/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/loops/nec20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-19 07:18:47,768 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-19 07:18:47,770 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-19 07:18:47,806 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-19 07:18:47,843 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-19 07:18:47,843 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-19 07:18:47,844 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-19 07:18:47,844 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-03-19 07:18:47,856 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-19 07:18:47,856 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-19 07:18:47,858 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-19 07:18:47,858 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-19 07:18:47,858 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-19 07:18:47,858 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-19 07:18:47,858 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-19 07:18:47,858 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-19 07:18:47,858 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-19 07:18:47,859 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-19 07:18:47,859 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-19 07:18:47,859 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-19 07:18:47,859 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-19 07:18:47,859 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-19 07:18:47,860 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-19 07:18:47,860 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 07:18:47,860 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-19 07:18:47,860 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-19 07:18:47,860 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-19 07:18:47,860 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-19 07:18:47,860 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-19 07:18:47,860 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-19 07:18:47,860 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-19 07:18:48,059 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-19 07:18:48,076 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-19 07:18:48,078 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-19 07:18:48,079 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-19 07:18:48,079 INFO L275 PluginConnector]: CDTParser initialized [2022-03-19 07:18:48,080 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/nec20.c [2022-03-19 07:18:48,130 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/23fb6c596/b0456c3b12eb40e3a892e8c4357f535b/FLAGd8da0a64a [2022-03-19 07:18:48,503 INFO L306 CDTParser]: Found 1 translation units. [2022-03-19 07:18:48,503 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/nec20.c [2022-03-19 07:18:48,509 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/23fb6c596/b0456c3b12eb40e3a892e8c4357f535b/FLAGd8da0a64a [2022-03-19 07:18:48,518 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/23fb6c596/b0456c3b12eb40e3a892e8c4357f535b [2022-03-19 07:18:48,520 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-19 07:18:48,521 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-19 07:18:48,533 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-19 07:18:48,533 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-19 07:18:48,536 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-19 07:18:48,536 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 07:18:48" (1/1) ... [2022-03-19 07:18:48,537 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@277548c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 07:18:48, skipping insertion in model container [2022-03-19 07:18:48,537 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 07:18:48" (1/1) ... [2022-03-19 07:18:48,541 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-19 07:18:48,551 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-19 07:18:48,666 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/nec20.c[356,369] [2022-03-19 07:18:48,681 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 07:18:48,686 INFO L203 MainTranslator]: Completed pre-run [2022-03-19 07:18:48,693 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/nec20.c[356,369] [2022-03-19 07:18:48,696 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 07:18:48,705 INFO L208 MainTranslator]: Completed translation [2022-03-19 07:18:48,706 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 07:18:48 WrapperNode [2022-03-19 07:18:48,706 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-19 07:18:48,707 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-19 07:18:48,707 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-19 07:18:48,707 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-19 07:18:48,714 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 07:18:48" (1/1) ... [2022-03-19 07:18:48,714 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 07:18:48" (1/1) ... [2022-03-19 07:18:48,718 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 07:18:48" (1/1) ... [2022-03-19 07:18:48,719 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 07:18:48" (1/1) ... [2022-03-19 07:18:48,721 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 07:18:48" (1/1) ... [2022-03-19 07:18:48,724 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 07:18:48" (1/1) ... [2022-03-19 07:18:48,725 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 07:18:48" (1/1) ... [2022-03-19 07:18:48,726 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-19 07:18:48,726 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-19 07:18:48,726 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-19 07:18:48,726 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-19 07:18:48,727 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 07:18:48" (1/1) ... [2022-03-19 07:18:48,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 07:18:48,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:18:48,780 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) [2022-03-19 07:18:48,791 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 [2022-03-19 07:18:48,818 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-19 07:18:48,819 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-19 07:18:48,819 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-19 07:18:48,819 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-19 07:18:48,819 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-19 07:18:48,819 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-19 07:18:48,819 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-19 07:18:48,819 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-19 07:18:48,819 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-19 07:18:48,819 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-03-19 07:18:48,820 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-19 07:18:48,820 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2022-03-19 07:18:48,820 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-19 07:18:48,820 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-19 07:18:48,820 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-19 07:18:48,820 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-19 07:18:48,820 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-19 07:18:48,820 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-19 07:18:48,820 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-19 07:18:48,866 INFO L234 CfgBuilder]: Building ICFG [2022-03-19 07:18:48,867 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-19 07:18:48,955 INFO L275 CfgBuilder]: Performing block encoding [2022-03-19 07:18:48,959 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-19 07:18:48,959 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-19 07:18:48,960 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 07:18:48 BoogieIcfgContainer [2022-03-19 07:18:48,960 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-19 07:18:48,962 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-19 07:18:48,962 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-19 07:18:48,964 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-19 07:18:48,965 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.03 07:18:48" (1/3) ... [2022-03-19 07:18:48,965 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1344f175 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 07:18:48, skipping insertion in model container [2022-03-19 07:18:48,965 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 07:18:48" (2/3) ... [2022-03-19 07:18:48,965 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1344f175 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 07:18:48, skipping insertion in model container [2022-03-19 07:18:48,965 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 07:18:48" (3/3) ... [2022-03-19 07:18:48,966 INFO L111 eAbstractionObserver]: Analyzing ICFG nec20.c [2022-03-19 07:18:48,970 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-19 07:18:48,970 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-19 07:18:49,022 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-19 07:18:49,027 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 [2022-03-19 07:18:49,027 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-19 07:18:49,049 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 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) [2022-03-19 07:18:49,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-19 07:18:49,070 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:18:49,070 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:18:49,071 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:18:49,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:18:49,075 INFO L85 PathProgramCache]: Analyzing trace with hash 1512797340, now seen corresponding path program 1 times [2022-03-19 07:18:49,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:18:49,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1575987544] [2022-03-19 07:18:49,097 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 07:18:49,097 INFO L85 PathProgramCache]: Analyzing trace with hash 1512797340, now seen corresponding path program 2 times [2022-03-19 07:18:49,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:18:49,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914145036] [2022-03-19 07:18:49,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:18:49,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:18:49,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:18:49,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:18:49,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:18:49,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:18:49,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:18:49,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914145036] [2022-03-19 07:18:49,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914145036] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:18:49,366 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:18:49,367 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 07:18:49,370 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:18:49,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1575987544] [2022-03-19 07:18:49,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1575987544] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:18:49,371 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:18:49,371 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 07:18:49,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775609196] [2022-03-19 07:18:49,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:18:49,376 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 07:18:49,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:18:49,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 07:18:49,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-19 07:18:49,401 INFO L87 Difference]: Start difference. First operand has 25 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 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 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 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) [2022-03-19 07:18:49,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:18:49,569 INFO L93 Difference]: Finished difference Result 53 states and 68 transitions. [2022-03-19 07:18:49,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 07:18:49,571 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 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 15 [2022-03-19 07:18:49,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:18:49,576 INFO L225 Difference]: With dead ends: 53 [2022-03-19 07:18:49,576 INFO L226 Difference]: Without dead ends: 22 [2022-03-19 07:18:49,578 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-03-19 07:18:49,582 INFO L912 BasicCegarLoop]: 26 mSDtfsCounter, 35 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 07:18:49,583 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 41 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 07:18:49,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-03-19 07:18:49,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 19. [2022-03-19 07:18:49,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 states have internal predecessors, (16), 3 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) [2022-03-19 07:18:49,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2022-03-19 07:18:49,616 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 15 [2022-03-19 07:18:49,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:18:49,616 INFO L478 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2022-03-19 07:18:49,616 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 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) [2022-03-19 07:18:49,617 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2022-03-19 07:18:49,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-19 07:18:49,617 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:18:49,617 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:18:49,617 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-19 07:18:49,618 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:18:49,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:18:49,618 INFO L85 PathProgramCache]: Analyzing trace with hash -2102111586, now seen corresponding path program 1 times [2022-03-19 07:18:49,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:18:49,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [9647890] [2022-03-19 07:18:49,619 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 07:18:49,619 INFO L85 PathProgramCache]: Analyzing trace with hash -2102111586, now seen corresponding path program 2 times [2022-03-19 07:18:49,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:18:49,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473100464] [2022-03-19 07:18:49,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:18:49,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:18:49,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:18:49,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:18:49,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:18:49,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:18:49,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:18:49,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473100464] [2022-03-19 07:18:49,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473100464] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:18:49,703 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:18:49,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 07:18:49,703 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:18:49,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [9647890] [2022-03-19 07:18:49,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [9647890] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:18:49,704 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:18:49,704 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 07:18:49,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475735886] [2022-03-19 07:18:49,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:18:49,704 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 07:18:49,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:18:49,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 07:18:49,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-19 07:18:49,705 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 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) [2022-03-19 07:18:49,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:18:49,765 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2022-03-19 07:18:49,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 07:18:49,765 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 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 15 [2022-03-19 07:18:49,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:18:49,766 INFO L225 Difference]: With dead ends: 29 [2022-03-19 07:18:49,766 INFO L226 Difference]: Without dead ends: 23 [2022-03-19 07:18:49,767 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-03-19 07:18:49,768 INFO L912 BasicCegarLoop]: 21 mSDtfsCounter, 16 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 07:18:49,768 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 33 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 07:18:49,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-03-19 07:18:49,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 17. [2022-03-19 07:18:49,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 3 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) [2022-03-19 07:18:49,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2022-03-19 07:18:49,773 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 15 [2022-03-19 07:18:49,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:18:49,773 INFO L478 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2022-03-19 07:18:49,774 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 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) [2022-03-19 07:18:49,774 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2022-03-19 07:18:49,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-19 07:18:49,774 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:18:49,774 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:18:49,774 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-19 07:18:49,775 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:18:49,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:18:49,775 INFO L85 PathProgramCache]: Analyzing trace with hash 1230699476, now seen corresponding path program 1 times [2022-03-19 07:18:49,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:18:49,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [947794108] [2022-03-19 07:18:50,041 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 07:18:50,042 INFO L85 PathProgramCache]: Analyzing trace with hash 1712637875, now seen corresponding path program 1 times [2022-03-19 07:18:50,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:18:50,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213898571] [2022-03-19 07:18:50,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:18:50,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:18:50,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 07:18:50,071 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 07:18:50,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 07:18:50,107 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 07:18:50,109 INFO L85 PathProgramCache]: Analyzing trace with hash 1230699476, now seen corresponding path program 2 times [2022-03-19 07:18:50,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:18:50,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431011304] [2022-03-19 07:18:50,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:18:50,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:18:50,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 07:18:50,140 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 07:18:50,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 07:18:50,156 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 07:18:50,156 INFO L130 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found a feasible trace [2022-03-19 07:18:50,156 INFO L614 BasicCegarLoop]: Counterexample is feasible [2022-03-19 07:18:50,158 INFO L788 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-19 07:18:50,160 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,SelfDestructingSolverStorable2 [2022-03-19 07:18:50,162 INFO L718 BasicCegarLoop]: Path program histogram: [2, 2, 2, 1] [2022-03-19 07:18:50,164 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-19 07:18:50,174 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.03 07:18:50 BoogieIcfgContainer [2022-03-19 07:18:50,174 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-19 07:18:50,178 INFO L158 Benchmark]: Toolchain (without parser) took 1653.50ms. Allocated memory was 187.7MB in the beginning and 283.1MB in the end (delta: 95.4MB). Free memory was 129.7MB in the beginning and 175.9MB in the end (delta: -46.2MB). Peak memory consumption was 48.0MB. Max. memory is 8.0GB. [2022-03-19 07:18:50,178 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 187.7MB. Free memory is still 146.4MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-19 07:18:50,179 INFO L158 Benchmark]: CACSL2BoogieTranslator took 173.02ms. Allocated memory was 187.7MB in the beginning and 283.1MB in the end (delta: 95.4MB). Free memory was 129.5MB in the beginning and 255.1MB in the end (delta: -125.6MB). Peak memory consumption was 7.7MB. Max. memory is 8.0GB. [2022-03-19 07:18:50,179 INFO L158 Benchmark]: Boogie Preprocessor took 19.04ms. Allocated memory is still 283.1MB. Free memory was 255.1MB in the beginning and 253.5MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-19 07:18:50,179 INFO L158 Benchmark]: RCFGBuilder took 234.38ms. Allocated memory is still 283.1MB. Free memory was 253.5MB in the beginning and 242.5MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-03-19 07:18:50,181 INFO L158 Benchmark]: TraceAbstraction took 1212.43ms. Allocated memory is still 283.1MB. Free memory was 242.0MB in the beginning and 175.9MB in the end (delta: 66.1MB). Peak memory consumption was 66.1MB. Max. memory is 8.0GB. [2022-03-19 07:18:50,184 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 187.7MB. Free memory is still 146.4MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 173.02ms. Allocated memory was 187.7MB in the beginning and 283.1MB in the end (delta: 95.4MB). Free memory was 129.5MB in the beginning and 255.1MB in the end (delta: -125.6MB). Peak memory consumption was 7.7MB. Max. memory is 8.0GB. * Boogie Preprocessor took 19.04ms. Allocated memory is still 283.1MB. Free memory was 255.1MB in the beginning and 253.5MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 234.38ms. Allocated memory is still 283.1MB. Free memory was 253.5MB in the beginning and 242.5MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * TraceAbstraction took 1212.43ms. Allocated memory is still 283.1MB. Free memory was 242.0MB in the beginning and 175.9MB in the end (delta: 66.1MB). Peak memory consumption was 66.1MB. 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 - CounterExampleResult [Line: 8]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L12] int b; [L15] _Bool k=__VERIFIER_nondet_bool(); [L16] unsigned int i,n,j; [L17] int a[1025]; [L19] COND TRUE \read(k) [L20] n=0 [L25] i=0 [L26] j=__VERIFIER_nondet_uint() [L27] COND FALSE !(j > 10000) [L30] COND TRUE i <= n [L31] i++ [L32] j= j +2 [L30] COND FALSE !(i <= n) [L35] a[i]=0 [L36] CALL __VERIFIER_assert(j<1025) [L7] COND TRUE !(cond) [L8] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 28 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 1.1s, OverallIterations: 3, TraceHistogramMax: 1, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 52 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 51 mSDsluCounter, 74 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 27 mSDsCounter, 9 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 96 IncrementalHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 9 mSolverCounterUnsat, 47 mSDtfsCounter, 96 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=25occurred in iteration=0, InterpolantAutomatonStates: 10, 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, 2 MinimizatonAttempts, 9 StatesRemovedByMinimization, 2 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 proved your program to be incorrect! [2022-03-19 07:18:50,200 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...