/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/loop-zilu/benchmark26_linear.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05ce600 [2022-02-24 04:01:56,103 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-24 04:01:56,109 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-24 04:01:56,158 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-02-24 04:01:56,158 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-02-24 04:01:56,159 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-02-24 04:01:56,160 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-02-24 04:01:56,162 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-02-24 04:01:56,163 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-02-24 04:01:56,164 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-02-24 04:01:56,164 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-02-24 04:01:56,165 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-02-24 04:01:56,165 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-24 04:01:56,166 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-24 04:01:56,167 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-24 04:01:56,168 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-24 04:01:56,169 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-24 04:01:56,169 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-24 04:01:56,171 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-24 04:01:56,172 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-24 04:01:56,173 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-24 04:01:56,182 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-24 04:01:56,185 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-24 04:01:56,186 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-24 04:01:56,192 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-02-24 04:01:56,193 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-02-24 04:01:56,193 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-02-24 04:01:56,194 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-02-24 04:01:56,194 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-02-24 04:01:56,195 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-02-24 04:01:56,195 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-02-24 04:01:56,196 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-02-24 04:01:56,196 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-02-24 04:01:56,197 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-02-24 04:01:56,197 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-02-24 04:01:56,198 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-02-24 04:01:56,198 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-02-24 04:01:56,198 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-02-24 04:01:56,199 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-24 04:01:56,199 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-24 04:01:56,200 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-24 04:01:56,206 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-02-24 04:01:56,217 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-24 04:01:56,217 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-24 04:01:56,219 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-24 04:01:56,219 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-24 04:01:56,219 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-24 04:01:56,219 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-24 04:01:56,219 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-24 04:01:56,220 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-24 04:01:56,220 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-24 04:01:56,220 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-24 04:01:56,221 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-24 04:01:56,221 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-24 04:01:56,221 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-24 04:01:56,221 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-24 04:01:56,221 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-24 04:01:56,221 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-24 04:01:56,222 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-24 04:01:56,222 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-02-24 04:01:56,222 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-24 04:01:56,222 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-02-24 04:01:56,222 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-24 04:01:56,417 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-24 04:01:56,445 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-24 04:01:56,448 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-24 04:01:56,449 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-24 04:01:56,449 INFO L275 PluginConnector]: CDTParser initialized [2022-02-24 04:01:56,451 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-zilu/benchmark26_linear.i [2022-02-24 04:01:56,529 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45a904036/84a977bd5e4d4755929ed6bb9b827cba/FLAGac768d0eb [2022-02-24 04:01:56,893 INFO L306 CDTParser]: Found 1 translation units. [2022-02-24 04:01:56,893 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-zilu/benchmark26_linear.i [2022-02-24 04:01:56,901 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45a904036/84a977bd5e4d4755929ed6bb9b827cba/FLAGac768d0eb [2022-02-24 04:01:57,332 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45a904036/84a977bd5e4d4755929ed6bb9b827cba [2022-02-24 04:01:57,334 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-24 04:01:57,335 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-24 04:01:57,336 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-24 04:01:57,336 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-24 04:01:57,338 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-24 04:01:57,338 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 04:01:57" (1/1) ... [2022-02-24 04:01:57,339 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ed77645 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:01:57, skipping insertion in model container [2022-02-24 04:01:57,339 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 04:01:57" (1/1) ... [2022-02-24 04:01:57,344 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-24 04:01:57,354 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-24 04:01:57,505 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-zilu/benchmark26_linear.i[868,881] [2022-02-24 04:01:57,519 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-24 04:01:57,524 INFO L203 MainTranslator]: Completed pre-run [2022-02-24 04:01:57,535 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-zilu/benchmark26_linear.i[868,881] [2022-02-24 04:01:57,536 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-24 04:01:57,546 INFO L208 MainTranslator]: Completed translation [2022-02-24 04:01:57,546 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:01:57 WrapperNode [2022-02-24 04:01:57,546 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-24 04:01:57,547 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-24 04:01:57,547 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-24 04:01:57,547 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-24 04:01:57,554 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:01:57" (1/1) ... [2022-02-24 04:01:57,554 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:01:57" (1/1) ... [2022-02-24 04:01:57,558 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:01:57" (1/1) ... [2022-02-24 04:01:57,559 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:01:57" (1/1) ... [2022-02-24 04:01:57,561 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:01:57" (1/1) ... [2022-02-24 04:01:57,564 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:01:57" (1/1) ... [2022-02-24 04:01:57,565 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:01:57" (1/1) ... [2022-02-24 04:01:57,566 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-24 04:01:57,566 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-24 04:01:57,566 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-24 04:01:57,566 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-24 04:01:57,567 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:01:57" (1/1) ... [2022-02-24 04:01:57,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-24 04:01:57,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-24 04:01:57,614 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) [2022-02-24 04:01:57,625 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 [2022-02-24 04:01:57,647 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-24 04:01:57,647 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-24 04:01:57,647 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-24 04:01:57,648 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-24 04:01:57,648 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-24 04:01:57,648 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-24 04:01:57,648 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-02-24 04:01:57,648 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-02-24 04:01:57,649 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-24 04:01:57,649 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-24 04:01:57,649 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-02-24 04:01:57,649 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2022-02-24 04:01:57,649 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-24 04:01:57,649 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-24 04:01:57,650 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-24 04:01:57,650 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-24 04:01:57,650 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-24 04:01:57,650 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-24 04:01:57,652 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-24 04:01:57,652 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-24 04:01:57,705 INFO L234 CfgBuilder]: Building ICFG [2022-02-24 04:01:57,707 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-24 04:01:57,784 INFO L275 CfgBuilder]: Performing block encoding [2022-02-24 04:01:57,788 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-24 04:01:57,788 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-02-24 04:01:57,790 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 04:01:57 BoogieIcfgContainer [2022-02-24 04:01:57,790 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-24 04:01:57,791 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-24 04:01:57,794 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-24 04:01:57,801 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-24 04:01:57,801 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.02 04:01:57" (1/3) ... [2022-02-24 04:01:57,802 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bd465a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 04:01:57, skipping insertion in model container [2022-02-24 04:01:57,802 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:01:57" (2/3) ... [2022-02-24 04:01:57,802 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bd465a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 04:01:57, skipping insertion in model container [2022-02-24 04:01:57,802 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 04:01:57" (3/3) ... [2022-02-24 04:01:57,803 INFO L111 eAbstractionObserver]: Analyzing ICFG benchmark26_linear.i [2022-02-24 04:01:57,808 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-02-24 04:01:57,808 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-24 04:01:57,848 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-24 04:01:57,854 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 [2022-02-24 04:01:57,855 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-24 04:01:57,868 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 04:01:57,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-02-24 04:01:57,874 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:01:57,874 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:01:57,875 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:01:57,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:01:57,879 INFO L85 PathProgramCache]: Analyzing trace with hash -304977768, now seen corresponding path program 1 times [2022-02-24 04:01:57,893 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:01:57,894 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [562922873] [2022-02-24 04:01:57,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:01:57,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:01:57,938 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:01:57,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:01:58,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:01:58,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:01:58,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:01:58,030 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:01:58,030 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [562922873] [2022-02-24 04:01:58,031 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [562922873] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:01:58,032 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:01:58,032 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 04:01:58,033 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108706820] [2022-02-24 04:01:58,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:01:58,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 04:01:58,036 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:01:58,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 04:01:58,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 04:01:58,056 INFO L87 Difference]: Start difference. First operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 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) [2022-02-24 04:01:58,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:01:58,153 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2022-02-24 04:01:58,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 04:01:58,169 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 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 [2022-02-24 04:01:58,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:01:58,173 INFO L225 Difference]: With dead ends: 33 [2022-02-24 04:01:58,174 INFO L226 Difference]: Without dead ends: 14 [2022-02-24 04:01:58,176 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 04:01:58,178 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 12 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 04:01:58,179 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 28 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 04:01:58,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-02-24 04:01:58,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-02-24 04:01:58,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:01:58,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2022-02-24 04:01:58,220 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2022-02-24 04:01:58,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:01:58,220 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2022-02-24 04:01:58,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 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) [2022-02-24 04:01:58,221 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2022-02-24 04:01:58,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-02-24 04:01:58,221 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:01:58,221 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:01:58,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-24 04:01:58,222 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:01:58,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:01:58,222 INFO L85 PathProgramCache]: Analyzing trace with hash -828987386, now seen corresponding path program 1 times [2022-02-24 04:01:58,223 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:01:58,223 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1208637247] [2022-02-24 04:01:58,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:01:58,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:01:58,352 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:01:58,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:01:58,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:01:58,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:01:58,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:01:58,526 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:01:58,526 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1208637247] [2022-02-24 04:01:58,526 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1208637247] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:01:58,527 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:01:58,527 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-24 04:01:58,527 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510583076] [2022-02-24 04:01:58,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:01:58,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-24 04:01:58,528 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:01:58,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-24 04:01:58,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-02-24 04:01:58,529 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 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) [2022-02-24 04:01:58,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:01:58,602 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2022-02-24 04:01:58,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-24 04:01:58,603 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 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 13 [2022-02-24 04:01:58,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:01:58,604 INFO L225 Difference]: With dead ends: 20 [2022-02-24 04:01:58,604 INFO L226 Difference]: Without dead ends: 15 [2022-02-24 04:01:58,608 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2022-02-24 04:01:58,611 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 8 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 04:01:58,611 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 27 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 24 Invalid, 0 Unknown, 2 Unchecked, 0.0s Time] [2022-02-24 04:01:58,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-02-24 04:01:58,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-02-24 04:01:58,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:01:58,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2022-02-24 04:01:58,621 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2022-02-24 04:01:58,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:01:58,622 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2022-02-24 04:01:58,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 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) [2022-02-24 04:01:58,623 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2022-02-24 04:01:58,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-24 04:01:58,623 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:01:58,623 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:01:58,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-24 04:01:58,624 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:01:58,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:01:58,626 INFO L85 PathProgramCache]: Analyzing trace with hash 106583640, now seen corresponding path program 2 times [2022-02-24 04:01:58,627 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:01:58,627 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [811550365] [2022-02-24 04:01:58,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:01:58,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:01:58,693 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 04:01:58,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:01:58,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:01:58,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:01:58,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:01:58,812 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:01:58,812 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [811550365] [2022-02-24 04:01:58,812 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [811550365] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:01:58,812 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:01:58,812 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-24 04:01:58,813 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426256201] [2022-02-24 04:01:58,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:01:58,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-24 04:01:58,813 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:01:58,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-24 04:01:58,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-02-24 04:01:58,814 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 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) [2022-02-24 04:01:58,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:01:58,877 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2022-02-24 04:01:58,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-24 04:01:58,877 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 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 14 [2022-02-24 04:01:58,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:01:58,877 INFO L225 Difference]: With dead ends: 15 [2022-02-24 04:01:58,877 INFO L226 Difference]: Without dead ends: 0 [2022-02-24 04:01:58,878 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2022-02-24 04:01:58,883 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 5 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 5 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 04:01:58,884 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 30 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 14 Invalid, 0 Unknown, 5 Unchecked, 0.0s Time] [2022-02-24 04:01:58,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-02-24 04:01:58,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-02-24 04:01:58,885 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) [2022-02-24 04:01:58,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-02-24 04:01:58,885 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 14 [2022-02-24 04:01:58,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:01:58,885 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-02-24 04:01:58,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 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) [2022-02-24 04:01:58,885 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-02-24 04:01:58,885 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-02-24 04:01:58,887 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-02-24 04:01:58,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-24 04:01:58,889 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-02-24 04:01:58,957 INFO L858 garLoopResultBuilder]: For program point reach_errorEXIT(line 11) no Hoare annotation was computed. [2022-02-24 04:01:58,957 INFO L858 garLoopResultBuilder]: For program point reach_errorENTRY(line 11) no Hoare annotation was computed. [2022-02-24 04:01:58,957 INFO L858 garLoopResultBuilder]: For program point L11-1(line 11) no Hoare annotation was computed. [2022-02-24 04:01:58,957 INFO L861 garLoopResultBuilder]: At program point mainENTRY(lines 19 28) the Hoare annotation is: true [2022-02-24 04:01:58,957 INFO L861 garLoopResultBuilder]: At program point L26(line 26) the Hoare annotation is: true [2022-02-24 04:01:58,957 INFO L861 garLoopResultBuilder]: At program point mainEXIT(lines 19 28) the Hoare annotation is: true [2022-02-24 04:01:58,958 INFO L861 garLoopResultBuilder]: At program point L22(line 22) the Hoare annotation is: true [2022-02-24 04:01:58,958 INFO L854 garLoopResultBuilder]: At program point L23-2(lines 23 25) the Hoare annotation is: (< main_~x~0 (+ main_~y~0 1)) [2022-02-24 04:01:58,958 INFO L854 garLoopResultBuilder]: At program point L23-3(lines 23 25) the Hoare annotation is: (= (+ main_~y~0 (* (- 1) main_~x~0)) 0) [2022-02-24 04:01:58,958 INFO L861 garLoopResultBuilder]: At program point mainFINAL(lines 19 28) the Hoare annotation is: true [2022-02-24 04:01:58,959 INFO L861 garLoopResultBuilder]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2022-02-24 04:01:58,959 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|)) [2022-02-24 04:01:58,959 INFO L861 garLoopResultBuilder]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2022-02-24 04:01:58,959 INFO L861 garLoopResultBuilder]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2022-02-24 04:01:58,959 INFO L861 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-02-24 04:01:58,959 INFO L861 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-02-24 04:01:58,959 INFO L861 garLoopResultBuilder]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2022-02-24 04:01:58,960 INFO L854 garLoopResultBuilder]: At program point L16(line 16) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2022-02-24 04:01:58,960 INFO L854 garLoopResultBuilder]: At program point L15(lines 15 17) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2022-02-24 04:01:58,960 INFO L861 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 14 18) the Hoare annotation is: true [2022-02-24 04:01:58,960 INFO L861 garLoopResultBuilder]: At program point L15-2(lines 14 18) the Hoare annotation is: true [2022-02-24 04:01:58,960 INFO L861 garLoopResultBuilder]: At program point __VERIFIER_assertEXIT(lines 14 18) the Hoare annotation is: true [2022-02-24 04:01:58,960 INFO L854 garLoopResultBuilder]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 16) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2022-02-24 04:01:58,963 INFO L732 BasicCegarLoop]: Path program histogram: [2, 1] [2022-02-24 04:01:58,964 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-02-24 04:01:58,979 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.02 04:01:58 BoogieIcfgContainer [2022-02-24 04:01:58,979 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-24 04:01:58,981 INFO L158 Benchmark]: Toolchain (without parser) took 1644.85ms. Allocated memory was 189.8MB in the beginning and 228.6MB in the end (delta: 38.8MB). Free memory was 133.2MB in the beginning and 196.4MB in the end (delta: -63.2MB). Peak memory consumption was 45.0MB. Max. memory is 8.0GB. [2022-02-24 04:01:58,981 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 189.8MB. Free memory is still 149.2MB. There was no memory consumed. Max. memory is 8.0GB. [2022-02-24 04:01:58,982 INFO L158 Benchmark]: CACSL2BoogieTranslator took 210.61ms. Allocated memory was 189.8MB in the beginning and 228.6MB in the end (delta: 38.8MB). Free memory was 133.1MB in the beginning and 199.6MB in the end (delta: -66.5MB). Peak memory consumption was 12.9MB. Max. memory is 8.0GB. [2022-02-24 04:01:58,982 INFO L158 Benchmark]: Boogie Preprocessor took 18.81ms. Allocated memory is still 228.6MB. Free memory was 199.6MB in the beginning and 198.5MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-24 04:01:58,982 INFO L158 Benchmark]: RCFGBuilder took 223.54ms. Allocated memory is still 228.6MB. Free memory was 198.0MB in the beginning and 188.1MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-02-24 04:01:58,982 INFO L158 Benchmark]: TraceAbstraction took 1188.23ms. Allocated memory is still 228.6MB. Free memory was 187.5MB in the beginning and 196.4MB in the end (delta: -8.8MB). Peak memory consumption was 60.9MB. Max. memory is 8.0GB. [2022-02-24 04:01:58,984 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 189.8MB. Free memory is still 149.2MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 210.61ms. Allocated memory was 189.8MB in the beginning and 228.6MB in the end (delta: 38.8MB). Free memory was 133.1MB in the beginning and 199.6MB in the end (delta: -66.5MB). Peak memory consumption was 12.9MB. Max. memory is 8.0GB. * Boogie Preprocessor took 18.81ms. Allocated memory is still 228.6MB. Free memory was 199.6MB in the beginning and 198.5MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 223.54ms. Allocated memory is still 228.6MB. Free memory was 198.0MB in the beginning and 188.1MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * TraceAbstraction took 1188.23ms. Allocated memory is still 228.6MB. Free memory was 187.5MB in the beginning and 196.4MB in the end (delta: -8.8MB). Peak memory consumption was 60.9MB. 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: 16]: 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 5 procedures, 23 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 1.1s, OverallIterations: 3, TraceHistogramMax: 2, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 26 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 25 mSDsluCounter, 85 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 7 IncrementalHoareTripleChecker+Unchecked, 48 mSDsCounter, 13 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 56 IncrementalHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 13 mSolverCounterUnsat, 37 mSDtfsCounter, 56 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred in iteration=0, InterpolantAutomatonStates: 20, 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, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 20 LocationsWithAnnotation, 32 PreInvPairs, 43 NumberOfFragments, 47 HoareAnnotationTreeSize, 32 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 20 FomulaSimplificationsInter, 58 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: 23]: Loop Invariant Derived loop invariant: x < y + 1 - ProcedureContractResult [Line: 19]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 14]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: 1 RESULT: Ultimate proved your program to be correct! [2022-02-24 04:01:59,021 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...