/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-lit/css2003.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 18:15:59,953 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 18:15:59,954 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 18:15:59,986 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-20 18:15:59,992 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-20 18:15:59,992 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-20 18:15:59,993 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-20 18:15:59,994 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-20 18:15:59,994 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-20 18:15:59,995 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-20 18:15:59,996 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-20 18:15:59,997 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-20 18:15:59,998 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-20 18:16:00,007 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-20 18:16:00,008 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-20 18:16:00,009 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-20 18:16:00,009 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-20 18:16:00,011 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-20 18:16:00,016 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 18:16:00,017 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 18:16:00,017 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 18:16:00,018 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-03-20 18:16:00,023 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 18:16:00,023 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 18:16:00,024 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 18:16:00,024 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 18:16:00,024 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 18:16:00,024 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 18:16:00,025 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 18:16:00,025 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 18:16:00,025 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 18:16:00,025 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 18:16:00,025 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 18:16:00,025 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 18:16:00,025 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 18:16:00,025 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 18:16:00,026 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 18:16:00,026 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 18:16:00,026 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 18:16:00,026 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-20 18:16:00,026 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-20 18:16:00,026 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-20 18:16:00,026 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 18:16:00,026 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-20 18:16:00,027 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 18:16:00,180 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 18:16:00,201 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 18:16:00,203 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 18:16:00,204 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 18:16:00,204 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 18:16:00,205 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/css2003.i [2022-03-20 18:16:00,249 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7e0e90a02/d5d9548cbfcf457d8fc6e8a893c1c84d/FLAG4455c0fcb [2022-03-20 18:16:00,624 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 18:16:00,625 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/css2003.i [2022-03-20 18:16:00,630 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7e0e90a02/d5d9548cbfcf457d8fc6e8a893c1c84d/FLAG4455c0fcb [2022-03-20 18:16:00,642 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7e0e90a02/d5d9548cbfcf457d8fc6e8a893c1c84d [2022-03-20 18:16:00,645 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 18:16:00,647 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-20 18:16:00,648 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 18:16:00,648 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 18:16:00,651 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 18:16:00,688 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 06:16:00" (1/1) ... [2022-03-20 18:16:00,689 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1aa20b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:16:00, skipping insertion in model container [2022-03-20 18:16:00,689 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 06:16:00" (1/1) ... [2022-03-20 18:16:00,695 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 18:16:00,710 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 18:16:00,933 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-lit/css2003.i[895,908] [2022-03-20 18:16:00,948 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 18:16:00,957 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 18:16:00,969 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-lit/css2003.i[895,908] [2022-03-20 18:16:00,977 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 18:16:00,989 INFO L208 MainTranslator]: Completed translation [2022-03-20 18:16:00,990 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:16:00 WrapperNode [2022-03-20 18:16:00,990 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 18:16:00,991 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 18:16:00,991 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 18:16:00,991 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 18:16:01,002 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:16:00" (1/1) ... [2022-03-20 18:16:01,003 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:16:00" (1/1) ... [2022-03-20 18:16:01,010 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:16:00" (1/1) ... [2022-03-20 18:16:01,011 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:16:00" (1/1) ... [2022-03-20 18:16:01,020 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:16:00" (1/1) ... [2022-03-20 18:16:01,024 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:16:00" (1/1) ... [2022-03-20 18:16:01,027 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:16:00" (1/1) ... [2022-03-20 18:16:01,035 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 18:16:01,036 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 18:16:01,036 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 18:16:01,036 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 18:16:01,037 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:16:00" (1/1) ... [2022-03-20 18:16:01,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 18:16:01,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:16:01,071 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) [2022-03-20 18:16:01,077 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 [2022-03-20 18:16:01,140 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 18:16:01,140 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 18:16:01,147 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 18:16:01,147 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 18:16:01,148 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 18:16:01,148 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 18:16:01,148 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 18:16:01,148 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 18:16:01,149 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-03-20 18:16:01,149 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-03-20 18:16:01,150 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 18:16:01,150 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 18:16:01,150 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 18:16:01,150 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 18:16:01,151 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 18:16:01,151 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 18:16:01,152 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 18:16:01,152 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 18:16:01,152 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 18:16:01,152 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 18:16:01,152 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 18:16:01,152 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 18:16:01,234 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 18:16:01,235 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 18:16:01,322 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 18:16:01,327 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 18:16:01,327 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-20 18:16:01,328 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 06:16:01 BoogieIcfgContainer [2022-03-20 18:16:01,328 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 18:16:01,330 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 18:16:01,330 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 18:16:01,333 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 18:16:01,333 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 06:16:00" (1/3) ... [2022-03-20 18:16:01,333 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56517536 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 06:16:01, skipping insertion in model container [2022-03-20 18:16:01,334 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:16:00" (2/3) ... [2022-03-20 18:16:01,334 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56517536 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 06:16:01, skipping insertion in model container [2022-03-20 18:16:01,334 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 06:16:01" (3/3) ... [2022-03-20 18:16:01,335 INFO L111 eAbstractionObserver]: Analyzing ICFG css2003.i [2022-03-20 18:16:01,339 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-20 18:16:01,339 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 18:16:01,374 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 18:16:01,380 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, 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 [2022-03-20 18:16:01,380 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 18:16:01,391 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 14 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 18:16:01,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-20 18:16:01,397 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:16:01,398 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:16:01,398 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:16:01,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:16:01,403 INFO L85 PathProgramCache]: Analyzing trace with hash 255759161, now seen corresponding path program 1 times [2022-03-20 18:16:01,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:16:01,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [875103124] [2022-03-20 18:16:01,419 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 18:16:01,420 INFO L85 PathProgramCache]: Analyzing trace with hash 255759161, now seen corresponding path program 2 times [2022-03-20 18:16:01,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:16:01,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593751572] [2022-03-20 18:16:01,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:16:01,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:16:01,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:16:01,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:16:01,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:16:01,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:16:01,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:16:01,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593751572] [2022-03-20 18:16:01,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593751572] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:16:01,734 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:16:01,735 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 18:16:01,737 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:16:01,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [875103124] [2022-03-20 18:16:01,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [875103124] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:16:01,738 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:16:01,738 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 18:16:01,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728701812] [2022-03-20 18:16:01,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:16:01,743 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 18:16:01,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:16:01,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 18:16:01,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-03-20 18:16:01,766 INFO L87 Difference]: Start difference. First operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 14 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 6 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:16:01,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:16:01,912 INFO L93 Difference]: Finished difference Result 34 states and 42 transitions. [2022-03-20 18:16:01,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 18:16:01,914 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 6 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-03-20 18:16:01,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:16:01,925 INFO L225 Difference]: With dead ends: 34 [2022-03-20 18:16:01,925 INFO L226 Difference]: Without dead ends: 0 [2022-03-20 18:16:01,928 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-03-20 18:16:01,931 INFO L913 BasicCegarLoop]: 16 mSDtfsCounter, 21 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:16:01,932 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 49 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 18:16:01,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-20 18:16:01,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-20 18:16:01,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-20 18:16:01,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-20 18:16:01,948 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 12 [2022-03-20 18:16:01,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:16:01,949 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-20 18:16:01,949 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 6 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:16:01,949 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-20 18:16:01,949 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-20 18:16:01,951 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-20 18:16:01,951 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 18:16:01,952 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-03-20 18:16:02,045 INFO L882 garLoopResultBuilder]: For program point reach_errorEXIT(line 12) no Hoare annotation was computed. [2022-03-20 18:16:02,046 INFO L882 garLoopResultBuilder]: For program point reach_errorENTRY(line 12) no Hoare annotation was computed. [2022-03-20 18:16:02,046 INFO L882 garLoopResultBuilder]: For program point L12-1(line 12) no Hoare annotation was computed. [2022-03-20 18:16:02,046 INFO L882 garLoopResultBuilder]: For program point L15(line 15) no Hoare annotation was computed. [2022-03-20 18:16:02,046 INFO L882 garLoopResultBuilder]: For program point assume_abort_if_notENTRY(lines 14 16) no Hoare annotation was computed. [2022-03-20 18:16:02,046 INFO L882 garLoopResultBuilder]: For program point L15-2(lines 14 16) no Hoare annotation was computed. [2022-03-20 18:16:02,047 INFO L882 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 14 16) no Hoare annotation was computed. [2022-03-20 18:16:02,048 INFO L878 garLoopResultBuilder]: At program point L34-1(lines 30 35) the Hoare annotation is: (or (and (<= 0 main_~k~0) (<= main_~k~0 1) (= (+ (- 1) main_~i~0) 0)) (let ((.cse0 (+ main_~i~0 main_~k~0))) (and (<= 2 main_~i~0) (<= .cse0 2) (<= 1 .cse0)))) [2022-03-20 18:16:02,048 INFO L885 garLoopResultBuilder]: At program point mainENTRY(lines 24 37) the Hoare annotation is: true [2022-03-20 18:16:02,048 INFO L878 garLoopResultBuilder]: At program point L29(line 29) the Hoare annotation is: (= (+ (- 1) main_~i~0) 0) [2022-03-20 18:16:02,049 INFO L878 garLoopResultBuilder]: At program point L30-2(lines 30 35) the Hoare annotation is: (let ((.cse0 (+ main_~i~0 main_~k~0))) (and (<= 2 main_~i~0) (<= .cse0 2) (<= 1 .cse0))) [2022-03-20 18:16:02,049 INFO L878 garLoopResultBuilder]: At program point mainEXIT(lines 24 37) the Hoare annotation is: (or (let ((.cse0 (+ main_~i~0 main_~k~0))) (and (<= 2 main_~i~0) (<= .cse0 2) (<= 1 .cse0))) (= (+ (- 1) main_~i~0) 0)) [2022-03-20 18:16:02,049 INFO L878 garLoopResultBuilder]: At program point mainFINAL(lines 24 37) the Hoare annotation is: (or (let ((.cse0 (+ main_~i~0 main_~k~0))) (and (<= 2 main_~i~0) (<= .cse0 2) (<= 1 .cse0))) (= (+ (- 1) main_~i~0) 0)) [2022-03-20 18:16:02,052 INFO L878 garLoopResultBuilder]: At program point L34(line 34) the Hoare annotation is: (let ((.cse0 (+ main_~i~0 main_~k~0))) (and (<= 2 main_~i~0) (<= .cse0 2) (<= 1 .cse0))) [2022-03-20 18:16:02,052 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2022-03-20 18:16:02,053 INFO L878 garLoopResultBuilder]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|)) [2022-03-20 18:16:02,053 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2022-03-20 18:16:02,053 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2022-03-20 18:16:02,054 INFO L885 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-03-20 18:16:02,054 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-03-20 18:16:02,054 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2022-03-20 18:16:02,054 INFO L878 garLoopResultBuilder]: At program point L18-2(lines 17 22) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2022-03-20 18:16:02,054 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 17 22) the Hoare annotation is: true [2022-03-20 18:16:02,055 INFO L878 garLoopResultBuilder]: At program point __VERIFIER_assertEXIT(lines 17 22) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2022-03-20 18:16:02,055 INFO L878 garLoopResultBuilder]: At program point L19(line 19) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2022-03-20 18:16:02,055 INFO L878 garLoopResultBuilder]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 19) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2022-03-20 18:16:02,055 INFO L878 garLoopResultBuilder]: At program point L18(lines 18 20) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2022-03-20 18:16:02,058 INFO L719 BasicCegarLoop]: Path program histogram: [2] [2022-03-20 18:16:02,075 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-20 18:16:02,087 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 06:16:02 BoogieIcfgContainer [2022-03-20 18:16:02,087 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-20 18:16:02,088 INFO L158 Benchmark]: Toolchain (without parser) took 1440.55ms. Allocated memory is still 178.3MB. Free memory was 124.8MB in the beginning and 101.8MB in the end (delta: 23.0MB). Peak memory consumption was 23.1MB. Max. memory is 8.0GB. [2022-03-20 18:16:02,088 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 178.3MB. Free memory is still 141.3MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-20 18:16:02,088 INFO L158 Benchmark]: CACSL2BoogieTranslator took 342.22ms. Allocated memory is still 178.3MB. Free memory was 124.7MB in the beginning and 152.2MB in the end (delta: -27.5MB). Peak memory consumption was 6.3MB. Max. memory is 8.0GB. [2022-03-20 18:16:02,088 INFO L158 Benchmark]: Boogie Preprocessor took 43.91ms. Allocated memory is still 178.3MB. Free memory was 152.2MB in the beginning and 150.8MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-20 18:16:02,089 INFO L158 Benchmark]: RCFGBuilder took 292.66ms. Allocated memory is still 178.3MB. Free memory was 150.8MB in the beginning and 140.6MB in the end (delta: 10.2MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-03-20 18:16:02,089 INFO L158 Benchmark]: TraceAbstraction took 757.43ms. Allocated memory is still 178.3MB. Free memory was 140.3MB in the beginning and 101.8MB in the end (delta: 38.5MB). Peak memory consumption was 38.8MB. Max. memory is 8.0GB. [2022-03-20 18:16:02,090 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 178.3MB. Free memory is still 141.3MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 342.22ms. Allocated memory is still 178.3MB. Free memory was 124.7MB in the beginning and 152.2MB in the end (delta: -27.5MB). Peak memory consumption was 6.3MB. Max. memory is 8.0GB. * Boogie Preprocessor took 43.91ms. Allocated memory is still 178.3MB. Free memory was 152.2MB in the beginning and 150.8MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 292.66ms. Allocated memory is still 178.3MB. Free memory was 150.8MB in the beginning and 140.6MB in the end (delta: 10.2MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * TraceAbstraction took 757.43ms. Allocated memory is still 178.3MB. Free memory was 140.3MB in the beginning and 101.8MB in the end (delta: 38.5MB). Peak memory consumption was 38.8MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 19]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 27 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.7s, OverallIterations: 1, TraceHistogramMax: 1, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 21 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 21 mSDsluCounter, 49 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 33 mSDsCounter, 8 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 71 IncrementalHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 8 mSolverCounterUnsat, 16 mSDtfsCounter, 71 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred in iteration=0, InterpolantAutomatonStates: 8, 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: 0.0s HoareAnnotationTime, 20 LocationsWithAnnotation, 26 PreInvPairs, 38 NumberOfFragments, 145 HoareAnnotationTreeSize, 26 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 20 FomulaSimplificationsInter, 15 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 30]: Loop Invariant Derived loop invariant: ((0 <= k && k <= 1) && -1 + i == 0) || ((2 <= i && i + k <= 2) && 1 <= i + k) - ProcedureContractResult [Line: 24]: Procedure Contract for main Derived contract for procedure main: ((2 <= i && i + k <= 2) && 1 <= i + k) || -1 + i == 0 - ProcedureContractResult [Line: 17]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: \old(cond) == 0 || !(cond == 0) RESULT: Ultimate proved your program to be correct! [2022-03-20 18:16:02,119 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...