/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.use.bitabs.translation true -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/nla-digbench-scaling/divbin2_valuebound10.i -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-15 22:12:55,378 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-15 22:12:55,414 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-15 22:12:55,417 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-15 22:12:55,417 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-15 22:12:55,430 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-15 22:12:55,431 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-15 22:12:55,431 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-15 22:12:55,431 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-15 22:12:55,432 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-15 22:12:55,432 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-15 22:12:55,432 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-15 22:12:55,432 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-15 22:12:55,433 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-15 22:12:55,433 INFO L153 SettingsManager]: * Use SBE=true [2023-12-15 22:12:55,433 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-15 22:12:55,433 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-15 22:12:55,434 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-15 22:12:55,434 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-15 22:12:55,434 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-15 22:12:55,434 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-15 22:12:55,434 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-15 22:12:55,435 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-15 22:12:55,435 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-15 22:12:55,435 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-15 22:12:55,435 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-15 22:12:55,435 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-15 22:12:55,436 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-15 22:12:55,436 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-15 22:12:55,436 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-15 22:12:55,436 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-15 22:12:55,436 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-15 22:12:55,437 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-15 22:12:55,437 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-15 22:12:55,437 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-15 22:12:55,437 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-15 22:12:55,437 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-15 22:12:55,437 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-15 22:12:55,438 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-15 22:12:55,438 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-15 22:12:55,438 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-15 22:12:55,438 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-15 22:12:55,438 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-15 22:12:55,439 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> true [2023-12-15 22:12:55,580 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-15 22:12:55,594 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-15 22:12:55,595 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-15 22:12:55,596 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-15 22:12:55,596 INFO L274 PluginConnector]: CDTParser initialized [2023-12-15 22:12:55,597 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/divbin2_valuebound10.i [2023-12-15 22:12:56,570 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-15 22:12:56,709 INFO L384 CDTParser]: Found 1 translation units. [2023-12-15 22:12:56,710 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/divbin2_valuebound10.i [2023-12-15 22:12:56,715 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c1b8d4423/7e3dddb4ec83437987cf81900ea11d53/FLAG640a5c215 [2023-12-15 22:12:56,723 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c1b8d4423/7e3dddb4ec83437987cf81900ea11d53 [2023-12-15 22:12:56,725 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-15 22:12:56,727 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-15 22:12:56,728 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-15 22:12:56,729 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-15 22:12:56,732 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-15 22:12:56,732 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 10:12:56" (1/1) ... [2023-12-15 22:12:56,733 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a639b15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:12:56, skipping insertion in model container [2023-12-15 22:12:56,733 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 10:12:56" (1/1) ... [2023-12-15 22:12:56,747 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-15 22:12:56,863 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/divbin2_valuebound10.i[951,964] [2023-12-15 22:12:56,873 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-15 22:12:56,878 INFO L202 MainTranslator]: Completed pre-run [2023-12-15 22:12:56,886 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/divbin2_valuebound10.i[951,964] [2023-12-15 22:12:56,889 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-15 22:12:56,896 INFO L206 MainTranslator]: Completed translation [2023-12-15 22:12:56,897 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:12:56 WrapperNode [2023-12-15 22:12:56,897 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-15 22:12:56,898 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-15 22:12:56,898 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-15 22:12:56,898 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-15 22:12:56,902 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:12:56" (1/1) ... [2023-12-15 22:12:56,906 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:12:56" (1/1) ... [2023-12-15 22:12:56,915 INFO L138 Inliner]: procedures = 16, calls = 9, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 46 [2023-12-15 22:12:56,915 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-15 22:12:56,916 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-15 22:12:56,916 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-15 22:12:56,916 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-15 22:12:56,921 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:12:56" (1/1) ... [2023-12-15 22:12:56,922 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:12:56" (1/1) ... [2023-12-15 22:12:56,922 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:12:56" (1/1) ... [2023-12-15 22:12:56,928 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2023-12-15 22:12:56,928 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:12:56" (1/1) ... [2023-12-15 22:12:56,928 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:12:56" (1/1) ... [2023-12-15 22:12:56,930 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:12:56" (1/1) ... [2023-12-15 22:12:56,932 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:12:56" (1/1) ... [2023-12-15 22:12:56,932 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:12:56" (1/1) ... [2023-12-15 22:12:56,933 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:12:56" (1/1) ... [2023-12-15 22:12:56,934 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-15 22:12:56,934 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-15 22:12:56,934 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-15 22:12:56,934 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-15 22:12:56,935 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:12:56" (1/1) ... [2023-12-15 22:12:56,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-15 22:12:56,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 22:12:56,957 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) [2023-12-15 22:12:56,966 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 [2023-12-15 22:12:56,978 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-15 22:12:56,979 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-15 22:12:56,979 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-15 22:12:56,979 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-15 22:12:56,979 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-12-15 22:12:56,979 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-12-15 22:12:57,015 INFO L241 CfgBuilder]: Building ICFG [2023-12-15 22:12:57,016 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-15 22:12:57,106 INFO L282 CfgBuilder]: Performing block encoding [2023-12-15 22:12:57,119 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-15 22:12:57,119 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-12-15 22:12:57,119 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 10:12:57 BoogieIcfgContainer [2023-12-15 22:12:57,119 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-15 22:12:57,121 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-15 22:12:57,121 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-15 22:12:57,123 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-15 22:12:57,123 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 10:12:56" (1/3) ... [2023-12-15 22:12:57,123 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d36b75d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 10:12:57, skipping insertion in model container [2023-12-15 22:12:57,123 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:12:56" (2/3) ... [2023-12-15 22:12:57,124 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d36b75d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 10:12:57, skipping insertion in model container [2023-12-15 22:12:57,124 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 10:12:57" (3/3) ... [2023-12-15 22:12:57,124 INFO L112 eAbstractionObserver]: Analyzing ICFG divbin2_valuebound10.i [2023-12-15 22:12:57,135 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-15 22:12:57,135 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-15 22:12:57,169 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-15 22:12:57,173 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;@3f73d3ae, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-15 22:12:57,173 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-15 22:12:57,176 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-15 22:12:57,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-12-15 22:12:57,180 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 22:12:57,180 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 22:12:57,180 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 22:12:57,183 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 22:12:57,183 INFO L85 PathProgramCache]: Analyzing trace with hash 334653711, now seen corresponding path program 1 times [2023-12-15 22:12:57,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 22:12:57,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452813928] [2023-12-15 22:12:57,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:12:57,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 22:12:57,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:12:57,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 22:12:57,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452813928] [2023-12-15 22:12:57,256 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-12-15 22:12:57,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193702518] [2023-12-15 22:12:57,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:12:57,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 22:12:57,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 22:12:57,259 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) [2023-12-15 22:12:57,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-15 22:12:57,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:12:57,326 INFO L262 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 1 conjunts are in the unsatisfiable core [2023-12-15 22:12:57,328 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 22:12:57,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:12:57,340 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-15 22:12:57,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193702518] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 22:12:57,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 22:12:57,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-15 22:12:57,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973194650] [2023-12-15 22:12:57,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 22:12:57,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-15 22:12:57,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 22:12:57,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-15 22:12:57,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-15 22:12:57,362 INFO L87 Difference]: Start difference. First operand has 18 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 22:12:57,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 22:12:57,376 INFO L93 Difference]: Finished difference Result 34 states and 53 transitions. [2023-12-15 22:12:57,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-15 22:12:57,378 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-12-15 22:12:57,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 22:12:57,382 INFO L225 Difference]: With dead ends: 34 [2023-12-15 22:12:57,382 INFO L226 Difference]: Without dead ends: 16 [2023-12-15 22:12:57,383 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-15 22:12:57,385 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-15 22:12:57,386 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 19 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-15 22:12:57,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2023-12-15 22:12:57,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2023-12-15 22:12:57,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-15 22:12:57,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2023-12-15 22:12:57,405 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 9 [2023-12-15 22:12:57,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 22:12:57,405 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2023-12-15 22:12:57,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 22:12:57,406 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2023-12-15 22:12:57,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-12-15 22:12:57,406 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 22:12:57,406 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 22:12:57,424 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-15 22:12:57,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-12-15 22:12:57,611 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 22:12:57,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 22:12:57,611 INFO L85 PathProgramCache]: Analyzing trace with hash -401566674, now seen corresponding path program 1 times [2023-12-15 22:12:57,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 22:12:57,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353730930] [2023-12-15 22:12:57,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:12:57,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 22:12:57,623 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 22:12:57,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1499227099] [2023-12-15 22:12:57,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:12:57,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 22:12:57,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 22:12:57,629 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) [2023-12-15 22:12:57,657 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-15 22:12:57,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:12:57,677 INFO L262 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 20 conjunts are in the unsatisfiable core [2023-12-15 22:12:57,679 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 22:12:57,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:12:57,879 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-15 22:12:57,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 22:12:57,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353730930] [2023-12-15 22:12:57,879 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 22:12:57,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499227099] [2023-12-15 22:12:57,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499227099] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 22:12:57,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 22:12:57,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-15 22:12:57,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923363392] [2023-12-15 22:12:57,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 22:12:57,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-15 22:12:57,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 22:12:57,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-15 22:12:57,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-12-15 22:12:57,881 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 8 states, 8 states have (on average 1.125) internal successors, (9), 6 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 22:12:57,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 22:12:57,938 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2023-12-15 22:12:57,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-15 22:12:57,938 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.125) internal successors, (9), 6 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-12-15 22:12:57,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 22:12:57,939 INFO L225 Difference]: With dead ends: 28 [2023-12-15 22:12:57,939 INFO L226 Difference]: Without dead ends: 25 [2023-12-15 22:12:57,939 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2023-12-15 22:12:57,940 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 17 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-15 22:12:57,940 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 48 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-15 22:12:57,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-12-15 22:12:57,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2023-12-15 22:12:57,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 19 states have (on average 1.263157894736842) internal successors, (24), 20 states have internal predecessors, (24), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-15 22:12:57,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2023-12-15 22:12:57,945 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 10 [2023-12-15 22:12:57,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 22:12:57,945 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2023-12-15 22:12:57,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.125) internal successors, (9), 6 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 22:12:57,945 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2023-12-15 22:12:57,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-12-15 22:12:57,945 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 22:12:57,945 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 22:12:57,964 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-15 22:12:58,149 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,SelfDestructingSolverStorable1 [2023-12-15 22:12:58,150 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 22:12:58,150 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 22:12:58,150 INFO L85 PathProgramCache]: Analyzing trace with hash 1504476233, now seen corresponding path program 1 times [2023-12-15 22:12:58,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 22:12:58,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693204180] [2023-12-15 22:12:58,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:12:58,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 22:12:58,171 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 22:12:58,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1222085511] [2023-12-15 22:12:58,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:12:58,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 22:12:58,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 22:12:58,173 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) [2023-12-15 22:12:58,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-15 22:12:58,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:12:58,201 INFO L262 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 20 conjunts are in the unsatisfiable core [2023-12-15 22:12:58,202 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 22:12:58,304 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:12:58,304 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 22:12:58,388 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:12:58,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 22:12:58,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693204180] [2023-12-15 22:12:58,389 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 22:12:58,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222085511] [2023-12-15 22:12:58,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222085511] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-15 22:12:58,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-15 22:12:58,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 12 [2023-12-15 22:12:58,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615653405] [2023-12-15 22:12:58,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 22:12:58,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-15 22:12:58,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 22:12:58,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-15 22:12:58,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2023-12-15 22:12:58,391 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 22:13:02,531 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-12-15 22:13:06,546 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-12-15 22:13:10,575 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-12-15 22:13:10,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 22:13:10,635 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2023-12-15 22:13:10,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-15 22:13:10,636 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-12-15 22:13:10,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 22:13:10,637 INFO L225 Difference]: With dead ends: 39 [2023-12-15 22:13:10,637 INFO L226 Difference]: Without dead ends: 37 [2023-12-15 22:13:10,637 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2023-12-15 22:13:10,638 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 9 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 3 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.2s IncrementalHoareTripleChecker+Time [2023-12-15 22:13:10,638 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 51 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 40 Invalid, 3 Unknown, 0 Unchecked, 12.2s Time] [2023-12-15 22:13:10,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-12-15 22:13:10,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 31. [2023-12-15 22:13:10,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 25 states have internal predecessors, (28), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-15 22:13:10,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2023-12-15 22:13:10,647 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 12 [2023-12-15 22:13:10,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 22:13:10,648 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2023-12-15 22:13:10,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 22:13:10,648 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2023-12-15 22:13:10,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-12-15 22:13:10,648 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 22:13:10,648 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 22:13:10,664 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-15 22:13:10,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 22:13:10,853 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 22:13:10,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 22:13:10,854 INFO L85 PathProgramCache]: Analyzing trace with hash 1989427041, now seen corresponding path program 1 times [2023-12-15 22:13:10,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 22:13:10,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187652720] [2023-12-15 22:13:10,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:13:10,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 22:13:10,861 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 22:13:10,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1570476618] [2023-12-15 22:13:10,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:13:10,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 22:13:10,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 22:13:10,880 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) [2023-12-15 22:13:10,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-15 22:13:10,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:13:10,929 INFO L262 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-15 22:13:10,931 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 22:13:10,953 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:13:10,953 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-15 22:13:10,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 22:13:10,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187652720] [2023-12-15 22:13:10,953 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 22:13:10,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570476618] [2023-12-15 22:13:10,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570476618] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 22:13:10,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 22:13:10,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-15 22:13:10,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473652411] [2023-12-15 22:13:10,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 22:13:10,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-15 22:13:10,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 22:13:10,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-15 22:13:10,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-15 22:13:10,957 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-15 22:13:10,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 22:13:10,981 INFO L93 Difference]: Finished difference Result 42 states and 48 transitions. [2023-12-15 22:13:10,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-15 22:13:10,982 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2023-12-15 22:13:10,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 22:13:10,983 INFO L225 Difference]: With dead ends: 42 [2023-12-15 22:13:10,983 INFO L226 Difference]: Without dead ends: 24 [2023-12-15 22:13:10,984 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-15 22:13:10,987 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-15 22:13:10,987 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 27 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-15 22:13:10,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-12-15 22:13:10,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-12-15 22:13:10,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 20 states have internal predecessors, (22), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-15 22:13:10,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2023-12-15 22:13:10,996 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 18 [2023-12-15 22:13:10,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 22:13:10,996 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2023-12-15 22:13:10,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-15 22:13:10,997 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2023-12-15 22:13:10,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-12-15 22:13:10,997 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 22:13:10,997 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 22:13:11,003 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-15 22:13:11,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 22:13:11,202 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 22:13:11,202 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 22:13:11,202 INFO L85 PathProgramCache]: Analyzing trace with hash -2022221855, now seen corresponding path program 1 times [2023-12-15 22:13:11,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 22:13:11,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864247549] [2023-12-15 22:13:11,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:13:11,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 22:13:11,216 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 22:13:11,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1026359290] [2023-12-15 22:13:11,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:13:11,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 22:13:11,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 22:13:11,217 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) [2023-12-15 22:13:11,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:13:11,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-15 22:13:11,244 INFO L262 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 11 conjunts are in the unsatisfiable core [2023-12-15 22:13:11,245 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 22:13:11,278 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-15 22:13:11,278 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 22:13:11,324 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-15 22:13:11,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 22:13:11,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864247549] [2023-12-15 22:13:11,324 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 22:13:11,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026359290] [2023-12-15 22:13:11,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026359290] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 22:13:11,325 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-15 22:13:11,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2023-12-15 22:13:11,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023035925] [2023-12-15 22:13:11,325 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-15 22:13:11,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-15 22:13:11,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 22:13:11,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-15 22:13:11,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-12-15 22:13:11,326 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-15 22:13:13,935 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.60s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-15 22:13:14,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 22:13:14,046 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2023-12-15 22:13:14,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-15 22:13:14,046 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2023-12-15 22:13:14,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 22:13:14,047 INFO L225 Difference]: With dead ends: 30 [2023-12-15 22:13:14,047 INFO L226 Difference]: Without dead ends: 23 [2023-12-15 22:13:14,047 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-12-15 22:13:14,048 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 14 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-12-15 22:13:14,048 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 42 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2023-12-15 22:13:14,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-12-15 22:13:14,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2023-12-15 22:13:14,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-15 22:13:14,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2023-12-15 22:13:14,052 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 18 [2023-12-15 22:13:14,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 22:13:14,052 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2023-12-15 22:13:14,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-15 22:13:14,052 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2023-12-15 22:13:14,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-12-15 22:13:14,052 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 22:13:14,052 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 22:13:14,058 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-15 22:13:14,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 22:13:14,256 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 22:13:14,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 22:13:14,257 INFO L85 PathProgramCache]: Analyzing trace with hash -989864836, now seen corresponding path program 1 times [2023-12-15 22:13:14,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 22:13:14,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178082993] [2023-12-15 22:13:14,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:13:14,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 22:13:14,264 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 22:13:14,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [53914258] [2023-12-15 22:13:14,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:13:14,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 22:13:14,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 22:13:14,266 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) [2023-12-15 22:13:14,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-15 22:13:14,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:13:14,317 INFO L262 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 32 conjunts are in the unsatisfiable core [2023-12-15 22:13:14,319 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 22:13:14,497 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:13:14,497 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 22:13:19,465 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:13:19,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 22:13:19,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178082993] [2023-12-15 22:13:19,465 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 22:13:19,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53914258] [2023-12-15 22:13:19,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53914258] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 22:13:19,465 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-15 22:13:19,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2023-12-15 22:13:19,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502840354] [2023-12-15 22:13:19,466 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-15 22:13:19,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-15 22:13:19,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 22:13:19,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-15 22:13:19,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2023-12-15 22:13:19,467 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 16 states have internal predecessors, (30), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-15 22:13:27,761 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-15 22:13:41,100 WARN L293 SmtUtils]: Spent 11.98s on a formula simplification that was a NOOP. DAG size: 37 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-15 22:13:50,233 WARN L293 SmtUtils]: Spent 9.09s on a formula simplification that was a NOOP. DAG size: 29 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-15 22:13:53,017 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.87s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-15 22:14:01,600 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-15 22:14:03,062 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-15 22:14:06,611 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.55s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-15 22:14:10,012 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.40s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-15 22:14:14,412 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-15 22:14:14,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 22:14:14,433 INFO L93 Difference]: Finished difference Result 70 states and 85 transitions. [2023-12-15 22:14:14,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-12-15 22:14:14,433 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 16 states have internal predecessors, (30), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2023-12-15 22:14:14,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 22:14:14,434 INFO L225 Difference]: With dead ends: 70 [2023-12-15 22:14:14,434 INFO L226 Difference]: Without dead ends: 60 [2023-12-15 22:14:14,435 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 32.6s TimeCoverageRelationStatistics Valid=159, Invalid=543, Unknown=0, NotChecked=0, Total=702 [2023-12-15 22:14:14,435 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 50 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 29 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 26.5s IncrementalHoareTripleChecker+Time [2023-12-15 22:14:14,435 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 80 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 142 Invalid, 3 Unknown, 0 Unchecked, 26.5s Time] [2023-12-15 22:14:14,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-12-15 22:14:14,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 55. [2023-12-15 22:14:14,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 42 states have (on average 1.1904761904761905) internal successors, (50), 46 states have internal predecessors, (50), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2023-12-15 22:14:14,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 66 transitions. [2023-12-15 22:14:14,449 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 66 transitions. Word has length 20 [2023-12-15 22:14:14,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 22:14:14,450 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 66 transitions. [2023-12-15 22:14:14,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 16 states have internal predecessors, (30), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-15 22:14:14,450 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 66 transitions. [2023-12-15 22:14:14,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-12-15 22:14:14,451 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 22:14:14,451 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 22:14:14,455 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-12-15 22:14:14,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 22:14:14,656 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 22:14:14,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 22:14:14,656 INFO L85 PathProgramCache]: Analyzing trace with hash 711086101, now seen corresponding path program 1 times [2023-12-15 22:14:14,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 22:14:14,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165450495] [2023-12-15 22:14:14,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:14:14,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 22:14:14,662 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 22:14:14,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [93392394] [2023-12-15 22:14:14,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:14:14,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 22:14:14,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 22:14:14,664 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) [2023-12-15 22:14:14,666 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-15 22:14:14,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:14:14,711 INFO L262 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-15 22:14:14,712 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 22:14:14,754 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:14:14,755 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 22:14:14,791 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-15 22:14:14,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 22:14:14,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165450495] [2023-12-15 22:14:14,791 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 22:14:14,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93392394] [2023-12-15 22:14:14,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93392394] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-15 22:14:14,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-15 22:14:14,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2023-12-15 22:14:14,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203562138] [2023-12-15 22:14:14,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 22:14:14,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-15 22:14:14,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 22:14:14,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-15 22:14:14,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-12-15 22:14:14,793 INFO L87 Difference]: Start difference. First operand 55 states and 66 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-15 22:14:14,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 22:14:14,847 INFO L93 Difference]: Finished difference Result 69 states and 83 transitions. [2023-12-15 22:14:14,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-15 22:14:14,847 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2023-12-15 22:14:14,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 22:14:14,848 INFO L225 Difference]: With dead ends: 69 [2023-12-15 22:14:14,848 INFO L226 Difference]: Without dead ends: 59 [2023-12-15 22:14:14,848 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-12-15 22:14:14,849 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-15 22:14:14,849 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 30 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-15 22:14:14,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-12-15 22:14:14,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2023-12-15 22:14:14,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 46 states have (on average 1.173913043478261) internal successors, (54), 48 states have internal predecessors, (54), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2023-12-15 22:14:14,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 70 transitions. [2023-12-15 22:14:14,864 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 70 transitions. Word has length 22 [2023-12-15 22:14:14,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 22:14:14,864 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 70 transitions. [2023-12-15 22:14:14,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-15 22:14:14,864 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 70 transitions. [2023-12-15 22:14:14,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-12-15 22:14:14,865 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 22:14:14,865 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 22:14:14,872 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-12-15 22:14:15,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 22:14:15,070 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 22:14:15,071 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 22:14:15,071 INFO L85 PathProgramCache]: Analyzing trace with hash 1184125773, now seen corresponding path program 2 times [2023-12-15 22:14:15,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 22:14:15,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091813858] [2023-12-15 22:14:15,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:14:15,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 22:14:15,092 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 22:14:15,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1958032945] [2023-12-15 22:14:15,093 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-15 22:14:15,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 22:14:15,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 22:14:15,096 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) [2023-12-15 22:14:15,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-15 22:14:15,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-15 22:14:15,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 22:14:15,146 INFO L262 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 38 conjunts are in the unsatisfiable core [2023-12-15 22:14:15,147 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 22:14:15,417 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:14:15,417 INFO L327 TraceCheckSpWp]: Computing backward predicates... Received shutdown request... [2023-12-15 22:14:16,499 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-15 22:14:16,518 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-15 22:14:16,642 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-15 22:14:16,647 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-12-15 22:14:16,842 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,SelfDestructingSolverStorable7 [2023-12-15 22:14:16,843 WARN L619 AbstractCegarLoop]: Verification canceled: while NwaCegarLoop was analyzing trace of length 27 with TraceHistMax 5,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ATOM-1 context. [2023-12-15 22:14:16,846 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1] [2023-12-15 22:14:16,848 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-15 22:14:16,854 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.12 10:14:16 BoogieIcfgContainer [2023-12-15 22:14:16,855 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-15 22:14:16,855 INFO L158 Benchmark]: Toolchain (without parser) took 80128.39ms. Allocated memory is still 274.7MB. Free memory was 218.4MB in the beginning and 218.0MB in the end (delta: 447.5kB). Peak memory consumption was 1.8MB. Max. memory is 8.0GB. [2023-12-15 22:14:16,855 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 220.2MB. Free memory is still 167.5MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-15 22:14:16,855 INFO L158 Benchmark]: CACSL2BoogieTranslator took 168.69ms. Allocated memory is still 274.7MB. Free memory was 218.4MB in the beginning and 206.7MB in the end (delta: 11.7MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-12-15 22:14:16,855 INFO L158 Benchmark]: Boogie Procedure Inliner took 17.70ms. Allocated memory is still 274.7MB. Free memory was 206.7MB in the beginning and 205.2MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-15 22:14:16,856 INFO L158 Benchmark]: Boogie Preprocessor took 18.20ms. Allocated memory is still 274.7MB. Free memory was 205.2MB in the beginning and 203.7MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-12-15 22:14:16,856 INFO L158 Benchmark]: RCFGBuilder took 185.25ms. Allocated memory is still 274.7MB. Free memory was 203.5MB in the beginning and 192.6MB in the end (delta: 10.9MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-12-15 22:14:16,856 INFO L158 Benchmark]: TraceAbstraction took 79733.81ms. Allocated memory is still 274.7MB. Free memory was 192.0MB in the beginning and 218.0MB in the end (delta: -26.0MB). There was no memory consumed. Max. memory is 8.0GB. [2023-12-15 22:14:16,857 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 220.2MB. Free memory is still 167.5MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 168.69ms. Allocated memory is still 274.7MB. Free memory was 218.4MB in the beginning and 206.7MB in the end (delta: 11.7MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 17.70ms. Allocated memory is still 274.7MB. Free memory was 206.7MB in the beginning and 205.2MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 18.20ms. Allocated memory is still 274.7MB. Free memory was 205.2MB in the beginning and 203.7MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 185.25ms. Allocated memory is still 274.7MB. Free memory was 203.5MB in the beginning and 192.6MB in the end (delta: 10.9MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * TraceAbstraction took 79733.81ms. Allocated memory is still 274.7MB. Free memory was 192.0MB in the beginning and 218.0MB in the end (delta: -26.0MB). There was no memory consumed. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 21]: Timeout (TraceAbstraction) Unable to prove that a call to reach_error is unreachable (line 21). Cancelled while NwaCegarLoop was analyzing trace of length 27 with TraceHistMax 5,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ATOM-1 context. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 18 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 79.7s, OverallIterations: 8, TraceHistogramMax: 5, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 70.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 6 mSolverCounterUnknown, 96 SdHoareTripleChecker+Valid, 41.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 90 mSDsluCounter, 297 SdHoareTripleChecker+Invalid, 41.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 207 mSDsCounter, 36 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 311 IncrementalHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 36 mSolverCounterUnsat, 90 mSDtfsCounter, 311 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 184 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 32.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=59occurred in iteration=7, InterpolantAutomatonStates: 52, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 7 MinimizatonAttempts, 11 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 5.8s InterpolantComputationTime, 118 NumberOfCodeBlocks, 118 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 170 ConstructedInterpolants, 6 QuantifiedInterpolants, 1126 SizeOfPredicates, 17 NumberOfNonLiveVariables, 380 ConjunctsInSsa, 101 ConjunctsInUnsatCore, 11 InterpolantComputations, 5 PerfectInterpolantSequences, 30/48 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown