/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/float-benchs/zonotope_tight.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-02-01 00:16:29,334 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-01 00:16:29,335 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-01 00:16:29,393 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-01 00:16:29,424 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-01 00:16:29,425 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-01 00:16:29,425 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-01 00:16:29,428 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 00:16:29,433 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-01 00:16:29,433 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-01 00:16:29,434 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-01 00:16:29,434 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-01 00:16:29,443 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-01 00:16:29,443 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-01 00:16:29,443 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-01 00:16:29,443 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-01 00:16:29,443 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-01 00:16:29,444 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-01 00:16:29,444 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-01 00:16:29,444 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-01 00:16:29,444 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-01 00:16:29,444 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-01 00:16:29,444 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-01 00:16:29,444 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-01 00:16:29,444 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-01 00:16:29,444 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-02-01 00:16:29,444 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-01 00:16:29,444 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-02-01 00:16:29,445 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-01 00:16:29,633 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-01 00:16:29,654 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-01 00:16:29,657 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-01 00:16:29,658 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-01 00:16:29,660 INFO L275 PluginConnector]: CDTParser initialized [2022-02-01 00:16:29,662 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-benchs/zonotope_tight.c [2022-02-01 00:16:29,719 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/04932d86b/51972dd0bef24b56b6a5a75e190db66f/FLAGd99a214c4 [2022-02-01 00:16:30,047 INFO L306 CDTParser]: Found 1 translation units. [2022-02-01 00:16:30,048 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-benchs/zonotope_tight.c [2022-02-01 00:16:30,052 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/04932d86b/51972dd0bef24b56b6a5a75e190db66f/FLAGd99a214c4 [2022-02-01 00:16:30,474 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/04932d86b/51972dd0bef24b56b6a5a75e190db66f [2022-02-01 00:16:30,476 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-01 00:16:30,478 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-01 00:16:30,481 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-01 00:16:30,481 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-01 00:16:30,483 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-01 00:16:30,484 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.02 12:16:30" (1/1) ... [2022-02-01 00:16:30,484 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77cf7e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.02 12:16:30, skipping insertion in model container [2022-02-01 00:16:30,485 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.02 12:16:30" (1/1) ... [2022-02-01 00:16:30,489 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-01 00:16:30,497 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-01 00:16:30,632 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/float-benchs/zonotope_tight.c[577,590] [2022-02-01 00:16:30,643 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-01 00:16:30,649 INFO L203 MainTranslator]: Completed pre-run [2022-02-01 00:16:30,658 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/float-benchs/zonotope_tight.c[577,590] [2022-02-01 00:16:30,660 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-01 00:16:30,669 INFO L208 MainTranslator]: Completed translation [2022-02-01 00:16:30,669 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.02 12:16:30 WrapperNode [2022-02-01 00:16:30,669 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-01 00:16:30,670 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-01 00:16:30,670 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-01 00:16:30,670 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-01 00:16:30,677 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.02 12:16:30" (1/1) ... [2022-02-01 00:16:30,677 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.02 12:16:30" (1/1) ... [2022-02-01 00:16:30,684 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.02 12:16:30" (1/1) ... [2022-02-01 00:16:30,684 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.02 12:16:30" (1/1) ... [2022-02-01 00:16:30,691 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.02 12:16:30" (1/1) ... [2022-02-01 00:16:30,692 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.02 12:16:30" (1/1) ... [2022-02-01 00:16:30,693 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.02 12:16:30" (1/1) ... [2022-02-01 00:16:30,695 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-01 00:16:30,696 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-01 00:16:30,696 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-01 00:16:30,697 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-01 00:16:30,698 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.02 12:16:30" (1/1) ... [2022-02-01 00:16:30,702 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-01 00:16:30,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-01 00:16:30,725 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 00:16:30,749 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 00:16:30,770 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-01 00:16:30,771 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-01 00:16:30,771 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-01 00:16:30,771 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-02-01 00:16:30,771 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-01 00:16:30,771 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-01 00:16:30,771 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-01 00:16:30,771 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-01 00:16:30,771 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-01 00:16:30,771 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-01 00:16:30,771 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_double [2022-02-01 00:16:30,771 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-02-01 00:16:30,771 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-01 00:16:30,772 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-01 00:16:30,772 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-01 00:16:30,772 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-01 00:16:30,772 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-01 00:16:30,772 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-01 00:16:30,772 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-01 00:16:30,772 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-01 00:16:30,823 INFO L234 CfgBuilder]: Building ICFG [2022-02-01 00:16:30,824 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-01 00:16:30,946 INFO L275 CfgBuilder]: Performing block encoding [2022-02-01 00:16:30,950 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-01 00:16:30,950 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-02-01 00:16:30,951 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.02 12:16:30 BoogieIcfgContainer [2022-02-01 00:16:30,951 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-01 00:16:30,952 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-01 00:16:30,952 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-01 00:16:30,970 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-01 00:16:30,970 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.02 12:16:30" (1/3) ... [2022-02-01 00:16:30,970 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fd55326 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.02 12:16:30, skipping insertion in model container [2022-02-01 00:16:30,970 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.02 12:16:30" (2/3) ... [2022-02-01 00:16:30,971 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fd55326 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.02 12:16:30, skipping insertion in model container [2022-02-01 00:16:30,971 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.02 12:16:30" (3/3) ... [2022-02-01 00:16:30,972 INFO L111 eAbstractionObserver]: Analyzing ICFG zonotope_tight.c [2022-02-01 00:16:30,975 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-02-01 00:16:30,975 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-01 00:16:31,004 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-01 00:16:31,009 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 00:16:31,009 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-01 00:16:31,022 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-01 00:16:31,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-01 00:16:31,034 INFO L506 BasicCegarLoop]: Found error trace [2022-02-01 00:16:31,034 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-01 00:16:31,035 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-01 00:16:31,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-01 00:16:31,042 INFO L85 PathProgramCache]: Analyzing trace with hash 1690033282, now seen corresponding path program 1 times [2022-02-01 00:16:31,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-01 00:16:31,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1150396742] [2022-02-01 00:16:31,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-01 00:16:31,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-01 00:16:31,095 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-01 00:16:31,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-01 00:16:31,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-01 00:16:31,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-01 00:16:31,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-01 00:16:31,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-01 00:16:31,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-01 00:16:31,224 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-01 00:16:31,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1150396742] [2022-02-01 00:16:31,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1150396742] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-01 00:16:31,227 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-01 00:16:31,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-01 00:16:31,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443065502] [2022-02-01 00:16:31,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-01 00:16:31,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-01 00:16:31,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-01 00:16:31,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-01 00:16:31,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-01 00:16:31,257 INFO L87 Difference]: Start difference. First operand has 25 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) 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, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-02-01 00:16:31,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-01 00:16:31,305 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2022-02-01 00:16:31,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-01 00:16:31,307 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, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-02-01 00:16:31,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-01 00:16:31,311 INFO L225 Difference]: With dead ends: 41 [2022-02-01 00:16:31,312 INFO L226 Difference]: Without dead ends: 18 [2022-02-01 00:16:31,314 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 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 00:16:31,317 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 14 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-01 00:16:31,318 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 26 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-01 00:16:31,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-02-01 00:16:31,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-02-01 00:16:31,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-01 00:16:31,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2022-02-01 00:16:31,346 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 17 [2022-02-01 00:16:31,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-01 00:16:31,346 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2022-02-01 00:16:31,347 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, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-02-01 00:16:31,347 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2022-02-01 00:16:31,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-01 00:16:31,348 INFO L506 BasicCegarLoop]: Found error trace [2022-02-01 00:16:31,348 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-01 00:16:31,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-01 00:16:31,349 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-01 00:16:31,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-01 00:16:31,350 INFO L85 PathProgramCache]: Analyzing trace with hash -1924875644, now seen corresponding path program 1 times [2022-02-01 00:16:31,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-01 00:16:31,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [786353095] [2022-02-01 00:16:31,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-01 00:16:31,357 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-01 00:16:31,361 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-01 00:16:31,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-02-01 00:16:31,388 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-02-01 00:16:31,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-02-01 00:16:31,415 INFO L133 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2022-02-01 00:16:31,415 INFO L628 BasicCegarLoop]: Counterexample is feasible [2022-02-01 00:16:31,419 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-02-01 00:16:31,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-01 00:16:31,423 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1] [2022-02-01 00:16:31,426 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-02-01 00:16:31,438 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.02 12:16:31 BoogieIcfgContainer [2022-02-01 00:16:31,438 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-01 00:16:31,439 INFO L158 Benchmark]: Toolchain (without parser) took 960.41ms. Allocated memory is still 182.5MB. Free memory was 133.2MB in the beginning and 120.8MB in the end (delta: 12.4MB). Peak memory consumption was 13.8MB. Max. memory is 8.0GB. [2022-02-01 00:16:31,440 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 182.5MB. Free memory is still 149.2MB. There was no memory consumed. Max. memory is 8.0GB. [2022-02-01 00:16:31,441 INFO L158 Benchmark]: CACSL2BoogieTranslator took 188.67ms. Allocated memory is still 182.5MB. Free memory was 133.0MB in the beginning and 159.1MB in the end (delta: -26.2MB). Peak memory consumption was 11.7MB. Max. memory is 8.0GB. [2022-02-01 00:16:31,442 INFO L158 Benchmark]: Boogie Preprocessor took 25.10ms. Allocated memory is still 182.5MB. Free memory was 159.1MB in the beginning and 157.9MB in the end (delta: 1.2MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-01 00:16:31,443 INFO L158 Benchmark]: RCFGBuilder took 255.79ms. Allocated memory is still 182.5MB. Free memory was 157.9MB in the beginning and 147.6MB in the end (delta: 10.3MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-02-01 00:16:31,445 INFO L158 Benchmark]: TraceAbstraction took 485.92ms. Allocated memory is still 182.5MB. Free memory was 147.5MB in the beginning and 120.8MB in the end (delta: 26.7MB). Peak memory consumption was 27.3MB. Max. memory is 8.0GB. [2022-02-01 00:16:31,449 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 182.5MB. Free memory is still 149.2MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 188.67ms. Allocated memory is still 182.5MB. Free memory was 133.0MB in the beginning and 159.1MB in the end (delta: -26.2MB). Peak memory consumption was 11.7MB. Max. memory is 8.0GB. * Boogie Preprocessor took 25.10ms. Allocated memory is still 182.5MB. Free memory was 159.1MB in the beginning and 157.9MB in the end (delta: 1.2MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 255.79ms. Allocated memory is still 182.5MB. Free memory was 157.9MB in the beginning and 147.6MB in the end (delta: 10.3MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * TraceAbstraction took 485.92ms. Allocated memory is still 182.5MB. Free memory was 147.5MB in the beginning and 120.8MB in the end (delta: 26.7MB). Peak memory consumption was 27.3MB. 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: 14]: 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 27, overapproximation of someBinaryArithmeticDOUBLEoperation at line 25. Possible FailurePath: [L18] double x,y; [L20] x = __VERIFIER_nondet_double() [L21] CALL assume_abort_if_not(x >= 0. && x <= 10.) [L12] COND FALSE !(!cond) [L21] RET assume_abort_if_not(x >= 0. && x <= 10.) [L23] y = x*x - x [L24] COND FALSE !(y >= 0) [L25] y = x*x + 2. [L27] CALL __VERIFIER_assert(y >= 0. && y <= 4.) [L14] COND TRUE !(cond) [L14] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 28 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.4s, OverallIterations: 2, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 16 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 14 mSDsluCounter, 26 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 3 mSDsCounter, 3 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 4 IncrementalHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 3 mSolverCounterUnsat, 23 mSDtfsCounter, 4 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=25occurred 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 00:16:31,480 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...