/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-6c470ae [2022-02-15 03:38:59,226 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-15 03:38:59,251 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-15 03:38:59,278 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-15 03:38:59,308 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-15 03:38:59,308 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-15 03:38:59,309 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-15 03:38:59,313 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-02-15 03:38:59,323 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-15 03:38:59,323 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-15 03:38:59,324 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-15 03:38:59,324 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-15 03:38:59,324 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-15 03:38:59,325 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-15 03:38:59,325 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-15 03:38:59,325 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-15 03:38:59,325 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-15 03:38:59,325 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-15 03:38:59,326 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-15 03:38:59,326 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-15 03:38:59,326 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-15 03:38:59,326 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-15 03:38:59,326 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-15 03:38:59,326 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-15 03:38:59,326 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-15 03:38:59,326 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-02-15 03:38:59,326 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-15 03:38:59,327 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-02-15 03:38:59,327 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-15 03:38:59,525 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-15 03:38:59,549 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-15 03:38:59,553 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-15 03:38:59,553 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-15 03:38:59,554 INFO L275 PluginConnector]: CDTParser initialized [2022-02-15 03:38:59,555 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/trex04.c [2022-02-15 03:38:59,591 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/24d156f42/df63adccc2374e4395a94b4d9a05c481/FLAG8af3c75e0 [2022-02-15 03:38:59,952 INFO L306 CDTParser]: Found 1 translation units. [2022-02-15 03:38:59,952 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/trex04.c [2022-02-15 03:38:59,956 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/24d156f42/df63adccc2374e4395a94b4d9a05c481/FLAG8af3c75e0 [2022-02-15 03:38:59,965 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/24d156f42/df63adccc2374e4395a94b4d9a05c481 [2022-02-15 03:38:59,966 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-15 03:38:59,967 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-15 03:38:59,970 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-15 03:38:59,971 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-15 03:38:59,973 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-15 03:38:59,973 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 03:38:59" (1/1) ... [2022-02-15 03:38:59,974 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51de0cee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 03:38:59, skipping insertion in model container [2022-02-15 03:38:59,974 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 03:38:59" (1/1) ... [2022-02-15 03:38:59,984 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-15 03:38:59,997 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-15 03:39:00,109 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] [2022-02-15 03:39:00,122 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-15 03:39:00,127 INFO L203 MainTranslator]: Completed pre-run [2022-02-15 03:39:00,134 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] [2022-02-15 03:39:00,137 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-15 03:39:00,145 INFO L208 MainTranslator]: Completed translation [2022-02-15 03:39:00,146 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 03:39:00 WrapperNode [2022-02-15 03:39:00,146 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-15 03:39:00,146 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-15 03:39:00,147 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-15 03:39:00,147 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-15 03:39:00,153 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 03:39:00" (1/1) ... [2022-02-15 03:39:00,153 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 03:39:00" (1/1) ... [2022-02-15 03:39:00,157 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 03:39:00" (1/1) ... [2022-02-15 03:39:00,157 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 03:39:00" (1/1) ... [2022-02-15 03:39:00,160 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 03:39:00" (1/1) ... [2022-02-15 03:39:00,162 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 03:39:00" (1/1) ... [2022-02-15 03:39:00,166 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 03:39:00" (1/1) ... [2022-02-15 03:39:00,171 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-15 03:39:00,172 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-15 03:39:00,172 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-15 03:39:00,172 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-15 03:39:00,172 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 03:39:00" (1/1) ... [2022-02-15 03:39:00,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-15 03:39:00,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 03:39:00,216 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-02-15 03:39:00,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-02-15 03:39:00,287 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-15 03:39:00,287 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-15 03:39:00,287 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-15 03:39:00,287 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-02-15 03:39:00,287 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-15 03:39:00,287 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2022-02-15 03:39:00,287 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-15 03:39:00,288 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-15 03:39:00,288 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-15 03:39:00,288 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-15 03:39:00,288 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-15 03:39:00,289 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-02-15 03:39:00,289 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-15 03:39:00,290 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2022-02-15 03:39:00,290 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-02-15 03:39:00,290 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2022-02-15 03:39:00,290 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-15 03:39:00,291 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-15 03:39:00,292 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-15 03:39:00,292 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-15 03:39:00,292 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-15 03:39:00,292 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-15 03:39:00,293 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-15 03:39:00,338 INFO L234 CfgBuilder]: Building ICFG [2022-02-15 03:39:00,339 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-15 03:39:00,468 INFO L275 CfgBuilder]: Performing block encoding [2022-02-15 03:39:00,475 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-15 03:39:00,475 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-02-15 03:39:00,476 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 03:39:00 BoogieIcfgContainer [2022-02-15 03:39:00,476 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-15 03:39:00,477 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-15 03:39:00,477 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-15 03:39:00,484 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-15 03:39:00,484 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 03:38:59" (1/3) ... [2022-02-15 03:39:00,485 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42335bb8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 03:39:00, skipping insertion in model container [2022-02-15 03:39:00,485 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 03:39:00" (2/3) ... [2022-02-15 03:39:00,485 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42335bb8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 03:39:00, skipping insertion in model container [2022-02-15 03:39:00,485 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 03:39:00" (3/3) ... [2022-02-15 03:39:00,486 INFO L111 eAbstractionObserver]: Analyzing ICFG trex04.c [2022-02-15 03:39:00,489 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-02-15 03:39:00,489 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-15 03:39:00,520 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-15 03:39:00,525 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=AcceleratedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=QVASR [2022-02-15 03:39:00,525 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-15 03:39:00,534 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) [2022-02-15 03:39:00,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-15 03:39:00,539 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:39:00,539 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:39:00,540 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:39:00,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:39:00,543 INFO L85 PathProgramCache]: Analyzing trace with hash -1661240883, now seen corresponding path program 1 times [2022-02-15 03:39:00,548 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:39:00,549 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1239471178] [2022-02-15 03:39:00,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:39:00,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:39:00,587 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:39:00,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:00,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:39:00,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:00,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:39:00,708 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:39:00,708 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1239471178] [2022-02-15 03:39:00,709 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1239471178] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:39:00,709 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:39:00,709 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-15 03:39:00,710 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072054527] [2022-02-15 03:39:00,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:39:00,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-15 03:39:00,715 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:39:00,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-15 03:39:00,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-15 03:39:00,738 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) [2022-02-15 03:39:00,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:39:00,793 INFO L93 Difference]: Finished difference Result 42 states and 53 transitions. [2022-02-15 03:39:00,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-15 03:39:00,797 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 [2022-02-15 03:39:00,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:39:00,807 INFO L225 Difference]: With dead ends: 42 [2022-02-15 03:39:00,807 INFO L226 Difference]: Without dead ends: 25 [2022-02-15 03:39:00,810 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 [2022-02-15 03:39:00,813 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 [2022-02-15 03:39:00,814 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] [2022-02-15 03:39:00,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-02-15 03:39:00,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-02-15 03:39:00,849 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) [2022-02-15 03:39:00,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2022-02-15 03:39:00,852 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 17 [2022-02-15 03:39:00,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:39:00,853 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2022-02-15 03:39:00,853 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) [2022-02-15 03:39:00,853 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2022-02-15 03:39:00,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-15 03:39:00,855 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:39:00,855 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:39:00,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-15 03:39:00,856 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:39:00,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:39:00,858 INFO L85 PathProgramCache]: Analyzing trace with hash -1664934967, now seen corresponding path program 1 times [2022-02-15 03:39:00,858 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:39:00,859 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2129809594] [2022-02-15 03:39:00,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:39:00,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:39:00,864 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:39:00,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:00,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:39:00,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:00,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:39:00,981 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:39:00,981 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2129809594] [2022-02-15 03:39:00,982 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2129809594] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:39:00,982 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:39:00,982 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-15 03:39:00,982 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786073276] [2022-02-15 03:39:00,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:39:00,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-15 03:39:00,984 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:39:00,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-15 03:39:00,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-02-15 03:39:00,984 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) [2022-02-15 03:39:01,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:39:01,088 INFO L93 Difference]: Finished difference Result 25 states and 32 transitions. [2022-02-15 03:39:01,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-15 03:39:01,088 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 [2022-02-15 03:39:01,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:39:01,089 INFO L225 Difference]: With dead ends: 25 [2022-02-15 03:39:01,089 INFO L226 Difference]: Without dead ends: 0 [2022-02-15 03:39:01,093 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 [2022-02-15 03:39:01,094 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 [2022-02-15 03:39:01,094 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] [2022-02-15 03:39:01,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-02-15 03:39:01,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-02-15 03:39:01,097 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) [2022-02-15 03:39:01,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-02-15 03:39:01,098 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 17 [2022-02-15 03:39:01,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:39:01,098 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-02-15 03:39:01,099 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) [2022-02-15 03:39:01,099 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-02-15 03:39:01,099 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-02-15 03:39:01,101 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-02-15 03:39:01,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-15 03:39:01,104 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-02-15 03:39:01,161 INFO L858 garLoopResultBuilder]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2022-02-15 03:39:01,162 INFO L858 garLoopResultBuilder]: For program point reach_errorENTRY(line 3) no Hoare annotation was computed. [2022-02-15 03:39:01,164 INFO L858 garLoopResultBuilder]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2022-02-15 03:39:01,165 INFO L861 garLoopResultBuilder]: At program point fooEXIT(lines 18 25) the Hoare annotation is: true [2022-02-15 03:39:01,167 INFO L861 garLoopResultBuilder]: At program point L22(line 22) the Hoare annotation is: true [2022-02-15 03:39:01,167 INFO L861 garLoopResultBuilder]: At program point L23-1(lines 18 25) the Hoare annotation is: true [2022-02-15 03:39:01,167 INFO L861 garLoopResultBuilder]: At program point fooENTRY(lines 18 25) the Hoare annotation is: true [2022-02-15 03:39:01,167 INFO L861 garLoopResultBuilder]: At program point L22-2(lines 19 25) the Hoare annotation is: true [2022-02-15 03:39:01,167 INFO L858 garLoopResultBuilder]: For program point assume_abort_if_notENTRY(lines 5 7) no Hoare annotation was computed. [2022-02-15 03:39:01,167 INFO L858 garLoopResultBuilder]: For program point L6(line 6) no Hoare annotation was computed. [2022-02-15 03:39:01,168 INFO L858 garLoopResultBuilder]: For program point L6-2(lines 5 7) no Hoare annotation was computed. [2022-02-15 03:39:01,168 INFO L858 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 5 7) no Hoare annotation was computed. [2022-02-15 03:39:01,168 INFO L861 garLoopResultBuilder]: At program point L35-2(line 35) the Hoare annotation is: true [2022-02-15 03:39:01,168 INFO L861 garLoopResultBuilder]: At program point L31(line 31) the Hoare annotation is: true [2022-02-15 03:39:01,168 INFO L861 garLoopResultBuilder]: At program point mainEXIT(lines 27 48) the Hoare annotation is: true [2022-02-15 03:39:01,168 INFO L861 garLoopResultBuilder]: At program point mainFINAL(lines 27 48) the Hoare annotation is: true [2022-02-15 03:39:01,168 INFO L861 garLoopResultBuilder]: At program point L42-1(lines 28 48) the Hoare annotation is: true [2022-02-15 03:39:01,168 INFO L854 garLoopResultBuilder]: At program point L42-2(lines 42 45) the Hoare annotation is: (<= main_~x~0 0) [2022-02-15 03:39:01,168 INFO L861 garLoopResultBuilder]: At program point L34(line 34) the Hoare annotation is: true [2022-02-15 03:39:01,168 INFO L861 garLoopResultBuilder]: At program point L34-2(lines 28 48) the Hoare annotation is: true [2022-02-15 03:39:01,169 INFO L861 garLoopResultBuilder]: At program point mainENTRY(lines 27 48) the Hoare annotation is: true [2022-02-15 03:39:01,169 INFO L861 garLoopResultBuilder]: At program point L39(line 39) the Hoare annotation is: true [2022-02-15 03:39:01,169 INFO L861 garLoopResultBuilder]: At program point L39-1(line 39) the Hoare annotation is: true [2022-02-15 03:39:01,169 INFO L861 garLoopResultBuilder]: At program point L39-3(lines 28 48) the Hoare annotation is: true [2022-02-15 03:39:01,169 INFO L861 garLoopResultBuilder]: At program point L35(line 35) the Hoare annotation is: true [2022-02-15 03:39:01,169 INFO L861 garLoopResultBuilder]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2022-02-15 03:39:01,169 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|)) [2022-02-15 03:39:01,169 INFO L861 garLoopResultBuilder]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2022-02-15 03:39:01,169 INFO L861 garLoopResultBuilder]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2022-02-15 03:39:01,169 INFO L861 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-02-15 03:39:01,169 INFO L861 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-02-15 03:39:01,170 INFO L861 garLoopResultBuilder]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2022-02-15 03:39:01,170 INFO L861 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 9 14) the Hoare annotation is: true [2022-02-15 03:39:01,170 INFO L854 garLoopResultBuilder]: At program point L11(line 11) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2022-02-15 03:39:01,170 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))) [2022-02-15 03:39:01,170 INFO L861 garLoopResultBuilder]: At program point __VERIFIER_assertEXIT(lines 9 14) the Hoare annotation is: true [2022-02-15 03:39:01,170 INFO L861 garLoopResultBuilder]: At program point L10-2(lines 9 14) the Hoare annotation is: true [2022-02-15 03:39:01,170 INFO L854 garLoopResultBuilder]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 11) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2022-02-15 03:39:01,177 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1] [2022-02-15 03:39:01,178 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-02-15 03:39:01,188 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.02 03:39:01 BoogieIcfgContainer [2022-02-15 03:39:01,188 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-15 03:39:01,188 INFO L158 Benchmark]: Toolchain (without parser) took 1220.97ms. Allocated memory is still 203.4MB. Free memory was 155.1MB in the beginning and 125.8MB in the end (delta: 29.3MB). Peak memory consumption was 29.9MB. Max. memory is 8.0GB. [2022-02-15 03:39:01,190 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 203.4MB. Free memory is still 171.1MB. There was no memory consumed. Max. memory is 8.0GB. [2022-02-15 03:39:01,190 INFO L158 Benchmark]: CACSL2BoogieTranslator took 175.52ms. Allocated memory is still 203.4MB. Free memory was 154.8MB in the beginning and 179.1MB in the end (delta: -24.3MB). Peak memory consumption was 13.1MB. Max. memory is 8.0GB. [2022-02-15 03:39:01,190 INFO L158 Benchmark]: Boogie Preprocessor took 24.67ms. Allocated memory is still 203.4MB. Free memory was 179.1MB in the beginning and 177.6MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-02-15 03:39:01,190 INFO L158 Benchmark]: RCFGBuilder took 304.61ms. Allocated memory is still 203.4MB. Free memory was 177.6MB in the beginning and 166.6MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-02-15 03:39:01,191 INFO L158 Benchmark]: TraceAbstraction took 710.73ms. Allocated memory is still 203.4MB. Free memory was 166.4MB in the beginning and 125.8MB in the end (delta: 40.7MB). Peak memory consumption was 40.9MB. Max. memory is 8.0GB. [2022-02-15 03:39:01,192 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 203.4MB. Free memory is still 171.1MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 175.52ms. Allocated memory is still 203.4MB. Free memory was 154.8MB in the beginning and 179.1MB in the end (delta: -24.3MB). Peak memory consumption was 13.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 24.67ms. Allocated memory is still 203.4MB. Free memory was 179.1MB in the beginning and 177.6MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 304.61ms. Allocated memory is still 203.4MB. Free memory was 177.6MB in the beginning and 166.6MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * TraceAbstraction took 710.73ms. Allocated memory is still 203.4MB. Free memory was 166.4MB in the beginning and 125.8MB in the end (delta: 40.7MB). Peak memory consumption was 40.9MB. 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: 0.7s, OverallIterations: 2, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.2s, 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! [2022-02-15 03:39:01,228 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...