/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/loop-floats-scientific-comp/loop1-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-02-01 00:21:12,723 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-01 00:21:12,725 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-01 00:21:12,765 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-02-01 00:21:12,765 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-02-01 00:21:12,766 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-02-01 00:21:12,778 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-02-01 00:21:12,779 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-02-01 00:21:12,780 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-02-01 00:21:12,797 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-02-01 00:21:12,799 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-02-01 00:21:12,800 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-02-01 00:21:12,801 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-01 00:21:12,804 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-01 00:21:12,805 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-01 00:21:12,807 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-01 00:21:12,807 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-01 00:21:12,809 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-01 00:21:12,813 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-01 00:21:12,817 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-01 00:21:12,818 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-01 00:21:12,821 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-01 00:21:12,822 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-01 00:21:12,823 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-01 00:21:12,845 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-02-01 00:21:12,846 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-02-01 00:21:12,846 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-02-01 00:21:12,847 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-02-01 00:21:12,847 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-02-01 00:21:12,848 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-02-01 00:21:12,848 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-02-01 00:21:12,849 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-02-01 00:21:12,851 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-02-01 00:21:12,851 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-02-01 00:21:12,852 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-02-01 00:21:12,852 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-02-01 00:21:12,853 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-02-01 00:21:12,853 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-02-01 00:21:12,853 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-01 00:21:12,853 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-01 00:21:12,854 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-01 00:21:12,855 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-02-01 00:21:12,862 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-01 00:21:12,862 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-01 00:21:12,864 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-01 00:21:12,864 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-01 00:21:12,864 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-01 00:21:12,864 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-01 00:21:12,864 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-01 00:21:12,864 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-01 00:21:12,864 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-01 00:21:12,864 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-01 00:21:12,865 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-01 00:21:12,865 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-01 00:21:12,865 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-01 00:21:12,865 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-01 00:21:12,865 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-01 00:21:12,865 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-01 00:21:12,865 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-01 00:21:12,865 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-02-01 00:21:12,865 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-01 00:21:12,866 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-02-01 00:21:12,866 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-01 00:21:13,193 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-01 00:21:13,219 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-01 00:21:13,221 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-01 00:21:13,222 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-01 00:21:13,235 INFO L275 PluginConnector]: CDTParser initialized [2022-02-01 00:21:13,236 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-floats-scientific-comp/loop1-1.c [2022-02-01 00:21:13,314 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/04c79f8b6/4d627004a9374c1caee6763c2a55337e/FLAGc92bfcaa7 [2022-02-01 00:21:13,744 INFO L306 CDTParser]: Found 1 translation units. [2022-02-01 00:21:13,744 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-floats-scientific-comp/loop1-1.c [2022-02-01 00:21:13,751 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/04c79f8b6/4d627004a9374c1caee6763c2a55337e/FLAGc92bfcaa7 [2022-02-01 00:21:14,187 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/04c79f8b6/4d627004a9374c1caee6763c2a55337e [2022-02-01 00:21:14,189 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-01 00:21:14,190 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-01 00:21:14,205 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-01 00:21:14,205 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-01 00:21:14,208 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-01 00:21:14,208 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.02 12:21:14" (1/1) ... [2022-02-01 00:21:14,209 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7345134f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.02 12:21:14, skipping insertion in model container [2022-02-01 00:21:14,209 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.02 12:21:14" (1/1) ... [2022-02-01 00:21:14,214 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-01 00:21:14,223 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-01 00:21:14,342 WARN L230 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/loop1-1.c[497,510] [2022-02-01 00:21:14,371 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-01 00:21:14,376 INFO L203 MainTranslator]: Completed pre-run [2022-02-01 00:21:14,385 WARN L230 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/loop1-1.c[497,510] [2022-02-01 00:21:14,391 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-01 00:21:14,401 INFO L208 MainTranslator]: Completed translation [2022-02-01 00:21:14,401 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.02 12:21:14 WrapperNode [2022-02-01 00:21:14,401 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-01 00:21:14,402 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-01 00:21:14,402 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-01 00:21:14,402 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-01 00:21:14,409 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.02 12:21:14" (1/1) ... [2022-02-01 00:21:14,409 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.02 12:21:14" (1/1) ... [2022-02-01 00:21:14,414 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.02 12:21:14" (1/1) ... [2022-02-01 00:21:14,414 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.02 12:21:14" (1/1) ... [2022-02-01 00:21:14,422 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.02 12:21:14" (1/1) ... [2022-02-01 00:21:14,424 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.02 12:21:14" (1/1) ... [2022-02-01 00:21:14,425 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.02 12:21:14" (1/1) ... [2022-02-01 00:21:14,427 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-01 00:21:14,427 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-01 00:21:14,428 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-01 00:21:14,428 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-01 00:21:14,431 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.02 12:21:14" (1/1) ... [2022-02-01 00:21:14,436 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-01 00:21:14,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-01 00:21:14,464 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) [2022-02-01 00:21:14,496 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 [2022-02-01 00:21:14,509 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-01 00:21:14,509 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-01 00:21:14,509 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-01 00:21:14,509 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-02-01 00:21:14,509 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-01 00:21:14,509 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-01 00:21:14,510 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-01 00:21:14,510 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-01 00:21:14,510 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-01 00:21:14,510 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-01 00:21:14,510 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-02-01 00:21:14,510 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-01 00:21:14,510 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_float [2022-02-01 00:21:14,510 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-02-01 00:21:14,510 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-01 00:21:14,510 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-01 00:21:14,510 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-01 00:21:14,510 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-01 00:21:14,510 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-01 00:21:14,510 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-01 00:21:14,511 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-01 00:21:14,576 INFO L234 CfgBuilder]: Building ICFG [2022-02-01 00:21:14,577 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-01 00:21:14,713 INFO L275 CfgBuilder]: Performing block encoding [2022-02-01 00:21:14,717 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-01 00:21:14,717 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-02-01 00:21:14,718 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.02 12:21:14 BoogieIcfgContainer [2022-02-01 00:21:14,718 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-01 00:21:14,719 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-01 00:21:14,719 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-01 00:21:14,733 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-01 00:21:14,734 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.02 12:21:14" (1/3) ... [2022-02-01 00:21:14,734 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62d1f32c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.02 12:21:14, skipping insertion in model container [2022-02-01 00:21:14,734 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.02 12:21:14" (2/3) ... [2022-02-01 00:21:14,735 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62d1f32c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.02 12:21:14, skipping insertion in model container [2022-02-01 00:21:14,735 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.02 12:21:14" (3/3) ... [2022-02-01 00:21:14,736 INFO L111 eAbstractionObserver]: Analyzing ICFG loop1-1.c [2022-02-01 00:21:14,739 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-02-01 00:21:14,739 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-01 00:21:14,810 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-01 00:21:14,815 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=AcceleratedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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, mLoopAccelerationTechnique=QVASR [2022-02-01 00:21:14,815 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-01 00:21:14,840 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-02-01 00:21:14,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-01 00:21:14,845 INFO L506 BasicCegarLoop]: Found error trace [2022-02-01 00:21:14,845 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-01 00:21:14,845 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-01 00:21:14,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-01 00:21:14,849 INFO L85 PathProgramCache]: Analyzing trace with hash 1583314543, now seen corresponding path program 1 times [2022-02-01 00:21:14,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-01 00:21:14,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [945097772] [2022-02-01 00:21:14,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-01 00:21:14,877 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-01 00:21:14,909 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-01 00:21:14,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-01 00:21:14,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-01 00:21:15,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-01 00:21:15,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-01 00:21:15,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-01 00:21:15,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-01 00:21:15,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-01 00:21:15,038 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-01 00:21:15,038 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-01 00:21:15,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [945097772] [2022-02-01 00:21:15,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [945097772] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-01 00:21:15,040 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-01 00:21:15,040 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-01 00:21:15,041 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11718368] [2022-02-01 00:21:15,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-01 00:21:15,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-01 00:21:15,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-01 00:21:15,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-01 00:21:15,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-01 00:21:15,066 INFO L87 Difference]: Start difference. First operand has 27 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-01 00:21:15,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-01 00:21:15,111 INFO L93 Difference]: Finished difference Result 47 states and 59 transitions. [2022-02-01 00:21:15,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-01 00:21:15,113 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2022-02-01 00:21:15,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-01 00:21:15,120 INFO L225 Difference]: With dead ends: 47 [2022-02-01 00:21:15,120 INFO L226 Difference]: Without dead ends: 20 [2022-02-01 00:21:15,123 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-01 00:21:15,129 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 15 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-01 00:21:15,130 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 28 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-01 00:21:15,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-02-01 00:21:15,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-02-01 00:21:15,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 12 states have internal predecessors, (13), 5 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-01 00:21:15,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2022-02-01 00:21:15,164 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 22 [2022-02-01 00:21:15,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-01 00:21:15,165 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2022-02-01 00:21:15,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-01 00:21:15,165 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2022-02-01 00:21:15,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-01 00:21:15,167 INFO L506 BasicCegarLoop]: Found error trace [2022-02-01 00:21:15,167 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-01 00:21:15,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-01 00:21:15,168 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-01 00:21:15,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-01 00:21:15,169 INFO L85 PathProgramCache]: Analyzing trace with hash 196140046, now seen corresponding path program 1 times [2022-02-01 00:21:15,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-01 00:21:15,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [28179295] [2022-02-01 00:21:15,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-01 00:21:15,171 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-01 00:21:15,174 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-01 00:21:15,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-02-01 00:21:15,212 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-02-01 00:21:15,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-02-01 00:21:15,255 INFO L133 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2022-02-01 00:21:15,255 INFO L628 BasicCegarLoop]: Counterexample is feasible [2022-02-01 00:21:15,259 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-02-01 00:21:15,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-01 00:21:15,264 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1] [2022-02-01 00:21:15,266 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-02-01 00:21:15,278 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.02 12:21:15 BoogieIcfgContainer [2022-02-01 00:21:15,278 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-01 00:21:15,279 INFO L158 Benchmark]: Toolchain (without parser) took 1089.01ms. Allocated memory is still 164.6MB. Free memory was 116.4MB in the beginning and 102.1MB in the end (delta: 14.2MB). Peak memory consumption was 14.3MB. Max. memory is 8.0GB. [2022-02-01 00:21:15,280 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 164.6MB. Free memory was 132.3MB in the beginning and 132.2MB in the end (delta: 74.2kB). There was no memory consumed. Max. memory is 8.0GB. [2022-02-01 00:21:15,280 INFO L158 Benchmark]: CACSL2BoogieTranslator took 196.29ms. Allocated memory is still 164.6MB. Free memory was 116.1MB in the beginning and 142.5MB in the end (delta: -26.4MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-02-01 00:21:15,282 INFO L158 Benchmark]: Boogie Preprocessor took 25.21ms. Allocated memory is still 164.6MB. Free memory was 142.5MB in the beginning and 140.9MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-02-01 00:21:15,283 INFO L158 Benchmark]: RCFGBuilder took 291.03ms. Allocated memory is still 164.6MB. Free memory was 140.9MB in the beginning and 130.4MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-02-01 00:21:15,285 INFO L158 Benchmark]: TraceAbstraction took 559.07ms. Allocated memory is still 164.6MB. Free memory was 130.0MB in the beginning and 102.1MB in the end (delta: 27.8MB). Peak memory consumption was 28.3MB. Max. memory is 8.0GB. [2022-02-01 00:21:15,289 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 164.6MB. Free memory was 132.3MB in the beginning and 132.2MB in the end (delta: 74.2kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 196.29ms. Allocated memory is still 164.6MB. Free memory was 116.1MB in the beginning and 142.5MB in the end (delta: -26.4MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 25.21ms. Allocated memory is still 164.6MB. Free memory was 142.5MB in the beginning and 140.9MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 291.03ms. Allocated memory is still 164.6MB. Free memory was 140.9MB in the beginning and 130.4MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * TraceAbstraction took 559.07ms. Allocated memory is still 164.6MB. Free memory was 130.0MB in the beginning and 102.1MB in the end (delta: 27.8MB). Peak memory consumption was 28.3MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 13]: Unable to prove that call to reach_error is unreachable Unable to prove that 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) [L11] COND FALSE !(!cond) [L21] RET assume_abort_if_not(x > -1.0) [L22] CALL assume_abort_if_not(x < 1.0) [L11] COND FALSE !(!cond) [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 ; [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 [L39] CALL __VERIFIER_assert( result >= exp ) [L13] COND TRUE !(cond) [L13] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 30 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.5s, OverallIterations: 2, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 18 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 15 mSDsluCounter, 28 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 3 mSDsCounter, 4 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 5 IncrementalHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 4 mSolverCounterUnsat, 25 mSDtfsCounter, 5 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=27occurred in iteration=0, InterpolantAutomatonStates: 3, 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: No data available, 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 [2022-02-01 00:21:15,312 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...