./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/loop-floats-scientific-comp/loop1-2.c --full-output --preprocessor.use.memory.slicer false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6ae2ee47 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/loop-floats-scientific-comp/loop1-2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash cc6c31757d65ac3409144284524de01d782484107762f8e5c588ca3f4aed3437 --preprocessor.use.memory.slicer false --- Real Ultimate output --- This is Ultimate 0.2.3-dev-6ae2ee4-m [2023-11-22 21:12:01,797 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-22 21:12:01,865 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-22 21:12:01,869 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-22 21:12:01,869 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-22 21:12:01,892 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-22 21:12:01,893 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-22 21:12:01,894 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-22 21:12:01,894 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-22 21:12:01,898 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-22 21:12:01,898 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-22 21:12:01,898 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-22 21:12:01,899 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-22 21:12:01,900 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-22 21:12:01,901 INFO L153 SettingsManager]: * Use SBE=true [2023-11-22 21:12:01,901 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-22 21:12:01,901 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-22 21:12:01,901 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-22 21:12:01,901 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-22 21:12:01,902 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-22 21:12:01,902 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-22 21:12:01,902 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-22 21:12:01,902 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-22 21:12:01,903 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-22 21:12:01,903 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-22 21:12:01,903 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-22 21:12:01,903 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-22 21:12:01,904 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-22 21:12:01,904 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-22 21:12:01,904 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-22 21:12:01,905 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-22 21:12:01,905 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-22 21:12:01,905 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-22 21:12:01,906 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-22 21:12:01,906 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-22 21:12:01,906 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-22 21:12:01,906 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-22 21:12:01,906 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-22 21:12:01,906 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-22 21:12:01,907 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-22 21:12:01,907 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-22 21:12:01,907 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-22 21:12:01,907 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cc6c31757d65ac3409144284524de01d782484107762f8e5c588ca3f4aed3437 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.preprocessor: Use memory slicer -> false [2023-11-22 21:12:02,109 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-22 21:12:02,128 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-22 21:12:02,130 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-22 21:12:02,131 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-22 21:12:02,131 INFO L274 PluginConnector]: CDTParser initialized [2023-11-22 21:12:02,132 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-floats-scientific-comp/loop1-2.c [2023-11-22 21:12:03,206 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-22 21:12:03,360 INFO L384 CDTParser]: Found 1 translation units. [2023-11-22 21:12:03,360 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-floats-scientific-comp/loop1-2.c [2023-11-22 21:12:03,366 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8412f3923/d74bb36c692449fc9b0e04af38127f0a/FLAG17ba8ac97 [2023-11-22 21:12:03,376 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8412f3923/d74bb36c692449fc9b0e04af38127f0a [2023-11-22 21:12:03,379 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-22 21:12:03,380 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-22 21:12:03,381 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-22 21:12:03,381 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-22 21:12:03,385 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-22 21:12:03,385 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 09:12:03" (1/1) ... [2023-11-22 21:12:03,386 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c1e6496 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:12:03, skipping insertion in model container [2023-11-22 21:12:03,386 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 09:12:03" (1/1) ... [2023-11-22 21:12:03,401 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-22 21:12:03,511 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-floats-scientific-comp/loop1-2.c[538,551] [2023-11-22 21:12:03,527 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-22 21:12:03,535 INFO L202 MainTranslator]: Completed pre-run [2023-11-22 21:12:03,545 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-floats-scientific-comp/loop1-2.c[538,551] [2023-11-22 21:12:03,551 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-22 21:12:03,562 INFO L206 MainTranslator]: Completed translation [2023-11-22 21:12:03,563 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:12:03 WrapperNode [2023-11-22 21:12:03,563 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-22 21:12:03,564 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-22 21:12:03,564 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-22 21:12:03,565 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-22 21:12:03,570 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:12:03" (1/1) ... [2023-11-22 21:12:03,577 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:12:03" (1/1) ... [2023-11-22 21:12:03,592 INFO L138 Inliner]: procedures = 15, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 40 [2023-11-22 21:12:03,592 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-22 21:12:03,593 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-22 21:12:03,593 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-22 21:12:03,593 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-22 21:12:03,599 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:12:03" (1/1) ... [2023-11-22 21:12:03,600 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:12:03" (1/1) ... [2023-11-22 21:12:03,601 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:12:03" (1/1) ... [2023-11-22 21:12:03,602 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:12:03" (1/1) ... [2023-11-22 21:12:03,613 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:12:03" (1/1) ... [2023-11-22 21:12:03,616 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:12:03" (1/1) ... [2023-11-22 21:12:03,617 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:12:03" (1/1) ... [2023-11-22 21:12:03,617 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:12:03" (1/1) ... [2023-11-22 21:12:03,622 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-22 21:12:03,623 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-22 21:12:03,624 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-22 21:12:03,624 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-22 21:12:03,625 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:12:03" (1/1) ... [2023-11-22 21:12:03,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-22 21:12:03,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:12:03,668 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-22 21:12:03,671 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-22 21:12:03,725 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-22 21:12:03,726 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-22 21:12:03,726 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-22 21:12:03,726 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-22 21:12:03,769 INFO L241 CfgBuilder]: Building ICFG [2023-11-22 21:12:03,770 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-22 21:12:03,897 INFO L282 CfgBuilder]: Performing block encoding [2023-11-22 21:12:03,917 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-22 21:12:03,921 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-22 21:12:03,922 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 09:12:03 BoogieIcfgContainer [2023-11-22 21:12:03,922 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-22 21:12:03,948 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-22 21:12:03,949 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-22 21:12:03,952 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-22 21:12:03,952 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 09:12:03" (1/3) ... [2023-11-22 21:12:03,953 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21904748 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 09:12:03, skipping insertion in model container [2023-11-22 21:12:03,953 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:12:03" (2/3) ... [2023-11-22 21:12:03,954 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21904748 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 09:12:03, skipping insertion in model container [2023-11-22 21:12:03,954 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 09:12:03" (3/3) ... [2023-11-22 21:12:03,955 INFO L112 eAbstractionObserver]: Analyzing ICFG loop1-2.c [2023-11-22 21:12:03,983 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-22 21:12:03,983 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-22 21:12:04,036 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-22 21:12:04,045 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;@38a71e76, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-22 21:12:04,045 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-22 21:12:04,048 INFO L276 IsEmpty]: Start isEmpty. Operand has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 states have internal predecessors, (12), 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) [2023-11-22 21:12:04,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-22 21:12:04,054 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 21:12:04,054 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-22 21:12:04,055 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 21:12:04,061 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:12:04,063 INFO L85 PathProgramCache]: Analyzing trace with hash 61508582, now seen corresponding path program 1 times [2023-11-22 21:12:04,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:12:04,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812490969] [2023-11-22 21:12:04,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:12:04,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:12:04,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:12:04,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 21:12:04,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:12:04,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812490969] [2023-11-22 21:12:04,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812490969] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 21:12:04,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 21:12:04,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-22 21:12:04,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52549857] [2023-11-22 21:12:04,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 21:12:04,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-22 21:12:04,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:12:04,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-22 21:12:04,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-22 21:12:04,232 INFO L87 Difference]: Start difference. First operand has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 states have internal predecessors, (12), 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) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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) [2023-11-22 21:12:04,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 21:12:04,249 INFO L93 Difference]: Finished difference Result 15 states and 18 transitions. [2023-11-22 21:12:04,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-22 21:12:04,251 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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) Word has length 5 [2023-11-22 21:12:04,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 21:12:04,257 INFO L225 Difference]: With dead ends: 15 [2023-11-22 21:12:04,257 INFO L226 Difference]: Without dead ends: 7 [2023-11-22 21:12:04,259 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-22 21:12:04,263 INFO L413 NwaCegarLoop]: 7 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, 7 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 [2023-11-22 21:12:04,263 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 7 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-22 21:12:04,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2023-11-22 21:12:04,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2023-11-22 21:12:04,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 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) [2023-11-22 21:12:04,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2023-11-22 21:12:04,291 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2023-11-22 21:12:04,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 21:12:04,292 INFO L495 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2023-11-22 21:12:04,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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) [2023-11-22 21:12:04,292 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2023-11-22 21:12:04,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-22 21:12:04,293 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 21:12:04,293 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-22 21:12:04,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-22 21:12:04,293 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 21:12:04,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:12:04,294 INFO L85 PathProgramCache]: Analyzing trace with hash 1900119729, now seen corresponding path program 1 times [2023-11-22 21:12:04,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:12:04,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677106942] [2023-11-22 21:12:04,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:12:04,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:12:04,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-22 21:12:04,321 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-22 21:12:04,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-22 21:12:04,356 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-22 21:12:04,357 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-22 21:12:04,358 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-11-22 21:12:04,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-22 21:12:04,373 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-22 21:12:04,376 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-22 21:12:04,416 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.11 09:12:04 BoogieIcfgContainer [2023-11-22 21:12:04,416 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-22 21:12:04,417 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-22 21:12:04,417 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-22 21:12:04,417 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-22 21:12:04,418 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 09:12:03" (3/4) ... [2023-11-22 21:12:04,444 INFO L140 WitnessPrinter]: No result that supports witness generation found [2023-11-22 21:12:04,445 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-22 21:12:04,446 INFO L158 Benchmark]: Toolchain (without parser) took 1066.33ms. Allocated memory was 146.8MB in the beginning and 201.3MB in the end (delta: 54.5MB). Free memory was 73.9MB in the beginning and 172.9MB in the end (delta: -99.0MB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-22 21:12:04,446 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 146.8MB. Free memory is still 97.7MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-22 21:12:04,447 INFO L158 Benchmark]: CACSL2BoogieTranslator took 183.02ms. Allocated memory is still 146.8MB. Free memory was 73.7MB in the beginning and 63.5MB in the end (delta: 10.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-22 21:12:04,447 INFO L158 Benchmark]: Boogie Procedure Inliner took 28.03ms. Allocated memory is still 146.8MB. Free memory was 63.3MB in the beginning and 62.0MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-22 21:12:04,447 INFO L158 Benchmark]: Boogie Preprocessor took 29.72ms. Allocated memory is still 146.8MB. Free memory was 62.0MB in the beginning and 60.9MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-22 21:12:04,448 INFO L158 Benchmark]: RCFGBuilder took 298.92ms. Allocated memory is still 146.8MB. Free memory was 60.8MB in the beginning and 50.3MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-22 21:12:04,448 INFO L158 Benchmark]: TraceAbstraction took 468.18ms. Allocated memory was 146.8MB in the beginning and 201.3MB in the end (delta: 54.5MB). Free memory was 115.8MB in the beginning and 172.9MB in the end (delta: -57.1MB). Peak memory consumption was 20.3MB. Max. memory is 16.1GB. [2023-11-22 21:12:04,448 INFO L158 Benchmark]: Witness Printer took 28.56ms. Allocated memory is still 201.3MB. Free memory is still 172.9MB. Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-22 21:12:04,450 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 146.8MB. Free memory is still 97.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 183.02ms. Allocated memory is still 146.8MB. Free memory was 73.7MB in the beginning and 63.5MB in the end (delta: 10.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 28.03ms. Allocated memory is still 146.8MB. Free memory was 63.3MB in the beginning and 62.0MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 29.72ms. Allocated memory is still 146.8MB. Free memory was 62.0MB in the beginning and 60.9MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 298.92ms. Allocated memory is still 146.8MB. Free memory was 60.8MB in the beginning and 50.3MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 468.18ms. Allocated memory was 146.8MB in the beginning and 201.3MB in the end (delta: 54.5MB). Free memory was 115.8MB in the beginning and 172.9MB in the end (delta: -57.1MB). Peak memory consumption was 20.3MB. Max. memory is 16.1GB. * Witness Printer took 28.56ms. Allocated memory is still 201.3MB. Free memory is still 172.9MB. Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * 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 - UnprovableResult [Line: 14]: Unable to prove that a call to reach_error is unreachable Unable to prove that a call to reach_error is unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 37, overapproximation of someBinaryArithmeticFLOAToperation at line 29. Possible FailurePath: [L20] float x = __VERIFIER_nondet_float() ; [L21] float exp = 1.0 ; [L22] float term = 1.0 ; [L23] unsigned int count = 1 ; [L24] float result = 2*(1/(1-x)) ; [L25] int temp ; VAL [count=1, exp=1, term=1] [L27] COND TRUE 1 [L29] term = term * (x/count) [L30] exp = exp + term [L31] count++ [L33] temp = __VERIFIER_nondet_int() [L34] COND TRUE temp ==0 VAL [count=2, temp=0] [L37] CALL __VERIFIER_assert( result >= exp ) [L14] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L14] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 9 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.4s, OverallIterations: 2, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 0 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 0 mSDsluCounter, 7 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 0 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2 IncrementalHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 0 mSolverCounterUnsat, 7 mSDtfsCounter, 2 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=9occurred in iteration=0, InterpolantAutomatonStates: 2, 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, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 11 NumberOfCodeBlocks, 11 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 4 ConstructedInterpolants, 0 QuantifiedInterpolants, 4 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2023-11-22 21:12:04,483 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/loop-floats-scientific-comp/loop1-2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash cc6c31757d65ac3409144284524de01d782484107762f8e5c588ca3f4aed3437 --preprocessor.use.memory.slicer false --- Real Ultimate output --- This is Ultimate 0.2.3-dev-6ae2ee4-m [2023-11-22 21:12:06,447 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-22 21:12:06,518 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2023-11-22 21:12:06,534 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-22 21:12:06,534 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-22 21:12:06,573 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-22 21:12:06,573 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-22 21:12:06,574 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-22 21:12:06,574 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-22 21:12:06,577 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-22 21:12:06,577 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-22 21:12:06,578 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-22 21:12:06,578 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-22 21:12:06,579 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-22 21:12:06,579 INFO L153 SettingsManager]: * Use SBE=true [2023-11-22 21:12:06,588 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-22 21:12:06,588 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-22 21:12:06,588 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-22 21:12:06,589 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-22 21:12:06,589 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-22 21:12:06,589 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-22 21:12:06,590 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-22 21:12:06,590 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-22 21:12:06,590 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-22 21:12:06,591 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-22 21:12:06,591 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-22 21:12:06,591 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-22 21:12:06,591 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-22 21:12:06,592 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-22 21:12:06,592 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-22 21:12:06,593 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-22 21:12:06,593 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-22 21:12:06,593 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-22 21:12:06,593 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-22 21:12:06,594 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-22 21:12:06,594 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-22 21:12:06,594 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-22 21:12:06,595 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2023-11-22 21:12:06,595 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-22 21:12:06,595 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-22 21:12:06,595 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-22 21:12:06,595 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-22 21:12:06,596 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-22 21:12:06,596 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-22 21:12:06,596 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2023-11-22 21:12:06,596 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cc6c31757d65ac3409144284524de01d782484107762f8e5c588ca3f4aed3437 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.preprocessor: Use memory slicer -> false [2023-11-22 21:12:06,881 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-22 21:12:06,914 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-22 21:12:06,916 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-22 21:12:06,917 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-22 21:12:06,917 INFO L274 PluginConnector]: CDTParser initialized [2023-11-22 21:12:06,919 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-floats-scientific-comp/loop1-2.c [2023-11-22 21:12:08,127 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-22 21:12:08,268 INFO L384 CDTParser]: Found 1 translation units. [2023-11-22 21:12:08,268 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-floats-scientific-comp/loop1-2.c [2023-11-22 21:12:08,274 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ff86c98bc/c951db2af15540ecb7c24ce01da7b064/FLAGdab4a6abf [2023-11-22 21:12:08,285 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ff86c98bc/c951db2af15540ecb7c24ce01da7b064 [2023-11-22 21:12:08,287 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-22 21:12:08,288 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-22 21:12:08,289 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-22 21:12:08,289 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-22 21:12:08,292 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-22 21:12:08,293 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 09:12:08" (1/1) ... [2023-11-22 21:12:08,293 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a343385 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:12:08, skipping insertion in model container [2023-11-22 21:12:08,293 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 09:12:08" (1/1) ... [2023-11-22 21:12:08,308 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-22 21:12:08,414 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-floats-scientific-comp/loop1-2.c[538,551] [2023-11-22 21:12:08,428 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-22 21:12:08,439 INFO L202 MainTranslator]: Completed pre-run [2023-11-22 21:12:08,447 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-floats-scientific-comp/loop1-2.c[538,551] [2023-11-22 21:12:08,454 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-22 21:12:08,468 INFO L206 MainTranslator]: Completed translation [2023-11-22 21:12:08,468 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:12:08 WrapperNode [2023-11-22 21:12:08,468 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-22 21:12:08,469 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-22 21:12:08,470 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-22 21:12:08,470 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-22 21:12:08,475 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:12:08" (1/1) ... [2023-11-22 21:12:08,484 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:12:08" (1/1) ... [2023-11-22 21:12:08,499 INFO L138 Inliner]: procedures = 16, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 40 [2023-11-22 21:12:08,499 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-22 21:12:08,500 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-22 21:12:08,500 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-22 21:12:08,500 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-22 21:12:08,505 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:12:08" (1/1) ... [2023-11-22 21:12:08,506 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:12:08" (1/1) ... [2023-11-22 21:12:08,517 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:12:08" (1/1) ... [2023-11-22 21:12:08,518 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:12:08" (1/1) ... [2023-11-22 21:12:08,527 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:12:08" (1/1) ... [2023-11-22 21:12:08,531 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:12:08" (1/1) ... [2023-11-22 21:12:08,535 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:12:08" (1/1) ... [2023-11-22 21:12:08,536 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:12:08" (1/1) ... [2023-11-22 21:12:08,538 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-22 21:12:08,541 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-22 21:12:08,541 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-22 21:12:08,541 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-22 21:12:08,542 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:12:08" (1/1) ... [2023-11-22 21:12:08,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-22 21:12:08,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:12:08,602 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-22 21:12:08,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-22 21:12:08,643 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-22 21:12:08,643 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-11-22 21:12:08,643 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-22 21:12:08,643 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-22 21:12:08,696 INFO L241 CfgBuilder]: Building ICFG [2023-11-22 21:12:08,699 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-22 21:12:11,871 INFO L282 CfgBuilder]: Performing block encoding [2023-11-22 21:12:11,889 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-22 21:12:11,891 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-22 21:12:11,892 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 09:12:11 BoogieIcfgContainer [2023-11-22 21:12:11,892 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-22 21:12:11,894 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-22 21:12:11,895 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-22 21:12:11,898 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-22 21:12:11,898 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 09:12:08" (1/3) ... [2023-11-22 21:12:11,899 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@340b34b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 09:12:11, skipping insertion in model container [2023-11-22 21:12:11,899 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:12:08" (2/3) ... [2023-11-22 21:12:11,900 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@340b34b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 09:12:11, skipping insertion in model container [2023-11-22 21:12:11,900 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 09:12:11" (3/3) ... [2023-11-22 21:12:11,902 INFO L112 eAbstractionObserver]: Analyzing ICFG loop1-2.c [2023-11-22 21:12:11,915 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-22 21:12:11,915 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-22 21:12:11,962 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-22 21:12:11,980 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;@4c915411, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-22 21:12:11,981 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-22 21:12:11,984 INFO L276 IsEmpty]: Start isEmpty. Operand has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 states have internal predecessors, (12), 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) [2023-11-22 21:12:11,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-22 21:12:11,989 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 21:12:11,991 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-22 21:12:11,991 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 21:12:11,996 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:12:11,997 INFO L85 PathProgramCache]: Analyzing trace with hash 61508582, now seen corresponding path program 1 times [2023-11-22 21:12:12,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-22 21:12:12,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [372391965] [2023-11-22 21:12:12,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:12:12,009 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-22 21:12:12,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-11-22 21:12:12,034 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-22 21:12:12,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-11-22 21:12:12,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:12:12,239 INFO L262 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-22 21:12:12,242 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:12:12,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 21:12:12,255 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-22 21:12:12,260 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-22 21:12:12,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [372391965] [2023-11-22 21:12:12,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [372391965] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 21:12:12,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 21:12:12,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-22 21:12:12,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045498544] [2023-11-22 21:12:12,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 21:12:12,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-22 21:12:12,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-22 21:12:12,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-22 21:12:12,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-22 21:12:12,304 INFO L87 Difference]: Start difference. First operand has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 states have internal predecessors, (12), 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) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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) [2023-11-22 21:12:13,383 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Array, Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-22 21:12:13,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 21:12:13,417 INFO L93 Difference]: Finished difference Result 15 states and 18 transitions. [2023-11-22 21:12:13,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-22 21:12:13,420 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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) Word has length 5 [2023-11-22 21:12:13,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 21:12:13,424 INFO L225 Difference]: With dead ends: 15 [2023-11-22 21:12:13,425 INFO L226 Difference]: Without dead ends: 7 [2023-11-22 21:12:13,426 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-22 21:12:13,430 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-22 21:12:13,432 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 7 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-22 21:12:13,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2023-11-22 21:12:13,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2023-11-22 21:12:13,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 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) [2023-11-22 21:12:13,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2023-11-22 21:12:13,452 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2023-11-22 21:12:13,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 21:12:13,452 INFO L495 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2023-11-22 21:12:13,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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) [2023-11-22 21:12:13,453 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2023-11-22 21:12:13,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-22 21:12:13,453 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 21:12:13,453 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-22 21:12:13,471 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-11-22 21:12:13,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-22 21:12:13,661 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 21:12:13,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:12:13,661 INFO L85 PathProgramCache]: Analyzing trace with hash 1900119729, now seen corresponding path program 1 times [2023-11-22 21:12:13,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-22 21:12:13,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2108489828] [2023-11-22 21:12:13,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:12:13,664 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-22 21:12:13,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-11-22 21:12:13,672 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-22 21:12:13,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-11-22 21:12:14,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-22 21:12:14,075 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-22 21:12:14,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-22 21:12:14,459 INFO L130 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2023-11-22 21:12:14,459 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-22 21:12:14,460 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-11-22 21:12:14,473 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-11-22 21:12:14,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-22 21:12:14,664 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-22 21:12:14,667 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-22 21:12:14,684 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.11 09:12:14 BoogieIcfgContainer [2023-11-22 21:12:14,685 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-22 21:12:14,685 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-22 21:12:14,685 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-22 21:12:14,685 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-22 21:12:14,686 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 09:12:11" (3/4) ... [2023-11-22 21:12:14,701 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2023-11-22 21:12:14,734 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2023-11-22 21:12:14,734 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-22 21:12:14,735 INFO L158 Benchmark]: Toolchain (without parser) took 6446.74ms. Allocated memory was 79.7MB in the beginning and 121.6MB in the end (delta: 41.9MB). Free memory was 41.7MB in the beginning and 80.7MB in the end (delta: -39.0MB). Peak memory consumption was 2.7MB. Max. memory is 16.1GB. [2023-11-22 21:12:14,735 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 79.7MB. Free memory is still 61.9MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-22 21:12:14,735 INFO L158 Benchmark]: CACSL2BoogieTranslator took 180.17ms. Allocated memory is still 79.7MB. Free memory was 41.4MB in the beginning and 54.4MB in the end (delta: -12.9MB). Peak memory consumption was 9.7MB. Max. memory is 16.1GB. [2023-11-22 21:12:14,735 INFO L158 Benchmark]: Boogie Procedure Inliner took 29.74ms. Allocated memory is still 79.7MB. Free memory was 54.4MB in the beginning and 52.7MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-22 21:12:14,736 INFO L158 Benchmark]: Boogie Preprocessor took 40.75ms. Allocated memory is still 79.7MB. Free memory was 52.7MB in the beginning and 51.4MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-22 21:12:14,736 INFO L158 Benchmark]: RCFGBuilder took 3351.47ms. Allocated memory is still 79.7MB. Free memory was 51.4MB in the beginning and 40.4MB in the end (delta: 11.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-22 21:12:14,736 INFO L158 Benchmark]: TraceAbstraction took 2790.69ms. Allocated memory was 79.7MB in the beginning and 121.6MB in the end (delta: 41.9MB). Free memory was 39.7MB in the beginning and 82.7MB in the end (delta: -43.1MB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-22 21:12:14,737 INFO L158 Benchmark]: Witness Printer took 48.85ms. Allocated memory is still 121.6MB. Free memory was 82.7MB in the beginning and 80.7MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-22 21:12:14,749 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 79.7MB. Free memory is still 61.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 180.17ms. Allocated memory is still 79.7MB. Free memory was 41.4MB in the beginning and 54.4MB in the end (delta: -12.9MB). Peak memory consumption was 9.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 29.74ms. Allocated memory is still 79.7MB. Free memory was 54.4MB in the beginning and 52.7MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 40.75ms. Allocated memory is still 79.7MB. Free memory was 52.7MB in the beginning and 51.4MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 3351.47ms. Allocated memory is still 79.7MB. Free memory was 51.4MB in the beginning and 40.4MB in the end (delta: 11.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 2790.69ms. Allocated memory was 79.7MB in the beginning and 121.6MB in the end (delta: 41.9MB). Free memory was 39.7MB in the beginning and 82.7MB in the end (delta: -43.1MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 48.85ms. Allocated memory is still 121.6MB. Free memory was 82.7MB in the beginning and 80.7MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * 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 - CounterExampleResult [Line: 14]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L20] float x = __VERIFIER_nondet_float() ; [L21] float exp = 1.0 ; [L22] float term = 1.0 ; [L23] unsigned int count = 1 ; [L24] float result = 2*(1/(1-x)) ; [L25] int temp ; VAL [count=1, exp=1.0, result=-2.0, term=1.0, x=2.0] [L27] COND TRUE 1 [L29] term = term * (x/count) [L30] exp = exp + term [L31] count++ [L33] temp = __VERIFIER_nondet_int() [L34] COND TRUE temp ==0 VAL [count=2, exp=3.0, result=-2.0, temp=0, term=2.0, x=2.0] [L37] CALL __VERIFIER_assert( result >= exp ) [L14] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L14] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 9 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 2.7s, OverallIterations: 2, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 1.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 0 SdHoareTripleChecker+Valid, 1.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 0 mSDsluCounter, 7 SdHoareTripleChecker+Invalid, 1.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 0 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2 IncrementalHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 0 mSolverCounterUnsat, 7 mSDtfsCounter, 2 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=9occurred in iteration=0, InterpolantAutomatonStates: 2, 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, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 11 NumberOfCodeBlocks, 11 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 4 ConstructedInterpolants, 0 QuantifiedInterpolants, 4 SizeOfPredicates, 0 NumberOfNonLiveVariables, 22 ConjunctsInSsa, 1 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2023-11-22 21:12:14,783 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE