/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/ps6-ll_valuebound1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-19 21:52:05,351 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-19 21:52:05,410 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-19 21:52:05,415 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-19 21:52:05,416 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-19 21:52:05,443 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-19 21:52:05,444 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-19 21:52:05,444 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-19 21:52:05,445 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-19 21:52:05,447 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-19 21:52:05,447 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-19 21:52:05,448 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-19 21:52:05,448 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-19 21:52:05,449 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-19 21:52:05,449 INFO L153 SettingsManager]: * Use SBE=true [2023-12-19 21:52:05,449 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-19 21:52:05,449 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-19 21:52:05,449 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-19 21:52:05,449 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-19 21:52:05,450 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-19 21:52:05,450 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-19 21:52:05,451 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-19 21:52:05,451 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-19 21:52:05,451 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-19 21:52:05,451 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-19 21:52:05,451 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-19 21:52:05,451 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-19 21:52:05,452 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-19 21:52:05,452 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-19 21:52:05,452 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-19 21:52:05,453 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-19 21:52:05,453 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-19 21:52:05,453 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-19 21:52:05,453 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-19 21:52:05,453 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-19 21:52:05,453 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-19 21:52:05,453 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-19 21:52:05,454 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-19 21:52:05,454 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-19 21:52:05,454 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-19 21:52:05,454 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-19 21:52:05,455 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-19 21:52:05,455 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-19 21:52:05,455 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> true [2023-12-19 21:52:05,650 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-19 21:52:05,668 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-19 21:52:05,669 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-19 21:52:05,670 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-19 21:52:05,670 INFO L274 PluginConnector]: CDTParser initialized [2023-12-19 21:52:05,671 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/ps6-ll_valuebound1.c [2023-12-19 21:52:06,632 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-19 21:52:06,807 INFO L384 CDTParser]: Found 1 translation units. [2023-12-19 21:52:06,808 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps6-ll_valuebound1.c [2023-12-19 21:52:06,813 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2c351af71/1118f6f9a78d4f1cbb58dc2fdfe9847c/FLAGc8b233655 [2023-12-19 21:52:06,824 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2c351af71/1118f6f9a78d4f1cbb58dc2fdfe9847c [2023-12-19 21:52:06,826 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-19 21:52:06,828 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-19 21:52:06,830 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-19 21:52:06,830 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-19 21:52:06,833 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-19 21:52:06,833 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.12 09:52:06" (1/1) ... [2023-12-19 21:52:06,834 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d1ae3fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 09:52:06, skipping insertion in model container [2023-12-19 21:52:06,834 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.12 09:52:06" (1/1) ... [2023-12-19 21:52:06,849 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-19 21:52:06,960 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/ps6-ll_valuebound1.c[458,471] [2023-12-19 21:52:06,977 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-19 21:52:06,988 INFO L202 MainTranslator]: Completed pre-run [2023-12-19 21:52:06,995 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/ps6-ll_valuebound1.c[458,471] [2023-12-19 21:52:07,000 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-19 21:52:07,008 INFO L206 MainTranslator]: Completed translation [2023-12-19 21:52:07,009 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 09:52:07 WrapperNode [2023-12-19 21:52:07,009 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-19 21:52:07,010 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-19 21:52:07,010 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-19 21:52:07,010 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-19 21:52:07,020 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 09:52:07" (1/1) ... [2023-12-19 21:52:07,023 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 09:52:07" (1/1) ... [2023-12-19 21:52:07,034 INFO L138 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 36 [2023-12-19 21:52:07,034 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-19 21:52:07,035 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-19 21:52:07,035 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-19 21:52:07,035 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-19 21:52:07,042 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 09:52:07" (1/1) ... [2023-12-19 21:52:07,042 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 09:52:07" (1/1) ... [2023-12-19 21:52:07,043 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 09:52:07" (1/1) ... [2023-12-19 21:52:07,050 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2023-12-19 21:52:07,050 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 09:52:07" (1/1) ... [2023-12-19 21:52:07,050 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 09:52:07" (1/1) ... [2023-12-19 21:52:07,051 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 09:52:07" (1/1) ... [2023-12-19 21:52:07,054 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 09:52:07" (1/1) ... [2023-12-19 21:52:07,055 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 09:52:07" (1/1) ... [2023-12-19 21:52:07,055 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 09:52:07" (1/1) ... [2023-12-19 21:52:07,056 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-19 21:52:07,065 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-19 21:52:07,066 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-19 21:52:07,066 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-19 21:52:07,066 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 09:52:07" (1/1) ... [2023-12-19 21:52:07,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-19 21:52:07,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 21:52:07,099 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-12-19 21:52:07,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-12-19 21:52:07,119 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-19 21:52:07,120 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-12-19 21:52:07,120 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-12-19 21:52:07,120 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-19 21:52:07,120 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-19 21:52:07,120 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-19 21:52:07,121 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-12-19 21:52:07,121 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-12-19 21:52:07,162 INFO L241 CfgBuilder]: Building ICFG [2023-12-19 21:52:07,164 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-19 21:52:07,294 INFO L282 CfgBuilder]: Performing block encoding [2023-12-19 21:52:07,324 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-19 21:52:07,324 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-12-19 21:52:07,325 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.12 09:52:07 BoogieIcfgContainer [2023-12-19 21:52:07,325 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-19 21:52:07,326 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-19 21:52:07,326 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-19 21:52:07,328 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-19 21:52:07,328 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.12 09:52:06" (1/3) ... [2023-12-19 21:52:07,329 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a8ab0f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.12 09:52:07, skipping insertion in model container [2023-12-19 21:52:07,329 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 09:52:07" (2/3) ... [2023-12-19 21:52:07,329 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a8ab0f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.12 09:52:07, skipping insertion in model container [2023-12-19 21:52:07,329 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.12 09:52:07" (3/3) ... [2023-12-19 21:52:07,330 INFO L112 eAbstractionObserver]: Analyzing ICFG ps6-ll_valuebound1.c [2023-12-19 21:52:07,345 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-19 21:52:07,345 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-19 21:52:07,384 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-19 21:52:07,389 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;@5034add2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-19 21:52:07,390 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-19 21:52:07,393 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-19 21:52:07,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-12-19 21:52:07,398 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 21:52:07,398 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 21:52:07,399 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 21:52:07,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 21:52:07,404 INFO L85 PathProgramCache]: Analyzing trace with hash -1419667615, now seen corresponding path program 1 times [2023-12-19 21:52:07,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 21:52:07,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84705974] [2023-12-19 21:52:07,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 21:52:07,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 21:52:07,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 21:52:07,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 21:52:07,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84705974] [2023-12-19 21:52:07,499 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-12-19 21:52:07,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391516798] [2023-12-19 21:52:07,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 21:52:07,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 21:52:07,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 21:52:07,501 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 21:52:07,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-19 21:52:07,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 21:52:07,556 INFO L262 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 1 conjunts are in the unsatisfiable core [2023-12-19 21:52:07,558 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 21:52:07,575 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-19 21:52:07,576 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 21:52:07,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391516798] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 21:52:07,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 21:52:07,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-19 21:52:07,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522430120] [2023-12-19 21:52:07,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 21:52:07,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-19 21:52:07,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 21:52:07,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-19 21:52:07,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-19 21:52:07,607 INFO L87 Difference]: Start difference. First operand has 21 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-19 21:52:07,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 21:52:07,631 INFO L93 Difference]: Finished difference Result 40 states and 58 transitions. [2023-12-19 21:52:07,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-19 21:52:07,634 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2023-12-19 21:52:07,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 21:52:07,638 INFO L225 Difference]: With dead ends: 40 [2023-12-19 21:52:07,638 INFO L226 Difference]: Without dead ends: 19 [2023-12-19 21:52:07,640 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-19 21:52:07,643 INFO L413 NwaCegarLoop]: 22 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, 22 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 [2023-12-19 21:52:07,644 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 21:52:07,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-12-19 21:52:07,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2023-12-19 21:52:07,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 12 states have internal predecessors, (13), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-19 21:52:07,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2023-12-19 21:52:07,670 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 17 [2023-12-19 21:52:07,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 21:52:07,671 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2023-12-19 21:52:07,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-19 21:52:07,671 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2023-12-19 21:52:07,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-12-19 21:52:07,672 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 21:52:07,673 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 21:52:07,682 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-19 21:52:07,882 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 [2023-12-19 21:52:07,883 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 21:52:07,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 21:52:07,884 INFO L85 PathProgramCache]: Analyzing trace with hash -1758174245, now seen corresponding path program 1 times [2023-12-19 21:52:07,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 21:52:07,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962681594] [2023-12-19 21:52:07,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 21:52:07,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 21:52:07,903 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 21:52:07,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1672707869] [2023-12-19 21:52:07,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 21:52:07,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 21:52:07,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 21:52:07,906 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 21:52:07,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-19 21:52:07,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 21:52:07,951 INFO L262 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 15 conjunts are in the unsatisfiable core [2023-12-19 21:52:07,953 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 21:52:08,071 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-19 21:52:08,072 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 21:52:08,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 21:52:08,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962681594] [2023-12-19 21:52:08,072 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 21:52:08,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672707869] [2023-12-19 21:52:08,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672707869] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 21:52:08,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 21:52:08,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-19 21:52:08,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719585328] [2023-12-19 21:52:08,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 21:52:08,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-19 21:52:08,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 21:52:08,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-19 21:52:08,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-19 21:52:08,076 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-19 21:52:08,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 21:52:08,178 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2023-12-19 21:52:08,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-19 21:52:08,178 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2023-12-19 21:52:08,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 21:52:08,179 INFO L225 Difference]: With dead ends: 30 [2023-12-19 21:52:08,179 INFO L226 Difference]: Without dead ends: 26 [2023-12-19 21:52:08,180 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-12-19 21:52:08,180 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 8 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-19 21:52:08,181 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 68 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-19 21:52:08,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-12-19 21:52:08,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2023-12-19 21:52:08,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 16 states have (on average 1.125) internal successors, (18), 17 states have internal predecessors, (18), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-19 21:52:08,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2023-12-19 21:52:08,186 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 17 [2023-12-19 21:52:08,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 21:52:08,186 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2023-12-19 21:52:08,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-19 21:52:08,186 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2023-12-19 21:52:08,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-12-19 21:52:08,187 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 21:52:08,187 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 21:52:08,193 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-19 21:52:08,391 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 [2023-12-19 21:52:08,392 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 21:52:08,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 21:52:08,392 INFO L85 PathProgramCache]: Analyzing trace with hash -795669560, now seen corresponding path program 1 times [2023-12-19 21:52:08,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 21:52:08,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403464263] [2023-12-19 21:52:08,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 21:52:08,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 21:52:08,401 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 21:52:08,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [344057469] [2023-12-19 21:52:08,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 21:52:08,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 21:52:08,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 21:52:08,403 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 21:52:08,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-19 21:52:08,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 21:52:08,434 INFO L262 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-19 21:52:08,436 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 21:52:08,480 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-19 21:52:08,480 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 21:52:08,728 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-19 21:52:08,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 21:52:08,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403464263] [2023-12-19 21:52:08,728 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 21:52:08,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344057469] [2023-12-19 21:52:08,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344057469] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-19 21:52:08,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-19 21:52:08,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2023-12-19 21:52:08,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501765256] [2023-12-19 21:52:08,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 21:52:08,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-19 21:52:08,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 21:52:08,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-19 21:52:08,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-12-19 21:52:08,730 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-19 21:52:08,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 21:52:08,770 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2023-12-19 21:52:08,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-19 21:52:08,770 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2023-12-19 21:52:08,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 21:52:08,772 INFO L225 Difference]: With dead ends: 32 [2023-12-19 21:52:08,772 INFO L226 Difference]: Without dead ends: 28 [2023-12-19 21:52:08,772 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-12-19 21:52:08,773 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 7 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 21:52:08,773 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 57 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 21:52:08,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-12-19 21:52:08,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2023-12-19 21:52:08,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 18 states have internal predecessors, (19), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-19 21:52:08,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2023-12-19 21:52:08,780 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 24 [2023-12-19 21:52:08,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 21:52:08,781 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2023-12-19 21:52:08,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-19 21:52:08,781 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2023-12-19 21:52:08,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-12-19 21:52:08,782 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 21:52:08,782 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 21:52:08,794 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-19 21:52:08,984 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 [2023-12-19 21:52:08,985 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 21:52:08,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 21:52:08,985 INFO L85 PathProgramCache]: Analyzing trace with hash 1266135666, now seen corresponding path program 1 times [2023-12-19 21:52:08,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 21:52:08,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579473860] [2023-12-19 21:52:08,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 21:52:08,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 21:52:08,993 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 21:52:08,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [85398347] [2023-12-19 21:52:08,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 21:52:08,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 21:52:08,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 21:52:08,997 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 21:52:09,002 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-19 21:52:09,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 21:52:09,044 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 24 conjunts are in the unsatisfiable core [2023-12-19 21:52:09,047 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 21:52:09,164 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-19 21:52:09,164 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 21:52:09,401 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-19 21:52:09,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 21:52:09,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579473860] [2023-12-19 21:52:09,401 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 21:52:09,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85398347] [2023-12-19 21:52:09,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85398347] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 21:52:09,402 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 21:52:09,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2023-12-19 21:52:09,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022130772] [2023-12-19 21:52:09,402 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 21:52:09,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-12-19 21:52:09,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 21:52:09,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-12-19 21:52:09,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2023-12-19 21:52:09,405 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 16 states, 12 states have (on average 2.25) internal successors, (27), 13 states have internal predecessors, (27), 9 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2023-12-19 21:52:09,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 21:52:09,834 INFO L93 Difference]: Finished difference Result 51 states and 60 transitions. [2023-12-19 21:52:09,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-19 21:52:09,834 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 12 states have (on average 2.25) internal successors, (27), 13 states have internal predecessors, (27), 9 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 35 [2023-12-19 21:52:09,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 21:52:09,835 INFO L225 Difference]: With dead ends: 51 [2023-12-19 21:52:09,835 INFO L226 Difference]: Without dead ends: 41 [2023-12-19 21:52:09,835 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2023-12-19 21:52:09,836 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 17 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-19 21:52:09,836 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 136 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-19 21:52:09,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-12-19 21:52:09,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2023-12-19 21:52:09,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 27 states have (on average 1.037037037037037) internal successors, (28), 27 states have internal predecessors, (28), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-12-19 21:52:09,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2023-12-19 21:52:09,845 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 35 [2023-12-19 21:52:09,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 21:52:09,846 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2023-12-19 21:52:09,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 12 states have (on average 2.25) internal successors, (27), 13 states have internal predecessors, (27), 9 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2023-12-19 21:52:09,846 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2023-12-19 21:52:09,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-12-19 21:52:09,847 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 21:52:09,847 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 21:52:09,854 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-19 21:52:10,052 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 [2023-12-19 21:52:10,052 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 21:52:10,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 21:52:10,052 INFO L85 PathProgramCache]: Analyzing trace with hash 459274687, now seen corresponding path program 2 times [2023-12-19 21:52:10,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 21:52:10,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125412367] [2023-12-19 21:52:10,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 21:52:10,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 21:52:10,066 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 21:52:10,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1159053146] [2023-12-19 21:52:10,066 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-19 21:52:10,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 21:52:10,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 21:52:10,075 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 21:52:10,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-19 21:52:10,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-19 21:52:10,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 21:52:10,126 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-19 21:52:10,130 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 21:52:10,254 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 70 proven. 3 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-12-19 21:52:10,254 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 21:52:10,368 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 42 proven. 3 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2023-12-19 21:52:10,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 21:52:10,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125412367] [2023-12-19 21:52:10,369 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 21:52:10,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159053146] [2023-12-19 21:52:10,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159053146] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 21:52:10,369 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 21:52:10,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2023-12-19 21:52:10,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401598259] [2023-12-19 21:52:10,369 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 21:52:10,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-12-19 21:52:10,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 21:52:10,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-12-19 21:52:10,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2023-12-19 21:52:10,371 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 13 states have internal predecessors, (37), 12 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (16), 11 states have call predecessors, (16), 12 states have call successors, (16) [2023-12-19 21:52:10,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 21:52:10,413 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2023-12-19 21:52:10,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-19 21:52:10,413 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 13 states have internal predecessors, (37), 12 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (16), 11 states have call predecessors, (16), 12 states have call successors, (16) Word has length 56 [2023-12-19 21:52:10,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 21:52:10,413 INFO L225 Difference]: With dead ends: 43 [2023-12-19 21:52:10,414 INFO L226 Difference]: Without dead ends: 0 [2023-12-19 21:52:10,414 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2023-12-19 21:52:10,414 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 3 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 21:52:10,415 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 86 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 21:52:10,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-12-19 21:52:10,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-12-19 21:52:10,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 21:52:10,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-12-19 21:52:10,416 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 56 [2023-12-19 21:52:10,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 21:52:10,416 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-12-19 21:52:10,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 13 states have internal predecessors, (37), 12 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (16), 11 states have call predecessors, (16), 12 states have call successors, (16) [2023-12-19 21:52:10,416 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-12-19 21:52:10,416 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-12-19 21:52:10,418 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-19 21:52:10,425 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-12-19 21:52:10,622 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 [2023-12-19 21:52:10,624 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2023-12-19 21:52:11,565 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2023-12-19 21:52:11,566 INFO L895 garLoopResultBuilder]: At program point L29(line 29) the Hoare annotation is: (or (and (= |ULTIMATE.start_main_~k~0#1| 1) (= |ULTIMATE.start_main_~c~0#1| 1) (= |ULTIMATE.start_main_~x~0#1| 1) (= |ULTIMATE.start_main_~y~0#1| 1)) (and (<= 0 |ULTIMATE.start_main_~k~0#1|) (= |ULTIMATE.start_main_~c~0#1| 0) (<= |ULTIMATE.start_main_~k~0#1| 1) (= |ULTIMATE.start_main_~y~0#1| 0) (= |ULTIMATE.start_main_~x~0#1| 0))) [2023-12-19 21:52:11,566 INFO L899 garLoopResultBuilder]: For program point L29-1(lines 28 37) no Hoare annotation was computed. [2023-12-19 21:52:11,566 INFO L902 garLoopResultBuilder]: At program point L21(line 21) the Hoare annotation is: true [2023-12-19 21:52:11,566 INFO L895 garLoopResultBuilder]: At program point L21-1(line 21) the Hoare annotation is: (and (<= 0 |ULTIMATE.start_main_~k~0#1|) (<= |ULTIMATE.start_main_~k~0#1| 1)) [2023-12-19 21:52:11,566 INFO L899 garLoopResultBuilder]: For program point $Ultimate##0(line -1) no Hoare annotation was computed. [2023-12-19 21:52:11,566 INFO L899 garLoopResultBuilder]: For program point L40(line 40) no Hoare annotation was computed. [2023-12-19 21:52:11,567 INFO L895 garLoopResultBuilder]: At program point L28-2(lines 28 37) the Hoare annotation is: (or (and (= |ULTIMATE.start_main_~k~0#1| 1) (= |ULTIMATE.start_main_~c~0#1| 1) (= |ULTIMATE.start_main_~x~0#1| 1) (= |ULTIMATE.start_main_~y~0#1| 1)) (and (<= 0 |ULTIMATE.start_main_~k~0#1|) (= |ULTIMATE.start_main_~c~0#1| 0) (<= |ULTIMATE.start_main_~k~0#1| 1) (= |ULTIMATE.start_main_~y~0#1| 0) (= |ULTIMATE.start_main_~x~0#1| 0))) [2023-12-19 21:52:11,567 INFO L895 garLoopResultBuilder]: At program point L28-3(lines 28 37) the Hoare annotation is: (let ((.cse0 (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|))) (and (= (* |ULTIMATE.start_main_~k~0#1| |ULTIMATE.start_main_~y~0#1|) .cse0) (= (+ (* 6 (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|)) (* 2 (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|)) (* 5 (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|))) (+ (* |ULTIMATE.start_main_~x~0#1| 12) .cse0)))) [2023-12-19 21:52:11,567 INFO L899 garLoopResultBuilder]: For program point L22(line 22) no Hoare annotation was computed. [2023-12-19 21:52:11,568 INFO L895 garLoopResultBuilder]: At program point L39(line 39) the Hoare annotation is: (let ((.cse0 (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|))) (and (= (* |ULTIMATE.start_main_~k~0#1| |ULTIMATE.start_main_~y~0#1|) .cse0) (= (+ (* 6 (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|)) (* 2 (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|)) (* 5 (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|))) (+ (* |ULTIMATE.start_main_~x~0#1| 12) .cse0)))) [2023-12-19 21:52:11,568 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 6 8) the Hoare annotation is: true [2023-12-19 21:52:11,568 INFO L899 garLoopResultBuilder]: For program point L7(line 7) no Hoare annotation was computed. [2023-12-19 21:52:11,568 INFO L899 garLoopResultBuilder]: For program point L7-2(lines 6 8) no Hoare annotation was computed. [2023-12-19 21:52:11,568 INFO L899 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 6 8) no Hoare annotation was computed. [2023-12-19 21:52:11,568 INFO L899 garLoopResultBuilder]: For program point L11(lines 11 12) no Hoare annotation was computed. [2023-12-19 21:52:11,568 INFO L899 garLoopResultBuilder]: For program point L10(lines 10 13) no Hoare annotation was computed. [2023-12-19 21:52:11,568 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 9 15) no Hoare annotation was computed. [2023-12-19 21:52:11,568 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 9 15) the Hoare annotation is: true [2023-12-19 21:52:11,568 INFO L899 garLoopResultBuilder]: For program point L10-2(lines 9 15) no Hoare annotation was computed. [2023-12-19 21:52:11,568 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2023-12-19 21:52:11,570 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1] [2023-12-19 21:52:11,571 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-19 21:52:11,578 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.12 09:52:11 BoogieIcfgContainer [2023-12-19 21:52:11,578 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-19 21:52:11,578 INFO L158 Benchmark]: Toolchain (without parser) took 4750.51ms. Allocated memory was 220.2MB in the beginning and 313.5MB in the end (delta: 93.3MB). Free memory was 179.2MB in the beginning and 255.9MB in the end (delta: -76.6MB). Peak memory consumption was 17.1MB. Max. memory is 8.0GB. [2023-12-19 21:52:11,578 INFO L158 Benchmark]: CDTParser took 0.43ms. Allocated memory is still 220.2MB. Free memory is still 172.0MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-19 21:52:11,579 INFO L158 Benchmark]: CACSL2BoogieTranslator took 179.21ms. Allocated memory is still 220.2MB. Free memory was 178.8MB in the beginning and 167.5MB in the end (delta: 11.3MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-12-19 21:52:11,579 INFO L158 Benchmark]: Boogie Procedure Inliner took 24.92ms. Allocated memory is still 220.2MB. Free memory was 167.5MB in the beginning and 166.0MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-12-19 21:52:11,579 INFO L158 Benchmark]: Boogie Preprocessor took 21.46ms. Allocated memory is still 220.2MB. Free memory was 166.0MB in the beginning and 164.5MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-19 21:52:11,579 INFO L158 Benchmark]: RCFGBuilder took 259.32ms. Allocated memory is still 220.2MB. Free memory was 164.1MB in the beginning and 153.4MB in the end (delta: 10.7MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2023-12-19 21:52:11,579 INFO L158 Benchmark]: TraceAbstraction took 4251.81ms. Allocated memory was 220.2MB in the beginning and 313.5MB in the end (delta: 93.3MB). Free memory was 152.6MB in the beginning and 255.9MB in the end (delta: -103.3MB). There was no memory consumed. Max. memory is 8.0GB. [2023-12-19 21:52:11,580 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.43ms. Allocated memory is still 220.2MB. Free memory is still 172.0MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 179.21ms. Allocated memory is still 220.2MB. Free memory was 178.8MB in the beginning and 167.5MB in the end (delta: 11.3MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 24.92ms. Allocated memory is still 220.2MB. Free memory was 167.5MB in the beginning and 166.0MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 21.46ms. Allocated memory is still 220.2MB. Free memory was 166.0MB in the beginning and 164.5MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 259.32ms. Allocated memory is still 220.2MB. Free memory was 164.1MB in the beginning and 153.4MB in the end (delta: 10.7MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * TraceAbstraction took 4251.81ms. Allocated memory was 220.2MB in the beginning and 313.5MB in the end (delta: 93.3MB). Free memory was 152.6MB in the beginning and 255.9MB in the end (delta: -103.3MB). 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 - PositiveResult [Line: 12]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 21 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 4.2s, OverallIterations: 5, TraceHistogramMax: 7, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.9s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 38 SdHoareTripleChecker+Valid, 0.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 35 mSDsluCounter, 369 SdHoareTripleChecker+Invalid, 0.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 288 mSDsCounter, 17 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 243 IncrementalHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 17 mSolverCounterUnsat, 81 mSDtfsCounter, 243 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 267 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=41occurred in iteration=4, InterpolantAutomatonStates: 38, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 27 PreInvPairs, 40 NumberOfFragments, 152 HoareAnnotationTreeSize, 27 FormulaSimplifications, 377 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FormulaSimplificationsInter, 146 FormulaSimplificationTreeSizeReductionInter, 0.9s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.1s InterpolantComputationTime, 166 NumberOfCodeBlocks, 166 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 256 ConstructedInterpolants, 0 QuantifiedInterpolants, 1090 SizeOfPredicates, 10 NumberOfNonLiveVariables, 425 ConjunctsInSsa, 64 ConjunctsInUnsatCore, 8 InterpolantComputations, 3 PerfectInterpolantSequences, 270/286 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 28]: Loop Invariant Derived loop invariant: (((((k == 1) && (c == 1)) && (x == 1)) && (y == 1)) || (((((0 <= k) && (c == 0)) && (k <= 1)) && (y == 0)) && (x == 0))) RESULT: Ultimate proved your program to be correct! [2023-12-19 21:52:11,594 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...