./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-floats-scientific-comp/loop1-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb08be1-b533-4868-a2be-21c763989488/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb08be1-b533-4868-a2be-21c763989488/bin/uautomizer-verify-uTZkv6EMXl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb08be1-b533-4868-a2be-21c763989488/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb08be1-b533-4868-a2be-21c763989488/bin/uautomizer-verify-uTZkv6EMXl/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-floats-scientific-comp/loop1-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb08be1-b533-4868-a2be-21c763989488/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb08be1-b533-4868-a2be-21c763989488/bin/uautomizer-verify-uTZkv6EMXl --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 259166f87cdd7847094aaf95c1b6c2506a27351f8fceb58c6f5bc2db5fb43f03 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 02:13:28,440 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 02:13:28,541 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb08be1-b533-4868-a2be-21c763989488/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-12 02:13:28,552 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 02:13:28,554 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 02:13:28,599 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 02:13:28,600 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 02:13:28,600 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 02:13:28,602 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 02:13:28,608 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 02:13:28,609 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 02:13:28,610 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 02:13:28,610 INFO L153 SettingsManager]: * Use SBE=true [2023-11-12 02:13:28,613 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 02:13:28,613 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 02:13:28,614 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 02:13:28,615 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 02:13:28,615 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 02:13:28,616 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 02:13:28,616 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 02:13:28,617 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 02:13:28,618 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 02:13:28,618 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 02:13:28,619 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 02:13:28,620 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 02:13:28,621 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 02:13:28,621 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 02:13:28,622 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 02:13:28,623 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:13:28,623 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 02:13:28,625 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 02:13:28,625 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 02:13:28,626 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-12 02:13:28,626 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 02:13:28,627 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-12 02:13:28,627 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 02:13:28,627 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-12 02:13:28,628 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 02:13:28,628 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-12 02:13:28,629 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:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb08be1-b533-4868-a2be-21c763989488/bin/uautomizer-verify-uTZkv6EMXl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb08be1-b533-4868-a2be-21c763989488/bin/uautomizer-verify-uTZkv6EMXl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 259166f87cdd7847094aaf95c1b6c2506a27351f8fceb58c6f5bc2db5fb43f03 [2023-11-12 02:13:28,952 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 02:13:28,977 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 02:13:28,980 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 02:13:28,981 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 02:13:28,982 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 02:13:28,983 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb08be1-b533-4868-a2be-21c763989488/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/loop-floats-scientific-comp/loop1-1.c [2023-11-12 02:13:32,271 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 02:13:32,518 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 02:13:32,519 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb08be1-b533-4868-a2be-21c763989488/sv-benchmarks/c/loop-floats-scientific-comp/loop1-1.c [2023-11-12 02:13:32,527 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb08be1-b533-4868-a2be-21c763989488/bin/uautomizer-verify-uTZkv6EMXl/data/f2abd5d27/fe0281ed0a51402ca3408f6fd414d9b2/FLAG85339197e [2023-11-12 02:13:32,550 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb08be1-b533-4868-a2be-21c763989488/bin/uautomizer-verify-uTZkv6EMXl/data/f2abd5d27/fe0281ed0a51402ca3408f6fd414d9b2 [2023-11-12 02:13:32,559 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 02:13:32,562 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 02:13:32,567 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 02:13:32,568 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 02:13:32,574 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 02:13:32,575 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:13:32" (1/1) ... [2023-11-12 02:13:32,579 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7885879b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:13:32, skipping insertion in model container [2023-11-12 02:13:32,579 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:13:32" (1/1) ... [2023-11-12 02:13:32,605 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 02:13:32,783 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb08be1-b533-4868-a2be-21c763989488/sv-benchmarks/c/loop-floats-scientific-comp/loop1-1.c[497,510] [2023-11-12 02:13:32,810 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:13:32,822 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 02:13:32,836 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb08be1-b533-4868-a2be-21c763989488/sv-benchmarks/c/loop-floats-scientific-comp/loop1-1.c[497,510] [2023-11-12 02:13:32,842 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:13:32,860 INFO L206 MainTranslator]: Completed translation [2023-11-12 02:13:32,861 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:13:32 WrapperNode [2023-11-12 02:13:32,861 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 02:13:32,862 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 02:13:32,863 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 02:13:32,863 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 02:13:32,872 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:13:32" (1/1) ... [2023-11-12 02:13:32,881 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:13:32" (1/1) ... [2023-11-12 02:13:32,904 INFO L138 Inliner]: procedures = 15, calls = 10, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 42 [2023-11-12 02:13:32,904 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 02:13:32,905 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 02:13:32,906 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 02:13:32,906 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 02:13:32,917 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:13:32" (1/1) ... [2023-11-12 02:13:32,918 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:13:32" (1/1) ... [2023-11-12 02:13:32,920 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:13:32" (1/1) ... [2023-11-12 02:13:32,920 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:13:32" (1/1) ... [2023-11-12 02:13:32,926 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:13:32" (1/1) ... [2023-11-12 02:13:32,930 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:13:32" (1/1) ... [2023-11-12 02:13:32,932 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:13:32" (1/1) ... [2023-11-12 02:13:32,934 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:13:32" (1/1) ... [2023-11-12 02:13:32,936 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 02:13:32,937 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 02:13:32,937 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 02:13:32,938 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 02:13:32,939 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:13:32" (1/1) ... [2023-11-12 02:13:32,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:13:32,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb08be1-b533-4868-a2be-21c763989488/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:13:32,995 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb08be1-b533-4868-a2be-21c763989488/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 02:13:33,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb08be1-b533-4868-a2be-21c763989488/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 02:13:33,053 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 02:13:33,054 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-12 02:13:33,054 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-12 02:13:33,054 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 02:13:33,055 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 02:13:33,055 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 02:13:33,146 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 02:13:33,149 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 02:13:33,309 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 02:13:33,316 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 02:13:33,316 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-12 02:13:33,319 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:13:33 BoogieIcfgContainer [2023-11-12 02:13:33,319 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 02:13:33,322 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 02:13:33,323 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 02:13:33,334 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 02:13:33,334 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 02:13:32" (1/3) ... [2023-11-12 02:13:33,335 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5100300e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:13:33, skipping insertion in model container [2023-11-12 02:13:33,335 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:13:32" (2/3) ... [2023-11-12 02:13:33,336 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5100300e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:13:33, skipping insertion in model container [2023-11-12 02:13:33,336 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:13:33" (3/3) ... [2023-11-12 02:13:33,338 INFO L112 eAbstractionObserver]: Analyzing ICFG loop1-1.c [2023-11-12 02:13:33,358 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 02:13:33,358 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 02:13:33,410 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:13:33,418 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;@2670b41d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:13:33,419 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 02:13:33,431 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 02:13:33,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-12 02:13:33,441 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:13:33,441 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:13:33,442 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:13:33,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:13:33,450 INFO L85 PathProgramCache]: Analyzing trace with hash 1019803906, now seen corresponding path program 1 times [2023-11-12 02:13:33,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:13:33,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147618846] [2023-11-12 02:13:33,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:13:33,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:13:33,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:13:33,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-12 02:13:33,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:13:33,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-12 02:13:33,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:13:33,761 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-12 02:13:33,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:13:33,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147618846] [2023-11-12 02:13:33,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147618846] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:13:33,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:13:33,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:13:33,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407610502] [2023-11-12 02:13:33,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:13:33,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-12 02:13:33,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:13:33,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-12 02:13:33,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 02:13:33,830 INFO L87 Difference]: Start difference. First operand has 19 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 02:13:33,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:13:33,858 INFO L93 Difference]: Finished difference Result 35 states and 46 transitions. [2023-11-12 02:13:33,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-12 02:13:33,861 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2023-11-12 02:13:33,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:13:33,869 INFO L225 Difference]: With dead ends: 35 [2023-11-12 02:13:33,870 INFO L226 Difference]: Without dead ends: 15 [2023-11-12 02:13:33,874 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 02:13:33,882 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:13:33,884 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:13:33,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2023-11-12 02:13:33,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2023-11-12 02:13:33,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 02:13:33,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2023-11-12 02:13:33,929 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 17 [2023-11-12 02:13:33,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:13:33,931 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2023-11-12 02:13:33,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 02:13:33,932 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2023-11-12 02:13:33,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-12 02:13:33,934 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:13:33,934 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:13:33,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 02:13:33,935 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:13:33,936 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:13:33,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1211444824, now seen corresponding path program 1 times [2023-11-12 02:13:33,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:13:33,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482011507] [2023-11-12 02:13:33,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:13:33,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:13:34,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 02:13:34,009 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-12 02:13:34,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 02:13:34,078 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-12 02:13:34,079 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-12 02:13:34,082 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-11-12 02:13:34,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 02:13:34,089 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-12 02:13:34,095 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-11-12 02:13:34,130 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.11 02:13:34 BoogieIcfgContainer [2023-11-12 02:13:34,131 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-12 02:13:34,131 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-12 02:13:34,132 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-12 02:13:34,132 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-12 02:13:34,133 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:13:33" (3/4) ... [2023-11-12 02:13:34,137 INFO L140 WitnessPrinter]: No result that supports witness generation found [2023-11-12 02:13:34,138 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-12 02:13:34,139 INFO L158 Benchmark]: Toolchain (without parser) took 1577.50ms. Allocated memory is still 159.4MB. Free memory was 119.5MB in the beginning and 70.2MB in the end (delta: 49.3MB). Peak memory consumption was 48.2MB. Max. memory is 16.1GB. [2023-11-12 02:13:34,140 INFO L158 Benchmark]: CDTParser took 0.31ms. Allocated memory is still 113.2MB. Free memory is still 64.0MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-12 02:13:34,142 INFO L158 Benchmark]: CACSL2BoogieTranslator took 294.33ms. Allocated memory is still 159.4MB. Free memory was 119.1MB in the beginning and 108.9MB in the end (delta: 10.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-12 02:13:34,146 INFO L158 Benchmark]: Boogie Procedure Inliner took 42.14ms. Allocated memory is still 159.4MB. Free memory was 108.9MB in the beginning and 107.5MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-12 02:13:34,146 INFO L158 Benchmark]: Boogie Preprocessor took 30.97ms. Allocated memory is still 159.4MB. Free memory was 107.5MB in the beginning and 106.3MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-12 02:13:34,150 INFO L158 Benchmark]: RCFGBuilder took 382.22ms. Allocated memory is still 159.4MB. Free memory was 105.9MB in the beginning and 96.3MB in the end (delta: 9.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-11-12 02:13:34,151 INFO L158 Benchmark]: TraceAbstraction took 808.45ms. Allocated memory is still 159.4MB. Free memory was 95.5MB in the beginning and 70.4MB in the end (delta: 25.2MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2023-11-12 02:13:34,152 INFO L158 Benchmark]: Witness Printer took 6.79ms. Allocated memory is still 159.4MB. Free memory was 70.4MB in the beginning and 70.2MB in the end (delta: 162.3kB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-12 02:13:34,160 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31ms. Allocated memory is still 113.2MB. Free memory is still 64.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 294.33ms. Allocated memory is still 159.4MB. Free memory was 119.1MB in the beginning and 108.9MB in the end (delta: 10.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 42.14ms. Allocated memory is still 159.4MB. Free memory was 108.9MB in the beginning and 107.5MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 30.97ms. Allocated memory is still 159.4MB. Free memory was 107.5MB in the beginning and 106.3MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 382.22ms. Allocated memory is still 159.4MB. Free memory was 105.9MB in the beginning and 96.3MB in the end (delta: 9.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 808.45ms. Allocated memory is still 159.4MB. Free memory was 95.5MB in the beginning and 70.4MB in the end (delta: 25.2MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. * Witness Printer took 6.79ms. Allocated memory is still 159.4MB. Free memory was 70.4MB in the beginning and 70.2MB in the end (delta: 162.3kB). There was no memory consumed. 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: 13]: 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 someBinaryDOUBLEComparisonOperation at line 22, overapproximation of someBinaryFLOATComparisonOperation at line 39, overapproximation of someBinaryArithmeticFLOAToperation at line 31. Possible FailurePath: [L20] float x = __VERIFIER_nondet_float() ; [L21] CALL assume_abort_if_not(x > -1.0) VAL [\old(cond)=1] [L11] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1] [L21] RET assume_abort_if_not(x > -1.0) [L22] CALL assume_abort_if_not(x < 1.0) VAL [\old(cond)=1] [L11] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1] [L22] RET assume_abort_if_not(x < 1.0) [L23] float exp = 1.0 ; [L24] float term = 1.0 ; [L25] unsigned int count = 1 ; [L26] float result = 2*(1/(1-x)) ; [L27] int temp ; VAL [count=1, exp=1, term=1] [L29] COND TRUE 1 [L31] term = term * (x/count) [L32] exp = exp + term [L33] count++ [L35] temp = __VERIFIER_nondet_int() [L36] COND TRUE temp ==0 VAL [count=2, temp=0] [L39] CALL __VERIFIER_assert( result >= exp ) [L13] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L13] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 19 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.7s, OverallIterations: 2, TraceHistogramMax: 2, 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, 20 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 0 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 0 IncrementalHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 0 mSolverCounterUnsat, 20 mSDtfsCounter, 0 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=19occurred 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, 0.1s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 35 NumberOfCodeBlocks, 35 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 16 ConstructedInterpolants, 0 QuantifiedInterpolants, 16 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 4/4 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 [2023-11-12 02:13:34,187 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb08be1-b533-4868-a2be-21c763989488/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with 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: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb08be1-b533-4868-a2be-21c763989488/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb08be1-b533-4868-a2be-21c763989488/bin/uautomizer-verify-uTZkv6EMXl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb08be1-b533-4868-a2be-21c763989488/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb08be1-b533-4868-a2be-21c763989488/bin/uautomizer-verify-uTZkv6EMXl/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-floats-scientific-comp/loop1-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb08be1-b533-4868-a2be-21c763989488/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb08be1-b533-4868-a2be-21c763989488/bin/uautomizer-verify-uTZkv6EMXl --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 259166f87cdd7847094aaf95c1b6c2506a27351f8fceb58c6f5bc2db5fb43f03 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 02:13:37,039 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 02:13:37,177 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb08be1-b533-4868-a2be-21c763989488/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2023-11-12 02:13:37,187 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 02:13:37,187 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 02:13:37,235 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 02:13:37,236 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 02:13:37,236 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 02:13:37,238 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 02:13:37,243 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 02:13:37,243 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 02:13:37,244 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 02:13:37,244 INFO L153 SettingsManager]: * Use SBE=true [2023-11-12 02:13:37,247 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 02:13:37,247 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 02:13:37,248 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 02:13:37,248 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 02:13:37,249 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 02:13:37,249 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 02:13:37,250 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 02:13:37,251 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 02:13:37,251 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-12 02:13:37,252 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-12 02:13:37,252 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-12 02:13:37,253 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 02:13:37,253 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 02:13:37,253 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 02:13:37,254 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 02:13:37,254 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 02:13:37,255 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 02:13:37,256 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:13:37,256 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 02:13:37,257 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 02:13:37,257 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 02:13:37,258 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2023-11-12 02:13:37,258 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-12 02:13:37,258 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-12 02:13:37,258 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 02:13:37,259 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-12 02:13:37,260 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 02:13:37,260 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2023-11-12 02:13:37,261 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-12 02:13:37,261 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:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb08be1-b533-4868-a2be-21c763989488/bin/uautomizer-verify-uTZkv6EMXl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb08be1-b533-4868-a2be-21c763989488/bin/uautomizer-verify-uTZkv6EMXl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 259166f87cdd7847094aaf95c1b6c2506a27351f8fceb58c6f5bc2db5fb43f03 [2023-11-12 02:13:37,639 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 02:13:37,673 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 02:13:37,676 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 02:13:37,677 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 02:13:37,678 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 02:13:37,679 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb08be1-b533-4868-a2be-21c763989488/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/loop-floats-scientific-comp/loop1-1.c [2023-11-12 02:13:40,924 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 02:13:41,188 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 02:13:41,188 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb08be1-b533-4868-a2be-21c763989488/sv-benchmarks/c/loop-floats-scientific-comp/loop1-1.c [2023-11-12 02:13:41,200 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb08be1-b533-4868-a2be-21c763989488/bin/uautomizer-verify-uTZkv6EMXl/data/0e9e91064/34ab7d4d52944fdfb750298f36541078/FLAG2b0435aca [2023-11-12 02:13:41,218 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb08be1-b533-4868-a2be-21c763989488/bin/uautomizer-verify-uTZkv6EMXl/data/0e9e91064/34ab7d4d52944fdfb750298f36541078 [2023-11-12 02:13:41,221 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 02:13:41,223 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 02:13:41,225 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 02:13:41,226 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 02:13:41,232 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 02:13:41,233 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:13:41" (1/1) ... [2023-11-12 02:13:41,234 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47cad254 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:13:41, skipping insertion in model container [2023-11-12 02:13:41,235 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:13:41" (1/1) ... [2023-11-12 02:13:41,258 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 02:13:41,456 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb08be1-b533-4868-a2be-21c763989488/sv-benchmarks/c/loop-floats-scientific-comp/loop1-1.c[497,510] [2023-11-12 02:13:41,473 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:13:41,489 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 02:13:41,503 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb08be1-b533-4868-a2be-21c763989488/sv-benchmarks/c/loop-floats-scientific-comp/loop1-1.c[497,510] [2023-11-12 02:13:41,509 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:13:41,541 INFO L206 MainTranslator]: Completed translation [2023-11-12 02:13:41,542 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:13:41 WrapperNode [2023-11-12 02:13:41,542 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 02:13:41,544 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 02:13:41,544 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 02:13:41,544 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 02:13:41,553 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:13:41" (1/1) ... [2023-11-12 02:13:41,584 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:13:41" (1/1) ... [2023-11-12 02:13:41,614 INFO L138 Inliner]: procedures = 16, calls = 10, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 42 [2023-11-12 02:13:41,615 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 02:13:41,616 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 02:13:41,617 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 02:13:41,617 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 02:13:41,627 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:13:41" (1/1) ... [2023-11-12 02:13:41,628 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:13:41" (1/1) ... [2023-11-12 02:13:41,640 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:13:41" (1/1) ... [2023-11-12 02:13:41,641 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:13:41" (1/1) ... [2023-11-12 02:13:41,658 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:13:41" (1/1) ... [2023-11-12 02:13:41,667 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:13:41" (1/1) ... [2023-11-12 02:13:41,674 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:13:41" (1/1) ... [2023-11-12 02:13:41,677 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:13:41" (1/1) ... [2023-11-12 02:13:41,682 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 02:13:41,684 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 02:13:41,685 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 02:13:41,685 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 02:13:41,686 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:13:41" (1/1) ... [2023-11-12 02:13:41,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:13:41,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb08be1-b533-4868-a2be-21c763989488/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:13:41,726 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb08be1-b533-4868-a2be-21c763989488/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 02:13:41,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb08be1-b533-4868-a2be-21c763989488/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 02:13:41,782 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 02:13:41,782 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-11-12 02:13:41,782 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-12 02:13:41,782 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-12 02:13:41,783 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 02:13:41,783 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 02:13:41,881 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 02:13:41,884 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 02:13:46,247 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 02:13:46,254 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 02:13:46,254 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-12 02:13:46,257 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:13:46 BoogieIcfgContainer [2023-11-12 02:13:46,257 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 02:13:46,259 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 02:13:46,260 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 02:13:46,263 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 02:13:46,264 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 02:13:41" (1/3) ... [2023-11-12 02:13:46,265 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@623805ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:13:46, skipping insertion in model container [2023-11-12 02:13:46,265 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:13:41" (2/3) ... [2023-11-12 02:13:46,265 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@623805ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:13:46, skipping insertion in model container [2023-11-12 02:13:46,266 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:13:46" (3/3) ... [2023-11-12 02:13:46,267 INFO L112 eAbstractionObserver]: Analyzing ICFG loop1-1.c [2023-11-12 02:13:46,288 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 02:13:46,288 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 02:13:46,335 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:13:46,341 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;@23be596a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:13:46,342 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 02:13:46,346 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 02:13:46,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-12 02:13:46,353 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:13:46,354 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:13:46,355 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:13:46,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:13:46,360 INFO L85 PathProgramCache]: Analyzing trace with hash 1019803906, now seen corresponding path program 1 times [2023-11-12 02:13:46,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-12 02:13:46,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1380257250] [2023-11-12 02:13:46,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:13:46,371 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 [2023-11-12 02:13:46,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb08be1-b533-4868-a2be-21c763989488/bin/uautomizer-verify-uTZkv6EMXl/mathsat [2023-11-12 02:13:46,417 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb08be1-b533-4868-a2be-21c763989488/bin/uautomizer-verify-uTZkv6EMXl/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) [2023-11-12 02:13:46,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb08be1-b533-4868-a2be-21c763989488/bin/uautomizer-verify-uTZkv6EMXl/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 [2023-11-12 02:13:46,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:13:46,723 INFO L262 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-12 02:13:46,727 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:13:46,749 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-12 02:13:46,749 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:13:46,750 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-12 02:13:46,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1380257250] [2023-11-12 02:13:46,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1380257250] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:13:46,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:13:46,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:13:46,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274084287] [2023-11-12 02:13:46,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:13:46,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-12 02:13:46,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-12 02:13:46,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-12 02:13:46,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 02:13:46,792 INFO L87 Difference]: Start difference. First operand has 19 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-12 02:13:46,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:13:46,812 INFO L93 Difference]: Finished difference Result 35 states and 46 transitions. [2023-11-12 02:13:46,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-12 02:13:46,814 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2023-11-12 02:13:46,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:13:46,821 INFO L225 Difference]: With dead ends: 35 [2023-11-12 02:13:46,822 INFO L226 Difference]: Without dead ends: 15 [2023-11-12 02:13:46,825 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 02:13:46,829 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:13:46,830 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:13:46,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2023-11-12 02:13:46,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2023-11-12 02:13:46,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 02:13:46,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2023-11-12 02:13:46,878 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 17 [2023-11-12 02:13:46,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:13:46,878 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2023-11-12 02:13:46,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-12 02:13:46,879 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2023-11-12 02:13:46,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-12 02:13:46,881 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:13:46,882 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:13:46,904 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb08be1-b533-4868-a2be-21c763989488/bin/uautomizer-verify-uTZkv6EMXl/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 [2023-11-12 02:13:47,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb08be1-b533-4868-a2be-21c763989488/bin/uautomizer-verify-uTZkv6EMXl/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 [2023-11-12 02:13:47,099 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:13:47,099 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:13:47,099 INFO L85 PathProgramCache]: Analyzing trace with hash 1211444824, now seen corresponding path program 1 times [2023-11-12 02:13:47,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-12 02:13:47,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [586247807] [2023-11-12 02:13:47,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:13:47,100 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 [2023-11-12 02:13:47,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb08be1-b533-4868-a2be-21c763989488/bin/uautomizer-verify-uTZkv6EMXl/mathsat [2023-11-12 02:13:47,103 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb08be1-b533-4868-a2be-21c763989488/bin/uautomizer-verify-uTZkv6EMXl/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) [2023-11-12 02:13:47,105 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb08be1-b533-4868-a2be-21c763989488/bin/uautomizer-verify-uTZkv6EMXl/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 [2023-11-12 02:13:48,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:13:48,903 INFO L262 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-12 02:13:48,908 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:14:20,374 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse3 ((_ to_fp 11 53) c_currentRoundingMode 1.0))) (let ((.cse0 ((_ to_fp 8 24) c_currentRoundingMode .cse3)) (.cse2 ((_ to_fp 11 53) c_currentRoundingMode |c_ULTIMATE.start_main_~x~0#1|))) (and (= |c_ULTIMATE.start_main_~exp~0#1| .cse0) (= |c_ULTIMATE.start_main_~term~0#1| .cse0) (= |c_ULTIMATE.start_main_~count~0#1| (_ bv1 32)) (= |c_ULTIMATE.start_main_~result~0#1| (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (_ bv2 32)) (let ((.cse1 ((_ to_fp 8 24) c_currentRoundingMode (_ bv1 32)))) (fp.div c_currentRoundingMode .cse1 (fp.sub c_currentRoundingMode .cse1 |c_ULTIMATE.start_main_~x~0#1|))))) (fp.gt .cse2 (fp.neg .cse3)) (fp.lt .cse2 .cse3) (= c_currentRoundingMode roundNearestTiesToEven)))) is different from false [2023-11-12 02:14:36,874 WARN L854 $PredicateComparison]: unable to prove that (exists ((|ULTIMATE.start_main_~x~0#1| (_ FloatingPoint 8 24))) (let ((.cse2 ((_ to_fp 11 53) roundNearestTiesToEven |ULTIMATE.start_main_~x~0#1|)) (.cse1 ((_ to_fp 11 53) roundNearestTiesToEven 1.0))) (and (= (let ((.cse0 ((_ to_fp 8 24) roundNearestTiesToEven .cse1))) (fp.add roundNearestTiesToEven .cse0 (fp.mul roundNearestTiesToEven .cse0 (fp.div roundNearestTiesToEven |ULTIMATE.start_main_~x~0#1| ((_ to_fp_unsigned 8 24) roundNearestTiesToEven (_ bv1 32)))))) |c_ULTIMATE.start_main_~exp~0#1|) (fp.gt .cse2 (fp.neg .cse1)) (= |c_ULTIMATE.start_main_~result~0#1| (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (_ bv2 32)) (let ((.cse3 ((_ to_fp 8 24) roundNearestTiesToEven (_ bv1 32)))) (fp.div roundNearestTiesToEven .cse3 (fp.sub roundNearestTiesToEven .cse3 |ULTIMATE.start_main_~x~0#1|))))) (fp.lt .cse2 .cse1)))) is different from false [2023-11-12 02:14:38,928 WARN L876 $PredicateComparison]: unable to prove that (exists ((|ULTIMATE.start_main_~x~0#1| (_ FloatingPoint 8 24))) (let ((.cse2 ((_ to_fp 11 53) roundNearestTiesToEven |ULTIMATE.start_main_~x~0#1|)) (.cse1 ((_ to_fp 11 53) roundNearestTiesToEven 1.0))) (and (= (let ((.cse0 ((_ to_fp 8 24) roundNearestTiesToEven .cse1))) (fp.add roundNearestTiesToEven .cse0 (fp.mul roundNearestTiesToEven .cse0 (fp.div roundNearestTiesToEven |ULTIMATE.start_main_~x~0#1| ((_ to_fp_unsigned 8 24) roundNearestTiesToEven (_ bv1 32)))))) |c_ULTIMATE.start_main_~exp~0#1|) (fp.gt .cse2 (fp.neg .cse1)) (= |c_ULTIMATE.start_main_~result~0#1| (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (_ bv2 32)) (let ((.cse3 ((_ to_fp 8 24) roundNearestTiesToEven (_ bv1 32)))) (fp.div roundNearestTiesToEven .cse3 (fp.sub roundNearestTiesToEven .cse3 |ULTIMATE.start_main_~x~0#1|))))) (fp.lt .cse2 .cse1)))) is different from true