/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/terminator_03-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 19:32:31,541 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 19:32:31,543 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 19:32:31,568 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-04-06 19:32:31,569 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-04-06 19:32:31,569 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-04-06 19:32:31,570 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-04-06 19:32:31,571 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-04-06 19:32:31,572 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-04-06 19:32:31,573 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-04-06 19:32:31,574 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-04-06 19:32:31,574 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-04-06 19:32:31,574 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-06 19:32:31,575 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-06 19:32:31,576 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-06 19:32:31,576 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-06 19:32:31,577 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-06 19:32:31,577 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-06 19:32:31,578 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-06 19:32:31,579 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-06 19:32:31,583 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-06 19:32:31,584 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-06 19:32:31,585 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-06 19:32:31,587 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-06 19:32:31,587 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-06 19:32:31,589 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-04-06 19:32:31,589 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-04-06 19:32:31,589 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-04-06 19:32:31,589 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-04-06 19:32:31,590 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-04-06 19:32:31,590 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-04-06 19:32:31,590 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-04-06 19:32:31,591 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-04-06 19:32:31,591 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-04-06 19:32:31,592 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-04-06 19:32:31,592 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-04-06 19:32:31,592 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-04-06 19:32:31,593 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-04-06 19:32:31,593 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-04-06 19:32:31,593 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 19:32:31,593 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 19:32:31,600 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 19:32:31,600 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-04-06 19:32:31,609 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 19:32:31,609 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 19:32:31,610 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 19:32:31,610 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 19:32:31,610 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 19:32:31,610 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 19:32:31,610 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 19:32:31,610 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 19:32:31,610 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 19:32:31,611 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 19:32:31,611 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 19:32:31,611 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 19:32:31,611 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 19:32:31,612 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 19:32:31,612 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 19:32:31,612 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 19:32:31,612 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 19:32:31,612 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-06 19:32:31,612 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-06 19:32:31,612 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-06 19:32:31,612 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 19:32:31,612 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-04-06 19:32:31,612 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 19:32:31,782 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 19:32:31,796 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 19:32:31,797 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 19:32:31,798 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 19:32:31,798 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 19:32:31,799 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/terminator_03-2.i [2022-04-06 19:32:31,842 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/517df7230/1b91829ecabf422bb9dcb5b472bcf611/FLAG1d3307b2e [2022-04-06 19:32:32,215 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 19:32:32,216 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/terminator_03-2.i [2022-04-06 19:32:32,220 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/517df7230/1b91829ecabf422bb9dcb5b472bcf611/FLAG1d3307b2e [2022-04-06 19:32:32,236 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/517df7230/1b91829ecabf422bb9dcb5b472bcf611 [2022-04-06 19:32:32,239 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 19:32:32,241 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-06 19:32:32,243 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 19:32:32,243 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 19:32:32,246 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 19:32:32,246 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 07:32:32" (1/1) ... [2022-04-06 19:32:32,247 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66612c0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:32:32, skipping insertion in model container [2022-04-06 19:32:32,247 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 07:32:32" (1/1) ... [2022-04-06 19:32:32,252 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 19:32:32,265 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 19:32:32,401 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/terminator_03-2.i[902,915] [2022-04-06 19:32:32,410 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 19:32:32,415 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 19:32:32,423 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/terminator_03-2.i[902,915] [2022-04-06 19:32:32,427 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 19:32:32,436 INFO L208 MainTranslator]: Completed translation [2022-04-06 19:32:32,436 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:32:32 WrapperNode [2022-04-06 19:32:32,436 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 19:32:32,437 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 19:32:32,437 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 19:32:32,437 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 19:32:32,444 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:32:32" (1/1) ... [2022-04-06 19:32:32,444 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:32:32" (1/1) ... [2022-04-06 19:32:32,448 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:32:32" (1/1) ... [2022-04-06 19:32:32,448 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:32:32" (1/1) ... [2022-04-06 19:32:32,451 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:32:32" (1/1) ... [2022-04-06 19:32:32,454 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:32:32" (1/1) ... [2022-04-06 19:32:32,455 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:32:32" (1/1) ... [2022-04-06 19:32:32,456 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 19:32:32,456 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 19:32:32,456 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 19:32:32,456 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 19:32:32,457 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:32:32" (1/1) ... [2022-04-06 19:32:32,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 19:32:32,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:32:32,480 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) [2022-04-06 19:32:32,483 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 [2022-04-06 19:32:32,527 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 19:32:32,527 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 19:32:32,527 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 19:32:32,527 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-06 19:32:32,528 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 19:32:32,528 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 19:32:32,528 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 19:32:32,528 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 19:32:32,528 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-04-06 19:32:32,528 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-04-06 19:32:32,529 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 19:32:32,529 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 19:32:32,530 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-06 19:32:32,530 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 19:32:32,530 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-06 19:32:32,531 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2022-04-06 19:32:32,531 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 19:32:32,531 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 19:32:32,531 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 19:32:32,531 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 19:32:32,532 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 19:32:32,532 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 19:32:32,532 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 19:32:32,587 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 19:32:32,588 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 19:32:32,660 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 19:32:32,663 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 19:32:32,663 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-04-06 19:32:32,665 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 07:32:32 BoogieIcfgContainer [2022-04-06 19:32:32,665 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 19:32:32,666 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 19:32:32,666 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 19:32:32,668 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 19:32:32,668 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 07:32:32" (1/3) ... [2022-04-06 19:32:32,669 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b8119ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 07:32:32, skipping insertion in model container [2022-04-06 19:32:32,669 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:32:32" (2/3) ... [2022-04-06 19:32:32,669 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b8119ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 07:32:32, skipping insertion in model container [2022-04-06 19:32:32,669 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 07:32:32" (3/3) ... [2022-04-06 19:32:32,670 INFO L111 eAbstractionObserver]: Analyzing ICFG terminator_03-2.i [2022-04-06 19:32:32,673 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-06 19:32:32,673 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 19:32:32,708 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 19:32:32,712 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-04-06 19:32:32,712 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 19:32:32,720 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 19:32:32,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-04-06 19:32:32,725 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:32:32,725 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:32:32,726 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:32:32,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:32:32,729 INFO L85 PathProgramCache]: Analyzing trace with hash 1574076283, now seen corresponding path program 1 times [2022-04-06 19:32:32,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:32:32,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [743671376] [2022-04-06 19:32:32,741 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 19:32:32,741 INFO L85 PathProgramCache]: Analyzing trace with hash 1574076283, now seen corresponding path program 2 times [2022-04-06 19:32:32,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:32:32,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956768867] [2022-04-06 19:32:32,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:32:32,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:32:32,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:32:32,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:32:32,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:32:32,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:32:32,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:32:33,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956768867] [2022-04-06 19:32:33,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956768867] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:32:33,001 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:32:33,001 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 19:32:33,004 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:32:33,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [743671376] [2022-04-06 19:32:33,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [743671376] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:32:33,006 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:32:33,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 19:32:33,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677987418] [2022-04-06 19:32:33,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:32:33,010 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 19:32:33,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:32:33,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 19:32:33,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-04-06 19:32:33,039 INFO L87 Difference]: Start difference. First operand has 21 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:32:33,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:32:33,160 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2022-04-06 19:32:33,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 19:32:33,162 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-04-06 19:32:33,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:32:33,167 INFO L225 Difference]: With dead ends: 33 [2022-04-06 19:32:33,167 INFO L226 Difference]: Without dead ends: 0 [2022-04-06 19:32:33,169 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-04-06 19:32:33,172 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 19 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:32:33,173 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 41 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 19:32:33,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-04-06 19:32:33,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-04-06 19:32:33,188 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) [2022-04-06 19:32:33,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-04-06 19:32:33,189 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 12 [2022-04-06 19:32:33,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:32:33,189 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-04-06 19:32:33,189 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:32:33,190 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-04-06 19:32:33,190 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-06 19:32:33,192 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-04-06 19:32:33,192 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 19:32:33,193 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-04-06 19:32:33,243 INFO L882 garLoopResultBuilder]: For program point reach_errorEXIT(line 12) no Hoare annotation was computed. [2022-04-06 19:32:33,243 INFO L882 garLoopResultBuilder]: For program point reach_errorENTRY(line 12) no Hoare annotation was computed. [2022-04-06 19:32:33,243 INFO L882 garLoopResultBuilder]: For program point L12-1(line 12) no Hoare annotation was computed. [2022-04-06 19:32:33,243 INFO L882 garLoopResultBuilder]: For program point L15(line 15) no Hoare annotation was computed. [2022-04-06 19:32:33,243 INFO L882 garLoopResultBuilder]: For program point assume_abort_if_notENTRY(lines 14 16) no Hoare annotation was computed. [2022-04-06 19:32:33,244 INFO L882 garLoopResultBuilder]: For program point L15-2(lines 14 16) no Hoare annotation was computed. [2022-04-06 19:32:33,244 INFO L882 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 14 16) no Hoare annotation was computed. [2022-04-06 19:32:33,244 INFO L885 garLoopResultBuilder]: At program point mainENTRY(lines 25 36) the Hoare annotation is: true [2022-04-06 19:32:33,244 INFO L885 garLoopResultBuilder]: At program point L29(lines 29 33) the Hoare annotation is: true [2022-04-06 19:32:33,244 INFO L885 garLoopResultBuilder]: At program point L28(line 28) the Hoare annotation is: true [2022-04-06 19:32:33,244 INFO L885 garLoopResultBuilder]: At program point L30-2(lines 30 32) the Hoare annotation is: true [2022-04-06 19:32:33,244 INFO L878 garLoopResultBuilder]: At program point L29-1(lines 29 33) the Hoare annotation is: (or (<= 100 main_~x~0) (<= main_~y~0 0)) [2022-04-06 19:32:33,244 INFO L885 garLoopResultBuilder]: At program point mainEXIT(lines 25 36) the Hoare annotation is: true [2022-04-06 19:32:33,244 INFO L885 garLoopResultBuilder]: At program point mainFINAL(lines 25 36) the Hoare annotation is: true [2022-04-06 19:32:33,245 INFO L878 garLoopResultBuilder]: At program point L34(line 34) the Hoare annotation is: (or (<= 100 main_~x~0) (<= main_~y~0 0)) [2022-04-06 19:32:33,245 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2022-04-06 19:32:33,245 INFO L878 garLoopResultBuilder]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|)) [2022-04-06 19:32:33,245 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2022-04-06 19:32:33,245 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2022-04-06 19:32:33,245 INFO L885 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-04-06 19:32:33,245 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-04-06 19:32:33,245 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2022-04-06 19:32:33,245 INFO L878 garLoopResultBuilder]: At program point L18-2(lines 17 22) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2022-04-06 19:32:33,245 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 17 22) the Hoare annotation is: true [2022-04-06 19:32:33,246 INFO L878 garLoopResultBuilder]: At program point __VERIFIER_assertEXIT(lines 17 22) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2022-04-06 19:32:33,246 INFO L878 garLoopResultBuilder]: At program point L19(line 19) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2022-04-06 19:32:33,246 INFO L878 garLoopResultBuilder]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 19) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2022-04-06 19:32:33,246 INFO L878 garLoopResultBuilder]: At program point L18(lines 18 20) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2022-04-06 19:32:33,248 INFO L719 BasicCegarLoop]: Path program histogram: [2] [2022-04-06 19:32:33,249 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-04-06 19:32:33,259 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.04 07:32:33 BoogieIcfgContainer [2022-04-06 19:32:33,260 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-04-06 19:32:33,260 INFO L158 Benchmark]: Toolchain (without parser) took 1019.53ms. Allocated memory was 179.3MB in the beginning and 216.0MB in the end (delta: 36.7MB). Free memory was 128.5MB in the beginning and 147.8MB in the end (delta: -19.3MB). Peak memory consumption was 17.5MB. Max. memory is 8.0GB. [2022-04-06 19:32:33,261 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 179.3MB. Free memory is still 144.7MB. There was no memory consumed. Max. memory is 8.0GB. [2022-04-06 19:32:33,261 INFO L158 Benchmark]: CACSL2BoogieTranslator took 193.95ms. Allocated memory was 179.3MB in the beginning and 216.0MB in the end (delta: 36.7MB). Free memory was 128.4MB in the beginning and 192.9MB in the end (delta: -64.5MB). Peak memory consumption was 11.2MB. Max. memory is 8.0GB. [2022-04-06 19:32:33,261 INFO L158 Benchmark]: Boogie Preprocessor took 18.74ms. Allocated memory is still 216.0MB. Free memory was 192.9MB in the beginning and 191.8MB in the end (delta: 1.1MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-04-06 19:32:33,261 INFO L158 Benchmark]: RCFGBuilder took 208.51ms. Allocated memory is still 216.0MB. Free memory was 191.7MB in the beginning and 181.4MB in the end (delta: 10.3MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-04-06 19:32:33,262 INFO L158 Benchmark]: TraceAbstraction took 593.95ms. Allocated memory is still 216.0MB. Free memory was 180.8MB in the beginning and 147.8MB in the end (delta: 32.9MB). Peak memory consumption was 32.5MB. Max. memory is 8.0GB. [2022-04-06 19:32:33,263 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 179.3MB. Free memory is still 144.7MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 193.95ms. Allocated memory was 179.3MB in the beginning and 216.0MB in the end (delta: 36.7MB). Free memory was 128.4MB in the beginning and 192.9MB in the end (delta: -64.5MB). Peak memory consumption was 11.2MB. Max. memory is 8.0GB. * Boogie Preprocessor took 18.74ms. Allocated memory is still 216.0MB. Free memory was 192.9MB in the beginning and 191.8MB in the end (delta: 1.1MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 208.51ms. Allocated memory is still 216.0MB. Free memory was 191.7MB in the beginning and 181.4MB in the end (delta: 10.3MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * TraceAbstraction took 593.95ms. Allocated memory is still 216.0MB. Free memory was 180.8MB in the beginning and 147.8MB in the end (delta: 32.9MB). Peak memory consumption was 32.5MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 19]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 28 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.5s, OverallIterations: 1, TraceHistogramMax: 1, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 19 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 19 mSDsluCounter, 41 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 21 mSDsCounter, 5 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 45 IncrementalHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 5 mSolverCounterUnsat, 20 mSDtfsCounter, 45 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=21occurred in iteration=0, InterpolantAutomatonStates: 6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 21 LocationsWithAnnotation, 27 PreInvPairs, 37 NumberOfFragments, 64 HoareAnnotationTreeSize, 27 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 21 FomulaSimplificationsInter, 15 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 - InvariantResult [Line: 30]: Loop Invariant Derived loop invariant: 1 - ProcedureContractResult [Line: 25]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 17]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: \old(cond) == 0 || !(cond == 0) RESULT: Ultimate proved your program to be correct! [2022-04-06 19:32:33,291 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...