/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.use.bitabs.translation false -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/nla-digbench-scaling/geo1-ll_unwindbound1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-21 06:47:05,300 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-21 06:47:05,336 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-21 06:47:05,339 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-21 06:47:05,339 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-21 06:47:05,352 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-21 06:47:05,353 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-21 06:47:05,353 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-21 06:47:05,353 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-21 06:47:05,354 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-21 06:47:05,354 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-21 06:47:05,354 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-21 06:47:05,354 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-21 06:47:05,355 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-21 06:47:05,355 INFO L153 SettingsManager]: * Use SBE=true [2023-12-21 06:47:05,355 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-21 06:47:05,355 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-21 06:47:05,356 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-21 06:47:05,356 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-21 06:47:05,356 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-21 06:47:05,356 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-21 06:47:05,357 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-21 06:47:05,357 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-21 06:47:05,357 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-21 06:47:05,358 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-21 06:47:05,358 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-21 06:47:05,358 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-21 06:47:05,358 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-21 06:47:05,359 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-21 06:47:05,359 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-21 06:47:05,359 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-21 06:47:05,359 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-21 06:47:05,359 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-21 06:47:05,360 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-21 06:47:05,360 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-21 06:47:05,360 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-21 06:47:05,360 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-21 06:47:05,361 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-21 06:47:05,361 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-21 06:47:05,361 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-21 06:47:05,361 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-21 06:47:05,362 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-21 06:47:05,362 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-21 06:47:05,362 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> false [2023-12-21 06:47:05,544 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-21 06:47:05,557 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-21 06:47:05,559 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-21 06:47:05,560 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-21 06:47:05,560 INFO L274 PluginConnector]: CDTParser initialized [2023-12-21 06:47:05,561 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/geo1-ll_unwindbound1.c [2023-12-21 06:47:06,610 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-21 06:47:06,787 INFO L384 CDTParser]: Found 1 translation units. [2023-12-21 06:47:06,788 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/geo1-ll_unwindbound1.c [2023-12-21 06:47:06,794 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3bddca444/7844c0b348354e899f07d77ef0243fb5/FLAG814baac80 [2023-12-21 06:47:06,808 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3bddca444/7844c0b348354e899f07d77ef0243fb5 [2023-12-21 06:47:06,812 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-21 06:47:06,813 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-21 06:47:06,815 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-21 06:47:06,815 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-21 06:47:06,818 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-21 06:47:06,819 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 06:47:06" (1/1) ... [2023-12-21 06:47:06,819 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5321ca47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:47:06, skipping insertion in model container [2023-12-21 06:47:06,820 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 06:47:06" (1/1) ... [2023-12-21 06:47:06,837 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-21 06:47:06,969 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/geo1-ll_unwindbound1.c[546,559] [2023-12-21 06:47:06,979 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-21 06:47:06,987 INFO L202 MainTranslator]: Completed pre-run [2023-12-21 06:47:06,995 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/geo1-ll_unwindbound1.c[546,559] [2023-12-21 06:47:06,998 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-21 06:47:07,008 INFO L206 MainTranslator]: Completed translation [2023-12-21 06:47:07,008 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:47:07 WrapperNode [2023-12-21 06:47:07,008 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-21 06:47:07,009 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-21 06:47:07,009 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-21 06:47:07,009 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-21 06:47:07,014 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:47:07" (1/1) ... [2023-12-21 06:47:07,019 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:47:07" (1/1) ... [2023-12-21 06:47:07,031 INFO L138 Inliner]: procedures = 14, calls = 11, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 46 [2023-12-21 06:47:07,031 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-21 06:47:07,031 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-21 06:47:07,031 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-21 06:47:07,032 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-21 06:47:07,039 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:47:07" (1/1) ... [2023-12-21 06:47:07,039 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:47:07" (1/1) ... [2023-12-21 06:47:07,041 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:47:07" (1/1) ... [2023-12-21 06:47:07,048 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]. [2023-12-21 06:47:07,048 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:47:07" (1/1) ... [2023-12-21 06:47:07,048 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:47:07" (1/1) ... [2023-12-21 06:47:07,050 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:47:07" (1/1) ... [2023-12-21 06:47:07,052 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:47:07" (1/1) ... [2023-12-21 06:47:07,053 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:47:07" (1/1) ... [2023-12-21 06:47:07,054 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:47:07" (1/1) ... [2023-12-21 06:47:07,054 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-21 06:47:07,055 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-21 06:47:07,055 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-21 06:47:07,055 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-21 06:47:07,056 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:47:07" (1/1) ... [2023-12-21 06:47:07,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-21 06:47:07,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 06:47:07,094 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-12-21 06:47:07,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-12-21 06:47:07,118 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-21 06:47:07,118 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-12-21 06:47:07,118 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-12-21 06:47:07,118 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-21 06:47:07,118 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-21 06:47:07,118 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-21 06:47:07,119 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-12-21 06:47:07,119 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-12-21 06:47:07,159 INFO L241 CfgBuilder]: Building ICFG [2023-12-21 06:47:07,160 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-21 06:47:07,253 INFO L282 CfgBuilder]: Performing block encoding [2023-12-21 06:47:07,268 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-21 06:47:07,268 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-12-21 06:47:07,269 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 06:47:07 BoogieIcfgContainer [2023-12-21 06:47:07,269 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-21 06:47:07,270 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-21 06:47:07,270 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-21 06:47:07,272 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-21 06:47:07,273 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 06:47:06" (1/3) ... [2023-12-21 06:47:07,273 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@480478ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 06:47:07, skipping insertion in model container [2023-12-21 06:47:07,273 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:47:07" (2/3) ... [2023-12-21 06:47:07,273 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@480478ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 06:47:07, skipping insertion in model container [2023-12-21 06:47:07,273 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 06:47:07" (3/3) ... [2023-12-21 06:47:07,274 INFO L112 eAbstractionObserver]: Analyzing ICFG geo1-ll_unwindbound1.c [2023-12-21 06:47:07,286 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-21 06:47:07,287 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-21 06:47:07,317 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-21 06:47:07,321 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;@6f1fdc80, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-21 06:47:07,322 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-21 06:47:07,324 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-21 06:47:07,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-12-21 06:47:07,329 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 06:47:07,330 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 06:47:07,330 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 06:47:07,334 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 06:47:07,334 INFO L85 PathProgramCache]: Analyzing trace with hash -439153478, now seen corresponding path program 1 times [2023-12-21 06:47:07,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 06:47:07,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715274594] [2023-12-21 06:47:07,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 06:47:07,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 06:47:07,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 06:47:07,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 06:47:07,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715274594] [2023-12-21 06:47:07,436 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-12-21 06:47:07,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405847385] [2023-12-21 06:47:07,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 06:47:07,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 06:47:07,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 06:47:07,476 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 06:47:07,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-21 06:47:07,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 06:47:07,555 INFO L262 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 1 conjunts are in the unsatisfiable core [2023-12-21 06:47:07,558 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 06:47:07,579 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-21 06:47:07,579 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-21 06:47:07,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405847385] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 06:47:07,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 06:47:07,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-21 06:47:07,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167160620] [2023-12-21 06:47:07,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 06:47:07,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-21 06:47:07,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 06:47:07,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-21 06:47:07,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-21 06:47:07,616 INFO L87 Difference]: Start difference. First operand has 22 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 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) [2023-12-21 06:47:07,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 06:47:07,646 INFO L93 Difference]: Finished difference Result 42 states and 57 transitions. [2023-12-21 06:47:07,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-21 06:47:07,653 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 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 18 [2023-12-21 06:47:07,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 06:47:07,658 INFO L225 Difference]: With dead ends: 42 [2023-12-21 06:47:07,658 INFO L226 Difference]: Without dead ends: 20 [2023-12-21 06:47:07,661 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-21 06:47:07,664 INFO L413 NwaCegarLoop]: 23 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, 23 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 [2023-12-21 06:47:07,666 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 06:47:07,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-12-21 06:47:07,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2023-12-21 06:47:07,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 14 states have internal predecessors, (16), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-21 06:47:07,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2023-12-21 06:47:07,693 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 18 [2023-12-21 06:47:07,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 06:47:07,693 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2023-12-21 06:47:07,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 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) [2023-12-21 06:47:07,694 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2023-12-21 06:47:07,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-12-21 06:47:07,695 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 06:47:07,695 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 06:47:07,703 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-21 06:47:07,900 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 [2023-12-21 06:47:07,901 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 06:47:07,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 06:47:07,902 INFO L85 PathProgramCache]: Analyzing trace with hash 1801449375, now seen corresponding path program 1 times [2023-12-21 06:47:07,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 06:47:07,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479173693] [2023-12-21 06:47:07,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 06:47:07,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 06:47:07,929 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 06:47:07,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1864003536] [2023-12-21 06:47:07,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 06:47:07,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 06:47:07,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 06:47:07,935 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 06:47:07,942 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-21 06:47:07,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 06:47:07,978 INFO L262 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2023-12-21 06:47:07,981 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 06:47:08,074 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-21 06:47:08,075 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 06:47:08,143 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-21 06:47:08,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 06:47:08,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479173693] [2023-12-21 06:47:08,144 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 06:47:08,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864003536] [2023-12-21 06:47:08,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864003536] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-21 06:47:08,144 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-21 06:47:08,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2023-12-21 06:47:08,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523264633] [2023-12-21 06:47:08,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 06:47:08,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-21 06:47:08,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 06:47:08,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-21 06:47:08,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-12-21 06:47:08,146 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-21 06:47:12,209 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 [] [2023-12-21 06:47:12,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 06:47:12,263 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2023-12-21 06:47:12,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-21 06:47:12,264 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2023-12-21 06:47:12,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 06:47:12,265 INFO L225 Difference]: With dead ends: 31 [2023-12-21 06:47:12,265 INFO L226 Difference]: Without dead ends: 29 [2023-12-21 06:47:12,265 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2023-12-21 06:47:12,266 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 8 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2023-12-21 06:47:12,266 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 65 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 1 Unknown, 0 Unchecked, 4.1s Time] [2023-12-21 06:47:12,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-12-21 06:47:12,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2023-12-21 06:47:12,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 20 states have internal predecessors, (22), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-21 06:47:12,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2023-12-21 06:47:12,273 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 18 [2023-12-21 06:47:12,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 06:47:12,274 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2023-12-21 06:47:12,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-21 06:47:12,274 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2023-12-21 06:47:12,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-12-21 06:47:12,274 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 06:47:12,275 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 06:47:12,279 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-21 06:47:12,479 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 [2023-12-21 06:47:12,480 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 06:47:12,480 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 06:47:12,480 INFO L85 PathProgramCache]: Analyzing trace with hash -73181088, now seen corresponding path program 1 times [2023-12-21 06:47:12,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 06:47:12,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140751205] [2023-12-21 06:47:12,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 06:47:12,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 06:47:12,498 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 06:47:12,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [249845642] [2023-12-21 06:47:12,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 06:47:12,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 06:47:12,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 06:47:12,501 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 06:47:12,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-21 06:47:12,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 06:47:12,568 INFO L262 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-21 06:47:12,569 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 06:47:12,594 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-21 06:47:12,594 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-21 06:47:12,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 06:47:12,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140751205] [2023-12-21 06:47:12,594 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 06:47:12,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249845642] [2023-12-21 06:47:12,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249845642] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 06:47:12,595 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 06:47:12,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-21 06:47:12,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114706783] [2023-12-21 06:47:12,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 06:47:12,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-21 06:47:12,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 06:47:12,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-21 06:47:12,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-21 06:47:12,596 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 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), 1 states have call successors, (2) [2023-12-21 06:47:12,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 06:47:12,607 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2023-12-21 06:47:12,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-21 06:47:12,608 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 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), 1 states have call successors, (2) Word has length 19 [2023-12-21 06:47:12,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 06:47:12,609 INFO L225 Difference]: With dead ends: 35 [2023-12-21 06:47:12,609 INFO L226 Difference]: Without dead ends: 27 [2023-12-21 06:47:12,609 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-21 06:47:12,610 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 06:47:12,610 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 51 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 06:47:12,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-12-21 06:47:12,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2023-12-21 06:47:12,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 20 states have internal predecessors, (21), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-21 06:47:12,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2023-12-21 06:47:12,615 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 19 [2023-12-21 06:47:12,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 06:47:12,616 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2023-12-21 06:47:12,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 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), 1 states have call successors, (2) [2023-12-21 06:47:12,616 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2023-12-21 06:47:12,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-12-21 06:47:12,616 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 06:47:12,616 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 06:47:12,633 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-21 06:47:12,823 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 [2023-12-21 06:47:12,823 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 06:47:12,824 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 06:47:12,824 INFO L85 PathProgramCache]: Analyzing trace with hash 93929903, now seen corresponding path program 1 times [2023-12-21 06:47:12,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 06:47:12,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504286953] [2023-12-21 06:47:12,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 06:47:12,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 06:47:12,850 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 06:47:12,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1861139338] [2023-12-21 06:47:12,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 06:47:12,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 06:47:12,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 06:47:12,857 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 06:47:12,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-21 06:47:12,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 06:47:12,897 INFO L262 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 13 conjunts are in the unsatisfiable core [2023-12-21 06:47:12,899 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 06:47:13,117 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-21 06:47:13,117 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 06:47:13,224 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-21 06:47:13,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 06:47:13,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504286953] [2023-12-21 06:47:13,224 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 06:47:13,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861139338] [2023-12-21 06:47:13,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861139338] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 06:47:13,224 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 06:47:13,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2023-12-21 06:47:13,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430417518] [2023-12-21 06:47:13,225 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 06:47:13,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-21 06:47:13,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 06:47:13,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-21 06:47:13,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-12-21 06:47:13,226 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 10 states have internal predecessors, (20), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-21 06:47:17,360 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 [] [2023-12-21 06:47:17,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 06:47:17,483 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2023-12-21 06:47:17,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-21 06:47:17,483 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 10 states have internal predecessors, (20), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 25 [2023-12-21 06:47:17,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 06:47:17,484 INFO L225 Difference]: With dead ends: 35 [2023-12-21 06:47:17,484 INFO L226 Difference]: Without dead ends: 27 [2023-12-21 06:47:17,484 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2023-12-21 06:47:17,485 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 14 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2023-12-21 06:47:17,485 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 127 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 62 Invalid, 1 Unknown, 0 Unchecked, 4.2s Time] [2023-12-21 06:47:17,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-12-21 06:47:17,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2023-12-21 06:47:17,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 20 states have internal predecessors, (20), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-21 06:47:17,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2023-12-21 06:47:17,489 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 25 [2023-12-21 06:47:17,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 06:47:17,489 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2023-12-21 06:47:17,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 10 states have internal predecessors, (20), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-21 06:47:17,489 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2023-12-21 06:47:17,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-12-21 06:47:17,490 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 06:47:17,490 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 06:47:17,512 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-21 06:47:17,695 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 [2023-12-21 06:47:17,695 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 06:47:17,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 06:47:17,695 INFO L85 PathProgramCache]: Analyzing trace with hash -74990603, now seen corresponding path program 1 times [2023-12-21 06:47:17,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 06:47:17,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921193924] [2023-12-21 06:47:17,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 06:47:17,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 06:47:17,716 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 06:47:17,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1934243391] [2023-12-21 06:47:17,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 06:47:17,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 06:47:17,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 06:47:17,718 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 06:47:17,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-21 06:47:17,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 06:47:17,753 INFO L262 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-21 06:47:17,754 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 06:47:17,783 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-21 06:47:17,784 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 06:47:17,805 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-21 06:47:17,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 06:47:17,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921193924] [2023-12-21 06:47:17,805 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 06:47:17,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934243391] [2023-12-21 06:47:17,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934243391] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 06:47:17,805 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 06:47:17,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 5 [2023-12-21 06:47:17,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180784147] [2023-12-21 06:47:17,806 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 06:47:17,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-21 06:47:17,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 06:47:17,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-21 06:47:17,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-21 06:47:17,807 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 3 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-21 06:47:17,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 06:47:17,824 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2023-12-21 06:47:17,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-21 06:47:17,825 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 3 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 26 [2023-12-21 06:47:17,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 06:47:17,825 INFO L225 Difference]: With dead ends: 38 [2023-12-21 06:47:17,825 INFO L226 Difference]: Without dead ends: 24 [2023-12-21 06:47:17,826 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-12-21 06:47:17,826 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 9 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 06:47:17,826 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 41 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 06:47:17,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-12-21 06:47:17,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-12-21 06:47:17,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 17 states have (on average 1.0) internal successors, (17), 17 states have internal predecessors, (17), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-21 06:47:17,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2023-12-21 06:47:17,830 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 26 [2023-12-21 06:47:17,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 06:47:17,830 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2023-12-21 06:47:17,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 3 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-21 06:47:17,830 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2023-12-21 06:47:17,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-12-21 06:47:17,831 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 06:47:17,831 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 06:47:17,852 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-21 06:47:18,053 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 [2023-12-21 06:47:18,054 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 06:47:18,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 06:47:18,054 INFO L85 PathProgramCache]: Analyzing trace with hash 1886721738, now seen corresponding path program 1 times [2023-12-21 06:47:18,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 06:47:18,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068506661] [2023-12-21 06:47:18,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 06:47:18,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 06:47:18,062 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 06:47:18,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1519311801] [2023-12-21 06:47:18,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 06:47:18,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 06:47:18,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 06:47:18,093 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 06:47:18,117 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-21 06:47:18,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 06:47:18,169 INFO L262 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 21 conjunts are in the unsatisfiable core [2023-12-21 06:47:18,170 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 06:47:18,252 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-21 06:47:18,253 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 06:47:34,463 WARN L876 $PredicateComparison]: unable to prove that (or (= (mod (+ (* 18446744073709551615 |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~z~0#1|) (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~z~0#1| |c_ULTIMATE.start_main_~z~0#1|) |c_ULTIMATE.start_main_~z~0#1| (* |c_ULTIMATE.start_main_~y~0#1| 18446744073709551615 |c_ULTIMATE.start_main_~z~0#1|)) 18446744073709551616) 0) (not (= (mod (+ (* 18446744073709551615 |c_ULTIMATE.start_main_~x~0#1|) (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~z~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| 18446744073709551615) 1) 18446744073709551616) 0))) is different from true [2023-12-21 06:47:50,658 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 2 not checked. [2023-12-21 06:47:50,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 06:47:50,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068506661] [2023-12-21 06:47:50,658 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 06:47:50,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519311801] [2023-12-21 06:47:50,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519311801] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 06:47:50,658 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 06:47:50,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2023-12-21 06:47:50,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183954314] [2023-12-21 06:47:50,659 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 06:47:50,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-12-21 06:47:50,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 06:47:50,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-12-21 06:47:50,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=147, Unknown=2, NotChecked=24, Total=210 [2023-12-21 06:47:50,660 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand has 15 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 5 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-12-21 06:47:51,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 06:47:51,465 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2023-12-21 06:47:51,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-21 06:47:51,466 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 5 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 27 [2023-12-21 06:47:51,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 06:47:51,466 INFO L225 Difference]: With dead ends: 24 [2023-12-21 06:47:51,466 INFO L226 Difference]: Without dead ends: 0 [2023-12-21 06:47:51,466 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=45, Invalid=167, Unknown=2, NotChecked=26, Total=240 [2023-12-21 06:47:51,467 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 8 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 18 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-21 06:47:51,467 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 113 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 45 Invalid, 0 Unknown, 18 Unchecked, 0.8s Time] [2023-12-21 06:47:51,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-12-21 06:47:51,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-12-21 06:47:51,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 06:47:51,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-12-21 06:47:51,468 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 27 [2023-12-21 06:47:51,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 06:47:51,468 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-12-21 06:47:51,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 5 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-12-21 06:47:51,468 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-12-21 06:47:51,468 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-12-21 06:47:51,471 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-21 06:47:51,492 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-12-21 06:47:51,677 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 [2023-12-21 06:47:51,680 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2023-12-21 06:47:51,739 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2023-12-21 06:47:51,739 INFO L895 garLoopResultBuilder]: At program point L35-3(lines 35 45) the Hoare annotation is: (or (and (= |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~z~0#1|) (= |ULTIMATE.start_main_~x~0#1| 1) (= ~counter~0 0)) (and (= |ULTIMATE.start_main_~y~0#1| (* |ULTIMATE.start_main_~z~0#1| |ULTIMATE.start_main_~z~0#1|)) (<= 1 ~counter~0) (= |ULTIMATE.start_main_~x~0#1| (+ |ULTIMATE.start_main_~z~0#1| 1)))) [2023-12-21 06:47:51,739 INFO L899 garLoopResultBuilder]: For program point L35-4(lines 35 45) no Hoare annotation was computed. [2023-12-21 06:47:51,739 INFO L899 garLoopResultBuilder]: For program point L29(line 29) no Hoare annotation was computed. [2023-12-21 06:47:51,739 INFO L899 garLoopResultBuilder]: For program point $Ultimate##0(line -1) no Hoare annotation was computed. [2023-12-21 06:47:51,739 INFO L895 garLoopResultBuilder]: At program point L36(line 36) the Hoare annotation is: (and (= |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~z~0#1|) (= |ULTIMATE.start_main_~x~0#1| 1) (<= 1 ~counter~0)) [2023-12-21 06:47:51,739 INFO L899 garLoopResultBuilder]: For program point L36-1(lines 35 45) no Hoare annotation was computed. [2023-12-21 06:47:51,740 INFO L895 garLoopResultBuilder]: At program point L28(line 28) the Hoare annotation is: (= ~counter~0 0) [2023-12-21 06:47:51,740 INFO L895 garLoopResultBuilder]: At program point L28-1(line 28) the Hoare annotation is: (= ~counter~0 0) [2023-12-21 06:47:51,740 INFO L895 garLoopResultBuilder]: At program point L49(line 49) the Hoare annotation is: (= (mod (+ |ULTIMATE.start_main_~x~0#1| (* 18446744073709551615 |ULTIMATE.start_main_~y~0#1|) 1) 18446744073709551616) 0) [2023-12-21 06:47:51,740 INFO L899 garLoopResultBuilder]: For program point L49-1(line 49) no Hoare annotation was computed. [2023-12-21 06:47:51,740 INFO L899 garLoopResultBuilder]: For program point L35-1(lines 35 45) no Hoare annotation was computed. [2023-12-21 06:47:51,740 INFO L899 garLoopResultBuilder]: For program point L13(line 13) no Hoare annotation was computed. [2023-12-21 06:47:51,740 INFO L899 garLoopResultBuilder]: For program point L13-2(lines 12 14) no Hoare annotation was computed. [2023-12-21 06:47:51,740 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 12 14) the Hoare annotation is: true [2023-12-21 06:47:51,740 INFO L899 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 12 14) no Hoare annotation was computed. [2023-12-21 06:47:51,740 INFO L899 garLoopResultBuilder]: For program point L17(lines 17 18) no Hoare annotation was computed. [2023-12-21 06:47:51,740 INFO L899 garLoopResultBuilder]: For program point L16(lines 16 19) no Hoare annotation was computed. [2023-12-21 06:47:51,740 INFO L899 garLoopResultBuilder]: For program point L16-2(lines 15 21) no Hoare annotation was computed. [2023-12-21 06:47:51,740 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 15 21) no Hoare annotation was computed. [2023-12-21 06:47:51,740 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 15 21) the Hoare annotation is: true [2023-12-21 06:47:51,741 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 18) no Hoare annotation was computed. [2023-12-21 06:47:51,743 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2023-12-21 06:47:51,744 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-21 06:47:51,753 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.12 06:47:51 BoogieIcfgContainer [2023-12-21 06:47:51,753 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-21 06:47:51,754 INFO L158 Benchmark]: Toolchain (without parser) took 44940.74ms. Allocated memory is still 244.3MB. Free memory was 199.0MB in the beginning and 108.5MB in the end (delta: 90.5MB). Peak memory consumption was 91.5MB. Max. memory is 8.0GB. [2023-12-21 06:47:51,754 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 191.9MB. Free memory is still 140.4MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-21 06:47:51,755 INFO L158 Benchmark]: CACSL2BoogieTranslator took 193.44ms. Allocated memory is still 244.3MB. Free memory was 198.5MB in the beginning and 187.5MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2023-12-21 06:47:51,756 INFO L158 Benchmark]: Boogie Procedure Inliner took 21.96ms. Allocated memory is still 244.3MB. Free memory was 187.5MB in the beginning and 186.4MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-12-21 06:47:51,757 INFO L158 Benchmark]: Boogie Preprocessor took 23.19ms. Allocated memory is still 244.3MB. Free memory was 186.4MB in the beginning and 184.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-21 06:47:51,758 INFO L158 Benchmark]: RCFGBuilder took 213.65ms. Allocated memory is still 244.3MB. Free memory was 184.3MB in the beginning and 172.8MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-12-21 06:47:51,758 INFO L158 Benchmark]: TraceAbstraction took 44483.36ms. Allocated memory is still 244.3MB. Free memory was 172.3MB in the beginning and 108.5MB in the end (delta: 63.7MB). Peak memory consumption was 64.3MB. Max. memory is 8.0GB. [2023-12-21 06:47:51,760 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 191.9MB. Free memory is still 140.4MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 193.44ms. Allocated memory is still 244.3MB. Free memory was 198.5MB in the beginning and 187.5MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 21.96ms. Allocated memory is still 244.3MB. Free memory was 187.5MB in the beginning and 186.4MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 23.19ms. Allocated memory is still 244.3MB. Free memory was 186.4MB in the beginning and 184.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 213.65ms. Allocated memory is still 244.3MB. Free memory was 184.3MB in the beginning and 172.8MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * TraceAbstraction took 44483.36ms. Allocated memory is still 244.3MB. Free memory was 172.3MB in the beginning and 108.5MB in the end (delta: 63.7MB). Peak memory consumption was 64.3MB. 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: 18]: 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, 22 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 44.4s, OverallIterations: 6, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 9.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2 mSolverCounterUnknown, 40 SdHoareTripleChecker+Valid, 9.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 39 mSDsluCounter, 420 SdHoareTripleChecker+Invalid, 9.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 18 IncrementalHoareTripleChecker+Unchecked, 310 mSDsCounter, 8 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 155 IncrementalHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 8 mSolverCounterUnsat, 110 mSDtfsCounter, 155 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 226 GetRequests, 181 SyntacticMatches, 4 SemanticMatches, 41 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 8.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=27occurred in iteration=2, InterpolantAutomatonStates: 32, 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, 6 MinimizatonAttempts, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 16 PreInvPairs, 22 NumberOfFragments, 53 HoareAnnotationTreeSize, 16 FormulaSimplifications, 35 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FormulaSimplificationsInter, 79 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 33.1s InterpolantComputationTime, 151 NumberOfCodeBlocks, 151 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 219 ConstructedInterpolants, 2 QuantifiedInterpolants, 783 SizeOfPredicates, 9 NumberOfNonLiveVariables, 446 ConjunctsInSsa, 58 ConjunctsInUnsatCore, 10 InterpolantComputations, 3 PerfectInterpolantSequences, 49/62 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: 35]: Loop Invariant Derived loop invariant: ((((y == z) && (x == 1)) && (counter == 0)) || (((y == (z * z)) && (1 <= counter)) && (x == (z + 1)))) RESULT: Ultimate proved your program to be correct! [2023-12-21 06:47:51,791 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...