00,153 INFO L225 Difference]: With dead ends: 95 [2023-12-21 11:11:00,153 INFO L226 Difference]: Without dead ends: 73 [2023-12-21 11:11:00,154 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=289, Invalid=2062, Unknown=1, NotChecked=0, Total=2352 [2023-12-21 11:11:00,154 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 34 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 615 mSolverCounterSat, 23 mSolverCounterUnsat, 13 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 615 IncrementalHoareTripleChecker+Invalid, 13 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-21 11:11:00,155 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 88 Invalid, 651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 615 Invalid, 13 Unknown, 0 Unchecked, 0.6s Time] [2023-12-21 11:11:00,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2023-12-21 11:11:00,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2023-12-21 11:11:00,167 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) [2023-12-21 11:11:00,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 81 transitions. [2023-12-21 11:11:00,168 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 81 transitions. Word has length 66 [2023-12-21 11:11:00,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 11:11:00,168 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 81 transitions. [2023-12-21 11:11:00,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 18 states have internal predecessors, (33), 8 states have call successors, (11), 5 states have call predecessors, (11), 6 states have return successors, (10), 6 states have call predecessors, (10), 7 states have call successors, (10) [2023-12-21 11:11:00,168 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 81 transitions. [2023-12-21 11:11:00,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-12-21 11:11:00,168 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 11:11:00,168 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] [2023-12-21 11:11:00,173 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-12-21 11:11:00,373 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 [2023-12-21 11:11:00,374 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 11:11:00,374 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 11:11:00,374 INFO L85 PathProgramCache]: Analyzing trace with hash 1776636980, now seen corresponding path program 2 times [2023-12-21 11:11:00,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 11:11:00,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364221374] [2023-12-21 11:11:00,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:11:00,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 11:11:00,383 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 11:11:00,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1788956482] [2023-12-21 11:11:00,383 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-21 11:11:00,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 11:11:00,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 11:11:00,385 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) [2023-12-21 11:11:00,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-21 11:11:00,493 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-21 11:11:00,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 11:11:00,495 INFO L262 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 80 conjunts are in the unsatisfiable core [2023-12-21 11:11:00,505 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 11:11:00,511 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 [2023-12-21 11:11:00,515 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 [2023-12-21 11:11:00,835 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 [2023-12-21 11:11:00,860 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 [2023-12-21 11:11:00,926 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2023-12-21 11:11:00,926 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 11:11:01,494 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 [2023-12-21 11:11:01,503 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 [2023-12-21 11:11:01,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 11:11:01,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364221374] [2023-12-21 11:11:01,714 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 11:11:01,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788956482] [2023-12-21 11:11:01,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788956482] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 11:11:01,714 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-21 11:11:01,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2023-12-21 11:11:01,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148781262] [2023-12-21 11:11:01,715 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-21 11:11:01,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-21 11:11:01,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 11:11:01,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-21 11:11:01,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2023-12-21 11:11:01,716 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) [2023-12-21 11:11:02,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 11:11:02,096 INFO L93 Difference]: Finished difference Result 87 states and 98 transitions. [2023-12-21 11:11:02,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-21 11:11:02,096 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 [2023-12-21 11:11:02,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 11:11:02,097 INFO L225 Difference]: With dead ends: 87 [2023-12-21 11:11:02,097 INFO L226 Difference]: Without dead ends: 85 [2023-12-21 11:11:02,098 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2023-12-21 11:11:02,098 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 16 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-21 11:11:02,098 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 85 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-21 11:11:02,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2023-12-21 11:11:02,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 81. [2023-12-21 11:11:02,111 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) [2023-12-21 11:11:02,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 91 transitions. [2023-12-21 11:11:02,112 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 91 transitions. Word has length 78 [2023-12-21 11:11:02,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 11:11:02,112 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 91 transitions. [2023-12-21 11:11:02,112 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) [2023-12-21 11:11:02,112 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 91 transitions. [2023-12-21 11:11:02,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-12-21 11:11:02,113 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 11:11:02,113 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] [2023-12-21 11:11:02,120 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-12-21 11:11:02,313 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 [2023-12-21 11:11:02,313 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 11:11:02,313 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 11:11:02,314 INFO L85 PathProgramCache]: Analyzing trace with hash -1716814110, now seen corresponding path program 3 times [2023-12-21 11:11:02,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 11:11:02,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514799747] [2023-12-21 11:11:02,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:11:02,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 11:11:02,324 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 11:11:02,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [479925726] [2023-12-21 11:11:02,325 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-21 11:11:02,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 11:11:02,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 11:11:02,326 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) [2023-12-21 11:11:02,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-21 11:11:02,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-12-21 11:11:02,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 11:11:02,473 INFO L262 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 147 conjunts are in the unsatisfiable core [2023-12-21 11:11:02,480 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 11:11:02,484 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 [2023-12-21 11:11:02,490 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 [2023-12-21 11:11:03,142 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 19 treesize of output 11 [2023-12-21 11:11:03,146 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 [2023-12-21 11:11:03,216 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 47 proven. 62 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2023-12-21 11:11:03,216 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 11:11:06,539 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 [2023-12-21 11:11:06,545 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 [2023-12-21 11:11:08,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 11:11:08,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514799747] [2023-12-21 11:11:08,267 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 11:11:08,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479925726] [2023-12-21 11:11:08,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479925726] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 11:11:08,267 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-21 11:11:08,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2023-12-21 11:11:08,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18886298] [2023-12-21 11:11:08,267 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-21 11:11:08,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-12-21 11:11:08,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 11:11:08,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-12-21 11:11:08,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2023-12-21 11:11:08,268 INFO L87 Difference]: Start difference. First operand 81 states and 91 transitions. Second operand has 17 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 15 states have internal predecessors, (32), 7 states have call successors, (13), 3 states have call predecessors, (13), 6 states have return successors, (14), 7 states have call predecessors, (14), 6 states have call successors, (14) [2023-12-21 11:11:08,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 11:11:08,823 INFO L93 Difference]: Finished difference Result 95 states and 108 transitions. [2023-12-21 11:11:08,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-21 11:11:08,824 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 15 states have internal predecessors, (32), 7 states have call successors, (13), 3 states have call predecessors, (13), 6 states have return successors, (14), 7 states have call predecessors, (14), 6 states have call successors, (14) Word has length 102 [2023-12-21 11:11:08,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 11:11:08,826 INFO L225 Difference]: With dead ends: 95 [2023-12-21 11:11:08,826 INFO L226 Difference]: Without dead ends: 93 [2023-12-21 11:11:08,827 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=109, Invalid=703, Unknown=0, NotChecked=0, Total=812 [2023-12-21 11:11:08,828 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 23 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-21 11:11:08,828 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 115 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 467 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-21 11:11:08,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2023-12-21 11:11:08,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 83. [2023-12-21 11:11:08,843 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) [2023-12-21 11:11:08,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 95 transitions. [2023-12-21 11:11:08,844 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 95 transitions. Word has length 102 [2023-12-21 11:11:08,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 11:11:08,844 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 95 transitions. [2023-12-21 11:11:08,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 15 states have internal predecessors, (32), 7 states have call successors, (13), 3 states have call predecessors, (13), 6 states have return successors, (14), 7 states have call predecessors, (14), 6 states have call successors, (14) [2023-12-21 11:11:08,844 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 95 transitions. [2023-12-21 11:11:08,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2023-12-21 11:11:08,845 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 11:11:08,845 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] [2023-12-21 11:11:08,853 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-12-21 11:11:09,051 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 [2023-12-21 11:11:09,051 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 11:11:09,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 11:11:09,051 INFO L85 PathProgramCache]: Analyzing trace with hash -2067425008, now seen corresponding path program 4 times [2023-12-21 11:11:09,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 11:11:09,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977398113] [2023-12-21 11:11:09,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:11:09,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 11:11:09,063 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 11:11:09,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [16798418] [2023-12-21 11:11:09,063 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-21 11:11:09,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 11:11:09,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 11:11:09,064 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) [2023-12-21 11:11:09,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-21 11:11:09,196 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-21 11:11:09,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 11:11:09,199 INFO L262 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 112 conjunts are in the unsatisfiable core [2023-12-21 11:11:09,203 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 11:11:09,433 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 [2023-12-21 11:11:09,440 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 [2023-12-21 11:11:09,703 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 [2023-12-21 11:11:09,705 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 [2023-12-21 11:11:09,740 INFO L134 CoverageAnalysis]: Checked inductivity of 566 backedges. 173 proven. 44 refuted. 0 times theorem prover too weak. 349 trivial. 0 not checked. [2023-12-21 11:11:09,740 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 11:11:12,559 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 56 treesize of output 52 [2023-12-21 11:11:12,562 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 79 treesize of output 71 [2023-12-21 11:11:13,610 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 56 treesize of output 52 [2023-12-21 11:11:13,612 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 79 treesize of output 71 [2023-12-21 11:11:14,470 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 56 treesize of output 52 [2023-12-21 11:11:14,473 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 79 treesize of output 71 [2023-12-21 11:11:15,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 11:11:15,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977398113] [2023-12-21 11:11:15,273 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 11:11:15,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16798418] [2023-12-21 11:11:15,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16798418] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 11:11:15,273 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-21 11:11:15,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2023-12-21 11:11:15,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091820017] [2023-12-21 11:11:15,273 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-21 11:11:15,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-12-21 11:11:15,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 11:11:15,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-12-21 11:11:15,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2023-12-21 11:11:15,275 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) [2023-12-21 11:11:15,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 11:11:15,702 INFO L93 Difference]: Finished difference Result 89 states and 100 transitions. [2023-12-21 11:11:15,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-21 11:11:15,702 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 [2023-12-21 11:11:15,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 11:11:15,703 INFO L225 Difference]: With dead ends: 89 [2023-12-21 11:11:15,703 INFO L226 Difference]: Without dead ends: 87 [2023-12-21 11:11:15,703 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 [2023-12-21 11:11:15,704 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 43 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-21 11:11:15,704 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 60 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-21 11:11:15,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2023-12-21 11:11:15,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 77. [2023-12-21 11:11:15,717 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) [2023-12-21 11:11:15,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 84 transitions. [2023-12-21 11:11:15,718 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 84 transitions. Word has length 126 [2023-12-21 11:11:15,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 11:11:15,718 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 84 transitions. [2023-12-21 11:11:15,718 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) [2023-12-21 11:11:15,718 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 84 transitions. [2023-12-21 11:11:15,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-12-21 11:11:15,719 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 11:11:15,719 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] [2023-12-21 11:11:15,724 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-12-21 11:11:15,920 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 [2023-12-21 11:11:15,920 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 11:11:15,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 11:11:15,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1670656193, now seen corresponding path program 2 times [2023-12-21 11:11:15,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 11:11:15,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413457739] [2023-12-21 11:11:15,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:11:15,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 11:11:15,934 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 11:11:15,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1075860528] [2023-12-21 11:11:15,935 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-21 11:11:15,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 11:11:15,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 11:11:15,936 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) [2023-12-21 11:11:15,950 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-21 11:11:16,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-21 11:11:16,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 11:11:16,072 INFO L262 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 134 conjunts are in the unsatisfiable core [2023-12-21 11:11:16,075 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 11:11:16,079 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 [2023-12-21 11:11:16,086 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 [2023-12-21 11:11:16,393 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 15 treesize of output 11 [2023-12-21 11:11:16,420 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-12-21 11:11:16,453 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 [2023-12-21 11:11:16,806 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 3 [2023-12-21 11:11:16,922 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 41 treesize of output 21 [2023-12-21 11:11:16,928 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 22 treesize of output 14 [2023-12-21 11:11:16,992 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 97 proven. 57 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2023-12-21 11:11:16,992 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 11:11:18,152 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 119 treesize of output 115 [2023-12-21 11:11:18,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 11:11:18,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413457739] [2023-12-21 11:11:18,201 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 11:11:18,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075860528] [2023-12-21 11:11:18,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075860528] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 11:11:18,201 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-21 11:11:18,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2023-12-21 11:11:18,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141629461] [2023-12-21 11:11:18,202 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-21 11:11:18,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-12-21 11:11:18,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 11:11:18,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-12-21 11:11:18,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2023-12-21 11:11:18,203 INFO L87 Difference]: Start difference. First operand 77 states and 84 transitions. Second operand has 22 states, 16 states have (on average 2.3125) internal successors, (37), 19 states have internal predecessors, (37), 11 states have call successors, (14), 6 states have call predecessors, (14), 6 states have return successors, (13), 6 states have call predecessors, (13), 10 states have call successors, (13) [2023-12-21 11:11:19,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 11:11:19,619 INFO L93 Difference]: Finished difference Result 83 states and 89 transitions. [2023-12-21 11:11:19,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-12-21 11:11:19,620 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 16 states have (on average 2.3125) internal successors, (37), 19 states have internal predecessors, (37), 11 states have call successors, (14), 6 states have call predecessors, (14), 6 states have return successors, (13), 6 states have call predecessors, (13), 10 states have call successors, (13) Word has length 84 [2023-12-21 11:11:19,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 11:11:19,620 INFO L225 Difference]: With dead ends: 83 [2023-12-21 11:11:19,620 INFO L226 Difference]: Without dead ends: 79 [2023-12-21 11:11:19,621 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 74 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=351, Invalid=2001, Unknown=0, NotChecked=0, Total=2352 [2023-12-21 11:11:19,621 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 105 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 401 mSolverCounterSat, 82 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 401 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-21 11:11:19,622 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 57 Invalid, 486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 401 Invalid, 3 Unknown, 0 Unchecked, 0.5s Time] [2023-12-21 11:11:19,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2023-12-21 11:11:19,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2023-12-21 11:11:19,636 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) [2023-12-21 11:11:19,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 85 transitions. [2023-12-21 11:11:19,637 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 85 transitions. Word has length 84 [2023-12-21 11:11:19,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 11:11:19,637 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 85 transitions. [2023-12-21 11:11:19,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 16 states have (on average 2.3125) internal successors, (37), 19 states have internal predecessors, (37), 11 states have call successors, (14), 6 states have call predecessors, (14), 6 states have return successors, (13), 6 states have call predecessors, (13), 10 states have call successors, (13) [2023-12-21 11:11:19,637 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 85 transitions. [2023-12-21 11:11:19,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-12-21 11:11:19,638 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 11:11:19,638 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] [2023-12-21 11:11:19,643 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-12-21 11:11:19,839 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 [2023-12-21 11:11:19,839 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 11:11:19,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 11:11:19,839 INFO L85 PathProgramCache]: Analyzing trace with hash -469534580, now seen corresponding path program 2 times [2023-12-21 11:11:19,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 11:11:19,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686256640] [2023-12-21 11:11:19,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:11:19,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 11:11:19,850 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 11:11:19,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1652847302] [2023-12-21 11:11:19,850 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-21 11:11:19,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 11:11:19,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 11:11:19,851 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) [2023-12-21 11:11:19,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-12-21 11:11:19,999 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-21 11:11:19,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 11:11:20,001 INFO L262 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 140 conjunts are in the unsatisfiable core [2023-12-21 11:11:20,005 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 11:11:20,018 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 [2023-12-21 11:11:20,023 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 [2023-12-21 11:11:20,029 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 [2023-12-21 11:11:20,990 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 [2023-12-21 11:11:20,997 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 [2023-12-21 11:11:21,004 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 [2023-12-21 11:11:21,244 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 42 proven. 173 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2023-12-21 11:11:21,244 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 11:11:23,304 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 41 [2023-12-21 11:11:23,310 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 41 treesize of output 37 [2023-12-21 11:11:23,315 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 21 [2023-12-21 11:11:27,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 11:11:27,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686256640] [2023-12-21 11:11:27,496 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 11:11:27,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652847302] [2023-12-21 11:11:27,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652847302] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 11:11:27,497 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-21 11:11:27,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2023-12-21 11:11:27,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680390099] [2023-12-21 11:11:27,497 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-21 11:11:27,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-12-21 11:11:27,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 11:11:27,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-12-21 11:11:27,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2023-12-21 11:11:27,498 INFO L87 Difference]: Start difference. First operand 79 states and 85 transitions. Second operand has 19 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 17 states have internal predecessors, (35), 8 states have call successors, (12), 5 states have call predecessors, (12), 7 states have return successors, (11), 6 states have call predecessors, (11), 7 states have call successors, (11) [2023-12-21 11:11:28,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 11:11:28,729 INFO L93 Difference]: Finished difference Result 99 states and 106 transitions. [2023-12-21 11:11:28,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-12-21 11:11:28,729 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 17 states have internal predecessors, (35), 8 states have call successors, (12), 5 states have call predecessors, (12), 7 states have return successors, (11), 6 states have call predecessors, (11), 7 states have call successors, (11) Word has length 90 [2023-12-21 11:11:28,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 11:11:28,730 INFO L225 Difference]: With dead ends: 99 [2023-12-21 11:11:28,730 INFO L226 Difference]: Without dead ends: 81 [2023-12-21 11:11:28,731 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 80 SyntacticMatches, 11 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=198, Invalid=1208, Unknown=0, NotChecked=0, Total=1406 [2023-12-21 11:11:28,731 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 38 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 374 mSolverCounterSat, 21 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 374 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-21 11:11:28,731 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 77 Invalid, 399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 374 Invalid, 4 Unknown, 0 Unchecked, 0.5s Time] [2023-12-21 11:11:28,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2023-12-21 11:11:28,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2023-12-21 11:11:28,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 53 states have (on average 1.0188679245283019) internal successors, (54), 53 states have internal predecessors, (54), 15 states have call successors, (15), 12 states have call predecessors, (15), 12 states have return successors, (18), 15 states have call predecessors, (18), 14 states have call successors, (18) [2023-12-21 11:11:28,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 87 transitions. [2023-12-21 11:11:28,747 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 87 transitions. Word has length 90 [2023-12-21 11:11:28,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 11:11:28,748 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 87 transitions. [2023-12-21 11:11:28,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 17 states have internal predecessors, (35), 8 states have call successors, (12), 5 states have call predecessors, (12), 7 states have return successors, (11), 6 states have call predecessors, (11), 7 states have call successors, (11) [2023-12-21 11:11:28,748 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 87 transitions. [2023-12-21 11:11:28,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2023-12-21 11:11:28,748 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 11:11:28,749 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 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, 1, 1, 1] [2023-12-21 11:11:28,756 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-12-21 11:11:28,954 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 [2023-12-21 11:11:28,954 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 11:11:28,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 11:11:28,954 INFO L85 PathProgramCache]: Analyzing trace with hash 921243194, now seen corresponding path program 3 times [2023-12-21 11:11:28,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 11:11:28,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368077738] [2023-12-21 11:11:28,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:11:28,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 11:11:28,969 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 11:11:28,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1444106871] [2023-12-21 11:11:28,969 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-21 11:11:28,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 11:11:28,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 11:11:28,985 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) [2023-12-21 11:11:28,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-12-21 11:11:29,166 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-12-21 11:11:29,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 11:11:29,169 INFO L262 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 193 conjunts are in the unsatisfiable core [2023-12-21 11:11:29,174 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 11:11:29,186 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 [2023-12-21 11:11:29,191 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 [2023-12-21 11:11:29,200 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 [2023-12-21 11:11:29,569 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 [2023-12-21 11:11:30,246 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 42 treesize of output 30 [2023-12-21 11:11:30,396 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 27 treesize of output 19 [2023-12-21 11:11:30,404 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 [2023-12-21 11:11:30,408 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 [2023-12-21 11:11:30,896 INFO L134 CoverageAnalysis]: Checked inductivity of 461 backedges. 219 proven. 95 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2023-12-21 11:11:30,896 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 11:11:41,174 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 127 treesize of output 111 [2023-12-21 11:11:44,765 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 190 treesize of output 174 [2023-12-21 11:11:44,994 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 33 treesize of output 29 [2023-12-21 11:11:48,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 11:11:48,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368077738] [2023-12-21 11:11:48,217 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 11:11:48,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444106871] [2023-12-21 11:11:48,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444106871] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 11:11:48,217 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-21 11:11:48,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2023-12-21 11:11:48,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387180346] [2023-12-21 11:11:48,217 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-21 11:11:48,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-12-21 11:11:48,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 11:11:48,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-12-21 11:11:48,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1497, Unknown=1, NotChecked=0, Total=1640 [2023-12-21 11:11:48,218 INFO L87 Difference]: Start difference. First operand 81 states and 87 transitions. Second operand has 29 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 24 states have internal predecessors, (45), 11 states have call successors, (16), 7 states have call predecessors, (16), 9 states have return successors, (16), 8 states have call predecessors, (16), 10 states have call successors, (16) [2023-12-21 11:11:51,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 11:11:51,405 INFO L93 Difference]: Finished difference Result 101 states and 108 transitions. [2023-12-21 11:11:51,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-12-21 11:11:51,405 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 24 states have internal predecessors, (45), 11 states have call successors, (16), 7 states have call predecessors, (16), 9 states have return successors, (16), 8 states have call predecessors, (16), 10 states have call successors, (16) Word has length 114 [2023-12-21 11:11:51,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 11:11:51,406 INFO L225 Difference]: With dead ends: 101 [2023-12-21 11:11:51,406 INFO L226 Difference]: Without dead ends: 83 [2023-12-21 11:11:51,407 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 96 SyntacticMatches, 4 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 817 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=417, Invalid=3242, Unknown=1, NotChecked=0, Total=3660 [2023-12-21 11:11:51,407 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 59 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 812 mSolverCounterSat, 41 mSolverCounterUnsat, 14 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 867 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 812 IncrementalHoareTripleChecker+Invalid, 14 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-12-21 11:11:51,407 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 127 Invalid, 867 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 812 Invalid, 14 Unknown, 0 Unchecked, 1.2s Time] [2023-12-21 11:11:51,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2023-12-21 11:11:51,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2023-12-21 11:11:51,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 54 states have (on average 1.0185185185185186) internal successors, (55), 54 states have internal predecessors, (55), 15 states have call successors, (15), 12 states have call predecessors, (15), 13 states have return successors, (19), 16 states have call predecessors, (19), 14 states have call successors, (19) [2023-12-21 11:11:51,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 89 transitions. [2023-12-21 11:11:51,424 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 89 transitions. Word has length 114 [2023-12-21 11:11:51,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 11:11:51,424 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 89 transitions. [2023-12-21 11:11:51,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 24 states have internal predecessors, (45), 11 states have call successors, (16), 7 states have call predecessors, (16), 9 states have return successors, (16), 8 states have call predecessors, (16), 10 states have call successors, (16) [2023-12-21 11:11:51,424 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 89 transitions. [2023-12-21 11:11:51,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2023-12-21 11:11:51,425 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 11:11:51,425 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 17, 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, 1, 1, 1] [2023-12-21 11:11:51,432 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-12-21 11:11:51,630 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 [2023-12-21 11:11:51,631 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 11:11:51,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 11:11:51,631 INFO L85 PathProgramCache]: Analyzing trace with hash 1966560104, now seen corresponding path program 4 times [2023-12-21 11:11:51,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 11:11:51,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360671246] [2023-12-21 11:11:51,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:11:51,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 11:11:51,644 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 11:11:51,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1593185028] [2023-12-21 11:11:51,645 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-21 11:11:51,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 11:11:51,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 11:11:51,646 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) [2023-12-21 11:11:51,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-12-21 11:11:51,854 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-21 11:11:51,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 11:11:51,857 INFO L262 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 120 conjunts are in the unsatisfiable core [2023-12-21 11:11:51,860 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 11:11:52,090 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 [2023-12-21 11:11:52,094 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 [2023-12-21 11:11:52,453 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 [2023-12-21 11:11:52,456 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 [2023-12-21 11:11:52,519 INFO L134 CoverageAnalysis]: Checked inductivity of 694 backedges. 215 proven. 28 refuted. 0 times theorem prover too weak. 451 trivial. 0 not checked. [2023-12-21 11:11:52,519 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 11:11:53,885 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 78 treesize of output 66 [2023-12-21 11:11:53,889 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 110 treesize of output 102 [2023-12-21 11:11:54,421 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 118 treesize of output 114 [2023-12-21 11:11:54,425 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 126 treesize of output 102 [2023-12-21 11:11:54,740 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 78 treesize of output 66 [2023-12-21 11:11:54,743 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 110 treesize of output 102 [2023-12-21 11:11:56,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 11:11:56,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360671246] [2023-12-21 11:11:56,194 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 11:11:56,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593185028] [2023-12-21 11:11:56,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593185028] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 11:11:56,195 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-21 11:11:56,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2023-12-21 11:11:56,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286096495] [2023-12-21 11:11:56,195 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-21 11:11:56,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-12-21 11:11:56,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 11:11:56,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-12-21 11:11:56,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2023-12-21 11:11:56,196 INFO L87 Difference]: Start difference. First operand 83 states and 89 transitions. Second operand has 17 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 6 states have call successors, (12), 4 states have call predecessors, (12), 6 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2023-12-21 11:11:57,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 11:11:57,054 INFO L93 Difference]: Finished difference Result 83 states and 89 transitions. [2023-12-21 11:11:57,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-21 11:11:57,054 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 6 states have call successors, (12), 4 states have call predecessors, (12), 6 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 138 [2023-12-21 11:11:57,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 11:11:57,054 INFO L225 Difference]: With dead ends: 83 [2023-12-21 11:11:57,054 INFO L226 Difference]: Without dead ends: 0 [2023-12-21 11:11:57,055 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 151 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=153, Invalid=777, Unknown=0, NotChecked=0, Total=930 [2023-12-21 11:11:57,055 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 27 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-21 11:11:57,056 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 49 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-21 11:11:57,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-12-21 11:11:57,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-12-21 11:11:57,056 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) [2023-12-21 11:11:57,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-12-21 11:11:57,056 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 138 [2023-12-21 11:11:57,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 11:11:57,056 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-12-21 11:11:57,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 6 states have call successors, (12), 4 states have call predecessors, (12), 6 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2023-12-21 11:11:57,056 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-12-21 11:11:57,057 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-12-21 11:11:57,058 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-21 11:11:57,070 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-12-21 11:11:57,259 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 [2023-12-21 11:11:57,261 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2023-12-21 11:12:01,129 INFO L899 garLoopResultBuilder]: For program point L56(lines 56 62) no Hoare annotation was computed. [2023-12-21 11:12:01,129 INFO L895 garLoopResultBuilder]: At program point L55(line 55) the Hoare annotation is: (let ((.cse0 (select (select |old(#memory_int#4)| |func_to_recursive_line_29_to_40_0_#in~t.base|) |func_to_recursive_line_29_to_40_0_#in~t.offset|))) (or (not (= (+ (* (select (select |old(#memory_int#3)| |func_to_recursive_line_29_to_40_0_#in~a.base|) |func_to_recursive_line_29_to_40_0_#in~a.offset|) 2) 1) .cse0)) (let ((.cse1 (select (select |#memory_int#4| |func_to_recursive_line_29_to_40_0_#in~t.base|) |func_to_recursive_line_29_to_40_0_#in~t.offset|))) (and (= .cse1 |func_to_recursive_line_29_to_40_0_#t~mem9|) (= func_to_recursive_line_29_to_40_0_~t.offset |func_to_recursive_line_29_to_40_0_#in~t.offset|) (= |#memory_int#4| |old(#memory_int#4)|) (= (* |func_to_recursive_line_29_to_40_0_#t~mem11| 4) (+ (* 2 |func_to_recursive_line_29_to_40_0_#t~mem12|) (* |func_to_recursive_line_29_to_40_0_#t~mem9| |func_to_recursive_line_29_to_40_0_#t~mem10|) 1)) (= |#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~mem10|) (= 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#2| |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_~s.base |func_to_recursive_line_29_to_40_0_#in~s.base|))) (not (= (* (select (select |old(#memory_int#2)| |func_to_recursive_line_29_to_40_0_#in~s.base|) |func_to_recursive_line_29_to_40_0_#in~s.offset|) 4) (+ (* 2 .cse0) 1 (* .cse0 .cse0)))))) [2023-12-21 11:12:01,130 INFO L895 garLoopResultBuilder]: At program point L54(line 54) the Hoare annotation is: (let ((.cse0 (select (select |old(#memory_int#4)| |func_to_recursive_line_29_to_40_0_#in~t.base|) |func_to_recursive_line_29_to_40_0_#in~t.offset|))) (or (not (= (+ (* (select (select |old(#memory_int#3)| |func_to_recursive_line_29_to_40_0_#in~a.base|) |func_to_recursive_line_29_to_40_0_#in~a.offset|) 2) 1) .cse0)) (and (= func_to_recursive_line_29_to_40_0_~t.offset |func_to_recursive_line_29_to_40_0_#in~t.offset|) (= |#memory_int#4| |old(#memory_int#4)|) (= |#memory_int#2| |old(#memory_int#2)|) (exists ((v_subst_14 Int) (v_subst_13 Int)) (let ((.cse1 (select (select |#memory_int#3| v_subst_14) v_subst_13))) (and (= (select (select |#memory_int#4| |func_to_recursive_line_29_to_40_0_#in~t.base|) |func_to_recursive_line_29_to_40_0_#in~t.offset|) (+ (* .cse1 2) 1)) (= .cse1 |func_to_recursive_line_29_to_40_0_#t~mem6|) (= .cse1 |func_to_recursive_line_29_to_40_0_#t~mem7|)))) (= 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|) (= (+ |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|) (= 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 (= (* (select (select |old(#memory_int#2)| |func_to_recursive_line_29_to_40_0_#in~s.base|) |func_to_recursive_line_29_to_40_0_#in~s.offset|) 4) (+ (* 2 .cse0) 1 (* .cse0 .cse0)))))) [2023-12-21 11:12:01,130 INFO L899 garLoopResultBuilder]: For program point L55-1(line 55) no Hoare annotation was computed. [2023-12-21 11:12:01,130 INFO L895 garLoopResultBuilder]: At program point L53(line 53) the Hoare annotation is: (let ((.cse0 (select (select |old(#memory_int#4)| |func_to_recursive_line_29_to_40_0_#in~t.base|) |func_to_recursive_line_29_to_40_0_#in~t.offset|))) (or (not (= (+ (* (select (select |old(#memory_int#3)| |func_to_recursive_line_29_to_40_0_#in~a.base|) |func_to_recursive_line_29_to_40_0_#in~a.offset|) 2) 1) .cse0)) (and (= func_to_recursive_line_29_to_40_0_~t.offset |func_to_recursive_line_29_to_40_0_#in~t.offset|) (= |#memory_int#4| |old(#memory_int#4)|) (= |#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|) (= (+ (* 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|) (= (select (select |#memory_int#4| func_to_recursive_line_29_to_40_0_~t.base) func_to_recursive_line_29_to_40_0_~t.offset) |func_to_recursive_line_29_to_40_0_#t~mem5|)) (not (= (* (select (select |old(#memory_int#2)| |func_to_recursive_line_29_to_40_0_#in~s.base|) |func_to_recursive_line_29_to_40_0_#in~s.offset|) 4) (+ (* 2 .cse0) 1 (* .cse0 .cse0)))))) [2023-12-21 11:12:01,130 INFO L899 garLoopResultBuilder]: For program point L54-1(line 54) no Hoare annotation was computed. [2023-12-21 11:12:01,130 INFO L899 garLoopResultBuilder]: For program point L53-1(line 53) no Hoare annotation was computed. [2023-12-21 11:12:01,130 INFO L899 garLoopResultBuilder]: For program point L50(lines 50 71) no Hoare annotation was computed. [2023-12-21 11:12:01,130 INFO L899 garLoopResultBuilder]: For program point L50-1(lines 48 72) no Hoare annotation was computed. [2023-12-21 11:12:01,130 INFO L895 garLoopResultBuilder]: At program point $Ultimate##0(lines 48 72) the Hoare annotation is: (let ((.cse0 (select (select |old(#memory_int#4)| |func_to_recursive_line_29_to_40_0_#in~t.base|) |func_to_recursive_line_29_to_40_0_#in~t.offset|))) (or (not (= (+ (* (select (select |old(#memory_int#3)| |func_to_recursive_line_29_to_40_0_#in~a.base|) |func_to_recursive_line_29_to_40_0_#in~a.offset|) 2) 1) .cse0)) (and (= |#memory_int#4| |old(#memory_int#4)|) (= |#memory_int#2| |old(#memory_int#2)|) (= |#memory_int#3| |old(#memory_int#3)|)) (not (= (* (select (select |old(#memory_int#2)| |func_to_recursive_line_29_to_40_0_#in~s.base|) |func_to_recursive_line_29_to_40_0_#in~s.offset|) 4) (+ (* 2 .cse0) 1 (* .cse0 .cse0)))))) [2023-12-21 11:12:01,130 INFO L899 garLoopResultBuilder]: For program point func_to_recursive_line_29_to_40_0EXIT(lines 48 72) no Hoare annotation was computed. [2023-12-21 11:12:01,130 INFO L895 garLoopResultBuilder]: At program point L67(line 67) the Hoare annotation is: (let ((.cse5 (select |old(#memory_int#4)| |func_to_recursive_line_29_to_40_0_#in~t.base|))) (let ((.cse6 (select .cse5 |func_to_recursive_line_29_to_40_0_#in~t.offset|))) (or (let ((.cse1 (select |old(#memory_int#3)| func_to_recursive_line_29_to_40_0_~a.base))) (let ((.cse2 (select .cse1 func_to_recursive_line_29_to_40_0_~a.offset))) (and (= |#memory_int#2| (store |old(#memory_int#2)| func_to_recursive_line_29_to_40_0_~s.base (let ((.cse0 (select |old(#memory_int#2)| func_to_recursive_line_29_to_40_0_~s.base))) (store .cse0 func_to_recursive_line_29_to_40_0_~s.offset (+ (select (select |#memory_int#4| func_to_recursive_line_29_to_40_0_~t.base) func_to_recursive_line_29_to_40_0_~t.offset) (select .cse0 func_to_recursive_line_29_to_40_0_~s.offset)))))) (= |#memory_int#3| (store |old(#memory_int#3)| func_to_recursive_line_29_to_40_0_~a.base (store .cse1 func_to_recursive_line_29_to_40_0_~a.offset (+ .cse2 1)))) (= func_to_recursive_line_29_to_40_0_~a.base |func_to_recursive_line_29_to_40_0_#in~a.base|) (= (+ (* 2 .cse2) 1) (select (select |old(#memory_int#4)| func_to_recursive_line_29_to_40_0_~t.base) func_to_recursive_line_29_to_40_0_~t.offset)) (exists ((func_to_recursive_line_29_to_40_0_~a.offset Int) (func_to_recursive_line_29_to_40_0_~a.base Int)) (let ((.cse4 (select (select |#memory_int#3| func_to_recursive_line_29_to_40_0_~a.base) func_to_recursive_line_29_to_40_0_~a.offset))) (let ((.cse3 (* 2 .cse4))) (and (= (+ .cse3 (* .cse4 .cse4) 1) (select (select |#memory_int#2| |func_to_recursive_line_29_to_40_0_#in~s.base|) |func_to_recursive_line_29_to_40_0_#in~s.offset|)) (= (select (select |#memory_int#4| |func_to_recursive_line_29_to_40_0_#in~t.base|) |func_to_recursive_line_29_to_40_0_#in~t.offset|) (+ .cse3 1)))))) (= |#memory_int#4| (store |old(#memory_int#4)| |func_to_recursive_line_29_to_40_0_#in~t.base| (store .cse5 |func_to_recursive_line_29_to_40_0_#in~t.offset| (+ 2 .cse6)))) (= func_to_recursive_line_29_to_40_0_~a.offset |func_to_recursive_line_29_to_40_0_#in~a.offset|)))) (not (= (+ (* (select (select |old(#memory_int#3)| |func_to_recursive_line_29_to_40_0_#in~a.base|) |func_to_recursive_line_29_to_40_0_#in~a.offset|) 2) 1) .cse6)) (not (= (* (select (select |old(#memory_int#2)| |func_to_recursive_line_29_to_40_0_#in~s.base|) |func_to_recursive_line_29_to_40_0_#in~s.offset|) 4) (+ (* 2 .cse6) 1 (* .cse6 .cse6))))))) [2023-12-21 11:12:01,130 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2023-12-21 11:12:01,130 INFO L895 garLoopResultBuilder]: At program point L87(line 87) the Hoare annotation is: (let ((.cse3 (select |#memory_int#3| |ULTIMATE.start_main_~#a~0#1.base|)) (.cse1 (select (select |#memory_int#2| |ULTIMATE.start_main_~#s~0#1.base|) 0)) (.cse2 (= |ULTIMATE.start_main_~#s~0#1.offset| 0)) (.cse0 (select |#memory_int#4| |ULTIMATE.start_main_~#t~0#1.base|))) (or (and (= |ULTIMATE.start_main_#t~mem26#1| 1) (= (select .cse0 0) 1) (= |ULTIMATE.start_main_#t~mem27#1| 1) (= .cse1 1) (= |ULTIMATE.start_main_~#t~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem28#1| 1) (= |ULTIMATE.start_main_#t~mem25#1| 1) .cse2 (= (select .cse3 |ULTIMATE.start_main_~#a~0#1.offset|) 0)) (let ((.cse4 (select .cse0 |ULTIMATE.start_main_~#t~0#1.offset|))) (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)) (= (+ (* 2 (select .cse3 0)) 1) .cse4) (= |ULTIMATE.start_main_#t~mem26#1| |ULTIMATE.start_main_#t~mem25#1|) (= |ULTIMATE.start_main_#t~mem28#1| |ULTIMATE.start_main_#t~mem26#1|) (= (+ (* .cse4 .cse4) (* .cse4 2) 1) (* .cse1 4)) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) .cse2)))) [2023-12-21 11:12:01,131 INFO L895 garLoopResultBuilder]: At program point L86(line 86) the Hoare annotation is: (let ((.cse4 (select |#memory_int#4| |ULTIMATE.start_main_~#t~0#1.base|)) (.cse2 (select (select |#memory_int#2| |ULTIMATE.start_main_~#s~0#1.base|) 0)) (.cse3 (= |ULTIMATE.start_main_~#s~0#1.offset| 0)) (.cse0 (select |#memory_int#3| |ULTIMATE.start_main_~#a~0#1.base|))) (or (let ((.cse1 (select .cse4 |ULTIMATE.start_main_~#t~0#1.offset|))) (and (= (+ (* 2 (select .cse0 0)) 1) .cse1) (= (+ (* |ULTIMATE.start_main_#t~mem23#1| |ULTIMATE.start_main_#t~mem23#1|) (* 2 |ULTIMATE.start_main_#t~mem23#1|) 1) |ULTIMATE.start_main_#t~mem24#1|) (= (+ (* .cse1 .cse1) (* .cse1 2) 1) (* .cse2 4)) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) .cse3 (= |ULTIMATE.start_main_#t~mem23#1| |ULTIMATE.start_main_#t~mem22#1|))) (and (= (select .cse4 0) 1) (= |ULTIMATE.start_main_#t~mem22#1| 0) (= .cse2 1) (= |ULTIMATE.start_main_~#t~0#1.offset| 0) .cse3 (= |ULTIMATE.start_main_#t~mem24#1| 1) (= (select .cse0 |ULTIMATE.start_main_~#a~0#1.offset|) 0) (= |ULTIMATE.start_main_#t~mem23#1| 0)))) [2023-12-21 11:12:01,131 INFO L899 garLoopResultBuilder]: For program point L87-1(line 87) no Hoare annotation was computed. [2023-12-21 11:12:01,131 INFO L895 garLoopResultBuilder]: At program point L85(line 85) the Hoare annotation is: (let ((.cse4 (select |#memory_int#4| |ULTIMATE.start_main_~#t~0#1.base|)) (.cse2 (select (select |#memory_int#2| |ULTIMATE.start_main_~#s~0#1.base|) 0)) (.cse3 (= |ULTIMATE.start_main_~#s~0#1.offset| 0)) (.cse0 (select |#memory_int#3| |ULTIMATE.start_main_~#a~0#1.base|))) (or (let ((.cse1 (select .cse4 |ULTIMATE.start_main_~#t~0#1.offset|))) (and (= (+ (* 2 (select .cse0 0)) 1) .cse1) (= (+ (* .cse1 .cse1) (* .cse1 2) 1) (* .cse2 4)) (= (+ (* 2 |ULTIMATE.start_main_#t~mem20#1|) 1) |ULTIMATE.start_main_#t~mem21#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) .cse3)) (and (= |ULTIMATE.start_main_#t~mem20#1| 0) (= (select .cse4 0) 1) (= .cse2 1) (= |ULTIMATE.start_main_~#t~0#1.offset| 0) .cse3 (= (select .cse0 |ULTIMATE.start_main_~#a~0#1.offset|) 0) (= |ULTIMATE.start_main_#t~mem21#1| 1)))) [2023-12-21 11:12:01,131 INFO L899 garLoopResultBuilder]: For program point L86-1(line 86) no Hoare annotation was computed. [2023-12-21 11:12:01,131 INFO L895 garLoopResultBuilder]: At program point L84(line 84) the Hoare annotation is: (and (= (select (select |#memory_int#4| |ULTIMATE.start_main_~#t~0#1.base|) 0) 1) (= (select (select |#memory_int#2| |ULTIMATE.start_main_~#s~0#1.base|) 0) 1) (= |ULTIMATE.start_main_~#t~0#1.offset| 0) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= (select (select |#memory_int#3| |ULTIMATE.start_main_~#a~0#1.base|) 0) 0) (= |ULTIMATE.start_main_~#s~0#1.offset| 0)) [2023-12-21 11:12:01,131 INFO L899 garLoopResultBuilder]: For program point L85-1(line 85) no Hoare annotation was computed. [2023-12-21 11:12:01,131 INFO L899 garLoopResultBuilder]: For program point L84-1(line 84) no Hoare annotation was computed. [2023-12-21 11:12:01,131 INFO L899 garLoopResultBuilder]: For program point $Ultimate##0(line -1) no Hoare annotation was computed. [2023-12-21 11:12:01,131 INFO L899 garLoopResultBuilder]: For program point L34-2(lines 32 46) no Hoare annotation was computed. [2023-12-21 11:12:01,131 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 32 46) no Hoare annotation was computed. [2023-12-21 11:12:01,131 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 32 46) the Hoare annotation is: true [2023-12-21 11:12:01,131 INFO L899 garLoopResultBuilder]: For program point L36(lines 36 39) no Hoare annotation was computed. [2023-12-21 11:12:01,131 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 38) no Hoare annotation was computed. [2023-12-21 11:12:01,131 INFO L899 garLoopResultBuilder]: For program point L34(lines 34 44) no Hoare annotation was computed. [2023-12-21 11:12:01,133 INFO L445 BasicCegarLoop]: Path program histogram: [4, 4, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 11:12:01,134 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-21 11:12:01,137 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.12 11:12:01 BoogieIcfgContainer [2023-12-21 11:12:01,137 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-21 11:12:01,138 INFO L158 Benchmark]: Toolchain (without parser) took 119490.80ms. Allocated memory was 287.3MB in the beginning and 392.2MB in the end (delta: 104.9MB). Free memory was 245.1MB in the beginning and 243.3MB in the end (delta: 1.7MB). Peak memory consumption was 234.5MB. Max. memory is 8.0GB. [2023-12-21 11:12:01,138 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 216.0MB. Free memory is still 164.3MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-21 11:12:01,138 INFO L158 Benchmark]: CACSL2BoogieTranslator took 175.31ms. Allocated memory is still 287.3MB. Free memory was 244.7MB in the beginning and 233.4MB in the end (delta: 11.3MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-12-21 11:12:01,138 INFO L158 Benchmark]: Boogie Procedure Inliner took 25.49ms. Allocated memory is still 287.3MB. Free memory was 233.4MB in the beginning and 231.8MB in the end (delta: 1.7MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-12-21 11:12:01,138 INFO L158 Benchmark]: Boogie Preprocessor took 24.52ms. Allocated memory is still 287.3MB. Free memory was 231.8MB in the beginning and 229.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-21 11:12:01,138 INFO L158 Benchmark]: RCFGBuilder took 320.73ms. Allocated memory is still 287.3MB. Free memory was 229.7MB in the beginning and 214.0MB in the end (delta: 15.7MB). Peak memory consumption was 15.7MB. Max. memory is 8.0GB. [2023-12-21 11:12:01,138 INFO L158 Benchmark]: TraceAbstraction took 118938.07ms. Allocated memory was 287.3MB in the beginning and 392.2MB in the end (delta: 104.9MB). Free memory was 213.6MB in the beginning and 243.3MB in the end (delta: -29.7MB). Peak memory consumption was 203.1MB. Max. memory is 8.0GB. [2023-12-21 11:12:01,139 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 216.0MB. Free memory is still 164.3MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 175.31ms. Allocated memory is still 287.3MB. Free memory was 244.7MB in the beginning and 233.4MB in the end (delta: 11.3MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 25.49ms. Allocated memory is still 287.3MB. Free memory was 233.4MB in the beginning and 231.8MB in the end (delta: 1.7MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 24.52ms. Allocated memory is still 287.3MB. Free memory was 231.8MB in the beginning and 229.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 320.73ms. Allocated memory is still 287.3MB. Free memory was 229.7MB in the beginning and 214.0MB in the end (delta: 15.7MB). Peak memory consumption was 15.7MB. Max. memory is 8.0GB. * TraceAbstraction took 118938.07ms. Allocated memory was 287.3MB in the beginning and 392.2MB in the end (delta: 104.9MB). Free memory was 213.6MB in the beginning and 243.3MB in the end (delta: -29.7MB). Peak memory consumption was 203.1MB. 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: 118.9s, OverallIterations: 17, TraceHistogramMax: 18, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 29.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 3.9s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 55 mSolverCounterUnknown, 747 SdHoareTripleChecker+Valid, 15.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 723 mSDsluCounter, 1420 SdHoareTripleChecker+Invalid, 14.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1176 mSDsCounter, 496 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 5972 IncrementalHoareTripleChecker+Invalid, 6523 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 496 mSolverCounterUnsat, 244 mSDtfsCounter, 5972 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1574 GetRequests, 1012 SyntacticMatches, 34 SemanticMatches, 528 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4048 ImplicationChecksByTransitivity, 57.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=95occurred in iteration=6, InterpolantAutomatonStates: 286, 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, 63 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 10 LocationsWithAnnotation, 54 PreInvPairs, 78 NumberOfFragments, 865 HoareAnnotationTreeSize, 54 FormulaSimplifications, 3934 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 10 FormulaSimplificationsInter, 12292 FormulaSimplificationTreeSizeReductionInter, 3.7s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 80.0s InterpolantComputationTime, 1092 NumberOfCodeBlocks, 1034 NumberOfCodeBlocksAsserted, 26 NumberOfCheckSat, 1136 ConstructedInterpolants, 152 QuantifiedInterpolants, 16101 SizeOfPredicates, 418 NumberOfNonLiveVariables, 5194 ConjunctsInSsa, 1513 ConjunctsInUnsatCore, 20 InterpolantComputations, 3 PerfectInterpolantSequences, 2709/3277 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! [2023-12-21 11:12:01,363 WARN L435 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forcibly destroying the process [2023-12-21 11:12:01,385 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 137 Received shutdown request...