/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/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/loops/sum01_bug02.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 20:40:08,985 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 20:40:08,987 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 20:40:09,055 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-31 20:40:09,068 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 20:40:09,070 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 20:40:09,071 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 20:40:09,073 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 20:40:09,074 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 20:40:09,074 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 20:40:09,075 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 20:40:09,079 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 20:40:09,080 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 20:40:09,081 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 20:40:09,082 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 20:40:09,083 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 20:40:09,087 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 20:40:09,093 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 20:40:09,094 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 20:40:09,094 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 20:40:09,095 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-01-31 20:40:09,103 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 20:40:09,103 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 20:40:09,104 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 20:40:09,104 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 20:40:09,104 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 20:40:09,104 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 20:40:09,105 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 20:40:09,105 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 20:40:09,105 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 20:40:09,105 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 20:40:09,105 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 20:40:09,106 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 20:40:09,106 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 20:40:09,106 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 20:40:09,106 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 20:40:09,106 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 20:40:09,106 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 20:40:09,106 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 20:40:09,106 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 20:40:09,106 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 20:40:09,106 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-01-31 20:40:09,106 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-31 20:40:09,106 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-01-31 20:40:09,107 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 20:40:09,335 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 20:40:09,362 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 20:40:09,364 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 20:40:09,365 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 20:40:09,365 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 20:40:09,366 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum01_bug02.i [2022-01-31 20:40:09,430 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/312aaf4bc/ee3f1eb2a7e74945aabf5b1389d36cf1/FLAG59d21dcbc [2022-01-31 20:40:09,725 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 20:40:09,726 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum01_bug02.i [2022-01-31 20:40:09,729 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/312aaf4bc/ee3f1eb2a7e74945aabf5b1389d36cf1/FLAG59d21dcbc [2022-01-31 20:40:10,163 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/312aaf4bc/ee3f1eb2a7e74945aabf5b1389d36cf1 [2022-01-31 20:40:10,165 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 20:40:10,165 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-31 20:40:10,168 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 20:40:10,168 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 20:40:10,170 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 20:40:10,171 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 08:40:10" (1/1) ... [2022-01-31 20:40:10,171 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27c3f416 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:40:10, skipping insertion in model container [2022-01-31 20:40:10,172 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 08:40:10" (1/1) ... [2022-01-31 20:40:10,176 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 20:40:10,184 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 20:40:10,289 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/sum01_bug02.i[812,825] [2022-01-31 20:40:10,313 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 20:40:10,323 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 20:40:10,331 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/sum01_bug02.i[812,825] [2022-01-31 20:40:10,335 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 20:40:10,344 INFO L208 MainTranslator]: Completed translation [2022-01-31 20:40:10,344 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:40:10 WrapperNode [2022-01-31 20:40:10,345 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 20:40:10,346 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 20:40:10,346 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 20:40:10,347 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 20:40:10,354 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:40:10" (1/1) ... [2022-01-31 20:40:10,354 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:40:10" (1/1) ... [2022-01-31 20:40:10,358 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:40:10" (1/1) ... [2022-01-31 20:40:10,358 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:40:10" (1/1) ... [2022-01-31 20:40:10,363 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:40:10" (1/1) ... [2022-01-31 20:40:10,366 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:40:10" (1/1) ... [2022-01-31 20:40:10,368 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:40:10" (1/1) ... [2022-01-31 20:40:10,372 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 20:40:10,373 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 20:40:10,373 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 20:40:10,373 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 20:40:10,374 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:40:10" (1/1) ... [2022-01-31 20:40:10,378 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 20:40:10,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 20:40:10,407 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-31 20:40:10,425 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-31 20:40:10,438 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 20:40:10,438 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 20:40:10,438 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 20:40:10,438 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 20:40:10,438 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 20:40:10,438 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 20:40:10,439 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 20:40:10,439 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-01-31 20:40:10,439 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-01-31 20:40:10,439 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 20:40:10,441 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 20:40:10,441 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 20:40:10,441 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-01-31 20:40:10,441 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 20:40:10,441 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 20:40:10,441 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 20:40:10,442 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 20:40:10,442 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 20:40:10,442 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 20:40:10,442 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 20:40:10,490 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 20:40:10,492 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 20:40:10,603 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 20:40:10,607 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 20:40:10,607 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-01-31 20:40:10,608 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 08:40:10 BoogieIcfgContainer [2022-01-31 20:40:10,608 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 20:40:10,609 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 20:40:10,609 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 20:40:10,625 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 20:40:10,625 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 08:40:10" (1/3) ... [2022-01-31 20:40:10,626 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@131e07cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 08:40:10, skipping insertion in model container [2022-01-31 20:40:10,626 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:40:10" (2/3) ... [2022-01-31 20:40:10,626 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@131e07cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 08:40:10, skipping insertion in model container [2022-01-31 20:40:10,626 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 08:40:10" (3/3) ... [2022-01-31 20:40:10,627 INFO L111 eAbstractionObserver]: Analyzing ICFG sum01_bug02.i [2022-01-31 20:40:10,630 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-01-31 20:40:10,630 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 20:40:10,673 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 20:40:10,677 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=JORDAN [2022-01-31 20:40:10,678 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 20:40:10,685 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 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) [2022-01-31 20:40:10,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-01-31 20:40:10,689 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:40:10,690 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:40:10,690 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:40:10,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:40:10,693 INFO L85 PathProgramCache]: Analyzing trace with hash -872495525, now seen corresponding path program 1 times [2022-01-31 20:40:10,699 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:40:10,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1969330037] [2022-01-31 20:40:10,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:40:10,708 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:40:10,735 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:40:10,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:40:10,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:40:10,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:40:10,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:40:10,827 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:40:10,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1969330037] [2022-01-31 20:40:10,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1969330037] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:40:10,829 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:40:10,829 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 20:40:10,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142992183] [2022-01-31 20:40:10,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:40:10,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 20:40:10,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:40:10,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 20:40:10,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 20:40:10,856 INFO L87 Difference]: Start difference. First operand has 21 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 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 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:40:10,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:40:10,893 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2022-01-31 20:40:10,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 20:40:10,894 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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 11 [2022-01-31 20:40:10,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:40:10,902 INFO L225 Difference]: With dead ends: 32 [2022-01-31 20:40:10,902 INFO L226 Difference]: Without dead ends: 15 [2022-01-31 20:40:10,904 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 20:40:10,907 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 13 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 20:40:10,908 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 24 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 20:40:10,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-01-31 20:40:10,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-01-31 20:40:10,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 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) [2022-01-31 20:40:10,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2022-01-31 20:40:10,932 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 11 [2022-01-31 20:40:10,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:40:10,933 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2022-01-31 20:40:10,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:40:10,933 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2022-01-31 20:40:10,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-01-31 20:40:10,934 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:40:10,934 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:40:10,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 20:40:10,935 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:40:10,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:40:10,936 INFO L85 PathProgramCache]: Analyzing trace with hash -884501298, now seen corresponding path program 1 times [2022-01-31 20:40:10,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:40:10,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [853605854] [2022-01-31 20:40:10,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:40:10,938 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:40:10,941 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:40:10,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:40:11,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:40:11,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:40:11,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:40:11,052 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:40:11,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [853605854] [2022-01-31 20:40:11,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [853605854] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:40:11,053 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:40:11,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 20:40:11,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210191302] [2022-01-31 20:40:11,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:40:11,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 20:40:11,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:40:11,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 20:40:11,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-31 20:40:11,056 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:40:11,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:40:11,136 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2022-01-31 20:40:11,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 20:40:11,136 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 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 11 [2022-01-31 20:40:11,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:40:11,137 INFO L225 Difference]: With dead ends: 24 [2022-01-31 20:40:11,137 INFO L226 Difference]: Without dead ends: 19 [2022-01-31 20:40:11,137 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-01-31 20:40:11,138 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 19 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 20:40:11,139 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 31 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 20:40:11,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-01-31 20:40:11,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-01-31 20:40:11,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 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) [2022-01-31 20:40:11,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2022-01-31 20:40:11,143 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 11 [2022-01-31 20:40:11,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:40:11,143 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2022-01-31 20:40:11,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:40:11,143 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2022-01-31 20:40:11,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-31 20:40:11,144 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:40:11,144 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:40:11,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 20:40:11,144 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:40:11,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:40:11,145 INFO L85 PathProgramCache]: Analyzing trace with hash 60854025, now seen corresponding path program 1 times [2022-01-31 20:40:11,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:40:11,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2136907448] [2022-01-31 20:40:11,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:40:11,326 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=2, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:40:11,327 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 20:40:11,327 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:40:11,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:40:11,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:40:11,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:40:11,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:40:11,583 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:40:11,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2136907448] [2022-01-31 20:40:11,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2136907448] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:40:11,583 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:40:11,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-01-31 20:40:11,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564623431] [2022-01-31 20:40:11,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:40:11,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-31 20:40:11,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:40:11,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-31 20:40:11,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2022-01-31 20:40:11,585 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 11 states, 10 states have (on average 1.1) internal successors, (11), 9 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:40:11,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:40:11,921 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2022-01-31 20:40:11,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 20:40:11,921 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.1) internal successors, (11), 9 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-01-31 20:40:11,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:40:11,923 INFO L225 Difference]: With dead ends: 33 [2022-01-31 20:40:11,923 INFO L226 Difference]: Without dead ends: 28 [2022-01-31 20:40:11,924 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2022-01-31 20:40:11,929 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 36 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:40:11,930 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 47 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 20:40:11,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-01-31 20:40:11,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 25. [2022-01-31 20:40:11,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 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) [2022-01-31 20:40:11,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2022-01-31 20:40:11,941 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 15 [2022-01-31 20:40:11,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:40:11,942 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2022-01-31 20:40:11,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.1) internal successors, (11), 9 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:40:11,942 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2022-01-31 20:40:11,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-31 20:40:11,943 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:40:11,943 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:40:11,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-31 20:40:11,943 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:40:11,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:40:11,944 INFO L85 PathProgramCache]: Analyzing trace with hash -437367422, now seen corresponding path program 1 times [2022-01-31 20:40:11,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:40:11,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2072740336] [2022-01-31 20:40:11,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:40:12,049 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=2, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:40:12,049 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 20:40:12,155 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=2, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:40:12,226 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:40:12,226 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:40:12,226 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:40:12,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-01-31 20:40:12,252 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-01-31 20:40:12,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-01-31 20:40:12,302 INFO L133 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2022-01-31 20:40:12,302 INFO L628 BasicCegarLoop]: Counterexample is feasible [2022-01-31 20:40:12,303 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-01-31 20:40:12,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-31 20:40:12,306 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-01-31 20:40:12,310 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-01-31 20:40:12,317 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 08:40:12 BoogieIcfgContainer [2022-01-31 20:40:12,317 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-31 20:40:12,317 INFO L158 Benchmark]: Toolchain (without parser) took 2151.95ms. Allocated memory was 207.6MB in the beginning and 249.6MB in the end (delta: 41.9MB). Free memory was 155.3MB in the beginning and 199.7MB in the end (delta: -44.3MB). There was no memory consumed. Max. memory is 8.0GB. [2022-01-31 20:40:12,318 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 207.6MB. Free memory was 171.8MB in the beginning and 171.7MB in the end (delta: 89.3kB). There was no memory consumed. Max. memory is 8.0GB. [2022-01-31 20:40:12,318 INFO L158 Benchmark]: CACSL2BoogieTranslator took 177.16ms. Allocated memory is still 207.6MB. Free memory was 155.1MB in the beginning and 181.6MB in the end (delta: -26.5MB). Peak memory consumption was 9.5MB. Max. memory is 8.0GB. [2022-01-31 20:40:12,318 INFO L158 Benchmark]: Boogie Preprocessor took 25.98ms. Allocated memory is still 207.6MB. Free memory was 181.6MB in the beginning and 180.1MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-01-31 20:40:12,319 INFO L158 Benchmark]: RCFGBuilder took 235.37ms. Allocated memory is still 207.6MB. Free memory was 180.1MB in the beginning and 169.1MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-01-31 20:40:12,319 INFO L158 Benchmark]: TraceAbstraction took 1707.84ms. Allocated memory was 207.6MB in the beginning and 249.6MB in the end (delta: 41.9MB). Free memory was 168.5MB in the beginning and 199.7MB in the end (delta: -31.1MB). Peak memory consumption was 11.9MB. Max. memory is 8.0GB. [2022-01-31 20:40:12,320 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 207.6MB. Free memory was 171.8MB in the beginning and 171.7MB in the end (delta: 89.3kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 177.16ms. Allocated memory is still 207.6MB. Free memory was 155.1MB in the beginning and 181.6MB in the end (delta: -26.5MB). Peak memory consumption was 9.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 25.98ms. Allocated memory is still 207.6MB. Free memory was 181.6MB in the beginning and 180.1MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 235.37ms. Allocated memory is still 207.6MB. Free memory was 180.1MB in the beginning and 169.1MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * TraceAbstraction took 1707.84ms. Allocated memory was 207.6MB in the beginning and 249.6MB in the end (delta: 41.9MB). Free memory was 168.5MB in the beginning and 199.7MB in the end (delta: -31.1MB). Peak memory consumption was 11.9MB. 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 - CounterExampleResult [Line: 16]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L23] int i, j=10, n=__VERIFIER_nondet_uint(), sn=0; [L23] int i, j=10, n=__VERIFIER_nondet_uint(), sn=0; [L24] i=1 [L24] COND TRUE i<=n [L25] COND TRUE i