/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/trex04.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 23:22:33,591 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 23:22:33,593 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 23:22:33,695 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-31 23:22:33,747 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 23:22:33,748 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 23:22:33,748 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 23:22:33,749 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-01-31 23:22:33,758 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 23:22:33,759 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 23:22:33,760 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 23:22:33,760 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 23:22:33,760 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 23:22:33,760 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 23:22:33,761 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 23:22:33,761 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 23:22:33,761 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 23:22:33,761 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 23:22:33,761 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 23:22:33,762 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 23:22:33,762 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 23:22:33,762 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 23:22:33,762 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 23:22:33,762 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 23:22:33,763 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 23:22:33,763 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-01-31 23:22:33,763 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-31 23:22:33,763 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-01-31 23:22:33,763 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 23:22:33,967 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 23:22:33,988 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 23:22:33,990 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 23:22:33,990 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 23:22:33,993 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 23:22:33,994 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/trex04.c [2022-01-31 23:22:34,048 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0181bc86a/741e74b86eaa4371b9f7b89660318574/FLAG0832488ea [2022-01-31 23:22:34,446 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 23:22:34,447 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/trex04.c [2022-01-31 23:22:34,455 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0181bc86a/741e74b86eaa4371b9f7b89660318574/FLAG0832488ea [2022-01-31 23:22:34,855 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0181bc86a/741e74b86eaa4371b9f7b89660318574 [2022-01-31 23:22:34,857 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 23:22:34,859 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-31 23:22:34,862 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 23:22:34,862 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 23:22:34,865 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 23:22:34,866 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 11:22:34" (1/1) ... [2022-01-31 23:22:34,867 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33ee2793 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:22:34, skipping insertion in model container [2022-01-31 23:22:34,867 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 11:22:34" (1/1) ... [2022-01-31 23:22:34,872 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 23:22:34,883 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 23:22:35,039 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/trex04.c[405,418] [2022-01-31 23:22:35,049 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 23:22:35,054 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 23:22:35,063 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/trex04.c[405,418] [2022-01-31 23:22:35,067 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 23:22:35,076 INFO L208 MainTranslator]: Completed translation [2022-01-31 23:22:35,076 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:22:35 WrapperNode [2022-01-31 23:22:35,076 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 23:22:35,077 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 23:22:35,077 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 23:22:35,077 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 23:22:35,085 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:22:35" (1/1) ... [2022-01-31 23:22:35,085 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:22:35" (1/1) ... [2022-01-31 23:22:35,089 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:22:35" (1/1) ... [2022-01-31 23:22:35,090 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:22:35" (1/1) ... [2022-01-31 23:22:35,097 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:22:35" (1/1) ... [2022-01-31 23:22:35,099 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:22:35" (1/1) ... [2022-01-31 23:22:35,100 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:22:35" (1/1) ... [2022-01-31 23:22:35,106 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 23:22:35,107 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 23:22:35,107 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 23:22:35,107 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 23:22:35,114 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:22:35" (1/1) ... [2022-01-31 23:22:35,120 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 23:22:35,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 23:22:35,136 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) [2022-01-31 23:22:35,142 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 [2022-01-31 23:22:35,165 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 23:22:35,165 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 23:22:35,165 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 23:22:35,165 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-31 23:22:35,165 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 23:22:35,165 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2022-01-31 23:22:35,165 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 23:22:35,166 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 23:22:35,166 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 23:22:35,166 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 23:22:35,166 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 23:22:35,166 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-31 23:22:35,166 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 23:22:35,166 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2022-01-31 23:22:35,166 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 23:22:35,166 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2022-01-31 23:22:35,167 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 23:22:35,167 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 23:22:35,167 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 23:22:35,167 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 23:22:35,167 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 23:22:35,167 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 23:22:35,167 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 23:22:35,218 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 23:22:35,220 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 23:22:35,397 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 23:22:35,402 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 23:22:35,403 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-01-31 23:22:35,404 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 11:22:35 BoogieIcfgContainer [2022-01-31 23:22:35,404 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 23:22:35,405 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 23:22:35,406 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 23:22:35,437 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 23:22:35,437 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 11:22:34" (1/3) ... [2022-01-31 23:22:35,438 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d517c70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 11:22:35, skipping insertion in model container [2022-01-31 23:22:35,438 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:22:35" (2/3) ... [2022-01-31 23:22:35,439 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d517c70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 11:22:35, skipping insertion in model container [2022-01-31 23:22:35,439 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 11:22:35" (3/3) ... [2022-01-31 23:22:35,440 INFO L111 eAbstractionObserver]: Analyzing ICFG trex04.c [2022-01-31 23:22:35,449 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-01-31 23:22:35,449 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 23:22:35,514 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 23:22:35,520 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 [2022-01-31 23:22:35,520 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 23:22:35,530 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 20 states have (on average 1.55) internal successors, (31), 24 states have internal predecessors, (31), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-31 23:22:35,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-31 23:22:35,549 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:22:35,550 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:22:35,550 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:22:35,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:22:35,554 INFO L85 PathProgramCache]: Analyzing trace with hash -1661240883, now seen corresponding path program 1 times [2022-01-31 23:22:35,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:22:35,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1768128971] [2022-01-31 23:22:35,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:22:35,583 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:22:35,629 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:22:35,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:35,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:22:35,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:35,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:22:35,791 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:22:35,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1768128971] [2022-01-31 23:22:35,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1768128971] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:22:35,793 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:22:35,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 23:22:35,794 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472477048] [2022-01-31 23:22:35,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:22:35,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 23:22:35,797 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:22:35,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 23:22:35,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 23:22:35,828 INFO L87 Difference]: Start difference. First operand has 31 states, 20 states have (on average 1.55) internal successors, (31), 24 states have internal predecessors, (31), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 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) [2022-01-31 23:22:35,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:22:35,891 INFO L93 Difference]: Finished difference Result 42 states and 53 transitions. [2022-01-31 23:22:35,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 23:22:35,896 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 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 17 [2022-01-31 23:22:35,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:22:35,905 INFO L225 Difference]: With dead ends: 42 [2022-01-31 23:22:35,905 INFO L226 Difference]: Without dead ends: 25 [2022-01-31 23:22:35,908 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 23:22:35,913 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 26 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 23:22:35,915 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 39 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 23:22:35,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-01-31 23:22:35,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-01-31 23:22:35,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 17 states have (on average 1.411764705882353) internal successors, (24), 19 states have internal predecessors, (24), 5 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 23:22:35,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2022-01-31 23:22:35,961 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 17 [2022-01-31 23:22:35,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:22:35,961 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2022-01-31 23:22:35,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 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) [2022-01-31 23:22:35,962 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2022-01-31 23:22:35,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-31 23:22:35,963 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:22:35,964 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:22:35,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 23:22:35,964 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:22:35,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:22:35,966 INFO L85 PathProgramCache]: Analyzing trace with hash -1664934967, now seen corresponding path program 1 times [2022-01-31 23:22:35,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:22:35,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [237896862] [2022-01-31 23:22:35,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:22:35,970 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:22:35,973 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:22:36,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:36,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:22:36,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:36,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:22:36,099 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:22:36,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [237896862] [2022-01-31 23:22:36,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [237896862] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:22:36,100 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:22:36,100 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 23:22:36,100 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131195277] [2022-01-31 23:22:36,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:22:36,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 23:22:36,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:22:36,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 23:22:36,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-31 23:22:36,103 INFO L87 Difference]: Start difference. First operand 25 states and 32 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 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) [2022-01-31 23:22:36,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:22:36,226 INFO L93 Difference]: Finished difference Result 25 states and 32 transitions. [2022-01-31 23:22:36,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 23:22:36,226 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 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 17 [2022-01-31 23:22:36,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:22:36,227 INFO L225 Difference]: With dead ends: 25 [2022-01-31 23:22:36,227 INFO L226 Difference]: Without dead ends: 0 [2022-01-31 23:22:36,232 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-01-31 23:22:36,234 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 21 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 23:22:36,234 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 44 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 23:22:36,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-01-31 23:22:36,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-01-31 23:22:36,236 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) [2022-01-31 23:22:36,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-01-31 23:22:36,236 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 17 [2022-01-31 23:22:36,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:22:36,237 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-01-31 23:22:36,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 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) [2022-01-31 23:22:36,238 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-01-31 23:22:36,238 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-01-31 23:22:36,240 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-01-31 23:22:36,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 23:22:36,243 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-01-31 23:22:36,307 INFO L858 garLoopResultBuilder]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2022-01-31 23:22:36,307 INFO L858 garLoopResultBuilder]: For program point reach_errorENTRY(line 3) no Hoare annotation was computed. [2022-01-31 23:22:36,309 INFO L858 garLoopResultBuilder]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2022-01-31 23:22:36,310 INFO L861 garLoopResultBuilder]: At program point fooEXIT(lines 18 25) the Hoare annotation is: true [2022-01-31 23:22:36,315 INFO L861 garLoopResultBuilder]: At program point L22(line 22) the Hoare annotation is: true [2022-01-31 23:22:36,315 INFO L861 garLoopResultBuilder]: At program point L23-1(lines 18 25) the Hoare annotation is: true [2022-01-31 23:22:36,315 INFO L861 garLoopResultBuilder]: At program point fooENTRY(lines 18 25) the Hoare annotation is: true [2022-01-31 23:22:36,315 INFO L861 garLoopResultBuilder]: At program point L22-2(lines 19 25) the Hoare annotation is: true [2022-01-31 23:22:36,315 INFO L858 garLoopResultBuilder]: For program point assume_abort_if_notENTRY(lines 5 7) no Hoare annotation was computed. [2022-01-31 23:22:36,315 INFO L858 garLoopResultBuilder]: For program point L6(line 6) no Hoare annotation was computed. [2022-01-31 23:22:36,315 INFO L858 garLoopResultBuilder]: For program point L6-2(lines 5 7) no Hoare annotation was computed. [2022-01-31 23:22:36,315 INFO L858 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 5 7) no Hoare annotation was computed. [2022-01-31 23:22:36,316 INFO L861 garLoopResultBuilder]: At program point L35-2(line 35) the Hoare annotation is: true [2022-01-31 23:22:36,316 INFO L861 garLoopResultBuilder]: At program point L31(line 31) the Hoare annotation is: true [2022-01-31 23:22:36,316 INFO L861 garLoopResultBuilder]: At program point mainEXIT(lines 27 48) the Hoare annotation is: true [2022-01-31 23:22:36,316 INFO L861 garLoopResultBuilder]: At program point mainFINAL(lines 27 48) the Hoare annotation is: true [2022-01-31 23:22:36,317 INFO L861 garLoopResultBuilder]: At program point L42-1(lines 28 48) the Hoare annotation is: true [2022-01-31 23:22:36,317 INFO L854 garLoopResultBuilder]: At program point L42-2(lines 42 45) the Hoare annotation is: (<= main_~x~0 0) [2022-01-31 23:22:36,317 INFO L861 garLoopResultBuilder]: At program point L34(line 34) the Hoare annotation is: true [2022-01-31 23:22:36,317 INFO L861 garLoopResultBuilder]: At program point L34-2(lines 28 48) the Hoare annotation is: true [2022-01-31 23:22:36,318 INFO L861 garLoopResultBuilder]: At program point mainENTRY(lines 27 48) the Hoare annotation is: true [2022-01-31 23:22:36,318 INFO L861 garLoopResultBuilder]: At program point L39(line 39) the Hoare annotation is: true [2022-01-31 23:22:36,318 INFO L861 garLoopResultBuilder]: At program point L39-1(line 39) the Hoare annotation is: true [2022-01-31 23:22:36,318 INFO L861 garLoopResultBuilder]: At program point L39-3(lines 28 48) the Hoare annotation is: true [2022-01-31 23:22:36,318 INFO L861 garLoopResultBuilder]: At program point L35(line 35) the Hoare annotation is: true [2022-01-31 23:22:36,318 INFO L861 garLoopResultBuilder]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2022-01-31 23:22:36,320 INFO L854 garLoopResultBuilder]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|)) [2022-01-31 23:22:36,320 INFO L861 garLoopResultBuilder]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2022-01-31 23:22:36,322 INFO L861 garLoopResultBuilder]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2022-01-31 23:22:36,323 INFO L861 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-01-31 23:22:36,323 INFO L861 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-01-31 23:22:36,323 INFO L861 garLoopResultBuilder]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2022-01-31 23:22:36,323 INFO L861 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 9 14) the Hoare annotation is: true [2022-01-31 23:22:36,323 INFO L854 garLoopResultBuilder]: At program point L11(line 11) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2022-01-31 23:22:36,323 INFO L854 garLoopResultBuilder]: At program point L10(lines 10 12) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2022-01-31 23:22:36,323 INFO L861 garLoopResultBuilder]: At program point __VERIFIER_assertEXIT(lines 9 14) the Hoare annotation is: true [2022-01-31 23:22:36,323 INFO L861 garLoopResultBuilder]: At program point L10-2(lines 9 14) the Hoare annotation is: true [2022-01-31 23:22:36,324 INFO L854 garLoopResultBuilder]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 11) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2022-01-31 23:22:36,327 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1] [2022-01-31 23:22:36,328 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-01-31 23:22:36,339 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 11:22:36 BoogieIcfgContainer [2022-01-31 23:22:36,339 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-31 23:22:36,340 INFO L158 Benchmark]: Toolchain (without parser) took 1480.34ms. Allocated memory is still 177.2MB. Free memory was 127.8MB in the beginning and 101.7MB in the end (delta: 26.1MB). Peak memory consumption was 26.6MB. Max. memory is 8.0GB. [2022-01-31 23:22:36,344 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 177.2MB. Free memory is still 144.1MB. There was no memory consumed. Max. memory is 8.0GB. [2022-01-31 23:22:36,345 INFO L158 Benchmark]: CACSL2BoogieTranslator took 214.06ms. Allocated memory is still 177.2MB. Free memory was 127.6MB in the beginning and 154.1MB in the end (delta: -26.5MB). Peak memory consumption was 8.8MB. Max. memory is 8.0GB. [2022-01-31 23:22:36,345 INFO L158 Benchmark]: Boogie Preprocessor took 29.41ms. Allocated memory is still 177.2MB. Free memory was 154.1MB in the beginning and 152.6MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-01-31 23:22:36,346 INFO L158 Benchmark]: RCFGBuilder took 297.44ms. Allocated memory is still 177.2MB. Free memory was 152.6MB in the beginning and 141.6MB in the end (delta: 11.0MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-01-31 23:22:36,346 INFO L158 Benchmark]: TraceAbstraction took 933.77ms. Allocated memory is still 177.2MB. Free memory was 141.1MB in the beginning and 101.7MB in the end (delta: 39.3MB). Peak memory consumption was 39.8MB. Max. memory is 8.0GB. [2022-01-31 23:22:36,348 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 177.2MB. Free memory is still 144.1MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 214.06ms. Allocated memory is still 177.2MB. Free memory was 127.6MB in the beginning and 154.1MB in the end (delta: -26.5MB). Peak memory consumption was 8.8MB. Max. memory is 8.0GB. * Boogie Preprocessor took 29.41ms. Allocated memory is still 177.2MB. Free memory was 154.1MB in the beginning and 152.6MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 297.44ms. Allocated memory is still 177.2MB. Free memory was 152.6MB in the beginning and 141.6MB in the end (delta: 11.0MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * TraceAbstraction took 933.77ms. Allocated memory is still 177.2MB. Free memory was 141.1MB in the beginning and 101.7MB in the end (delta: 39.3MB). Peak memory consumption was 39.8MB. 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: 11]: 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 7 procedures, 38 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.8s, OverallIterations: 2, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 52 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 47 mSDsluCounter, 83 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 20 mSDsCounter, 8 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 80 IncrementalHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 8 mSolverCounterUnsat, 63 mSDtfsCounter, 80 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=31occurred in iteration=0, InterpolantAutomatonStates: 9, 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, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 31 LocationsWithAnnotation, 42 PreInvPairs, 49 NumberOfFragments, 50 HoareAnnotationTreeSize, 42 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 31 FomulaSimplificationsInter, 5 FormulaSimplificationTreeSizeReductionInter, 0.0s 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 - ProcedureContractResult [Line: 18]: Procedure Contract for foo Derived contract for procedure foo: 1 - ProcedureContractResult [Line: 27]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 9]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: 1 RESULT: Ultimate proved your program to be correct! [2022-01-31 23:22:36,382 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...