/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-invgen/nested6.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05ce600 [2022-02-24 03:12:30,272 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-24 03:12:30,274 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-24 03:12:30,328 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-24 03:12:30,401 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-24 03:12:30,401 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-24 03:12:30,401 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-24 03:12:30,402 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 03:12:30,412 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-24 03:12:30,412 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-24 03:12:30,413 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-24 03:12:30,413 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-24 03:12:30,413 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-24 03:12:30,413 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-24 03:12:30,414 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-24 03:12:30,414 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-24 03:12:30,414 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-24 03:12:30,414 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-24 03:12:30,414 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-24 03:12:30,414 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-24 03:12:30,415 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-24 03:12:30,415 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-24 03:12:30,415 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-24 03:12:30,415 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-24 03:12:30,415 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-24 03:12:30,415 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-02-24 03:12:30,415 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-24 03:12:30,415 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-02-24 03:12:30,415 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-24 03:12:30,627 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-24 03:12:30,640 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-24 03:12:30,642 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-24 03:12:30,643 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-24 03:12:30,643 INFO L275 PluginConnector]: CDTParser initialized [2022-02-24 03:12:30,644 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/nested6.i [2022-02-24 03:12:30,686 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f9160f0cc/8a77bb263f64467ebcdafa035d517e81/FLAG6868c25f9 [2022-02-24 03:12:31,036 INFO L306 CDTParser]: Found 1 translation units. [2022-02-24 03:12:31,037 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/nested6.i [2022-02-24 03:12:31,041 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f9160f0cc/8a77bb263f64467ebcdafa035d517e81/FLAG6868c25f9 [2022-02-24 03:12:31,057 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f9160f0cc/8a77bb263f64467ebcdafa035d517e81 [2022-02-24 03:12:31,059 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-24 03:12:31,060 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-24 03:12:31,063 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-24 03:12:31,063 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-24 03:12:31,065 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-24 03:12:31,065 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 03:12:31" (1/1) ... [2022-02-24 03:12:31,066 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28ceeb5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:12:31, skipping insertion in model container [2022-02-24 03:12:31,066 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 03:12:31" (1/1) ... [2022-02-24 03:12:31,071 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-24 03:12:31,082 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-24 03:12:31,230 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-invgen/nested6.i[893,906] [2022-02-24 03:12:31,242 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-24 03:12:31,248 INFO L203 MainTranslator]: Completed pre-run [2022-02-24 03:12:31,258 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-invgen/nested6.i[893,906] [2022-02-24 03:12:31,264 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-24 03:12:31,276 INFO L208 MainTranslator]: Completed translation [2022-02-24 03:12:31,276 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:12:31 WrapperNode [2022-02-24 03:12:31,277 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-24 03:12:31,277 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-24 03:12:31,277 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-24 03:12:31,278 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-24 03:12:31,285 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:12:31" (1/1) ... [2022-02-24 03:12:31,285 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:12:31" (1/1) ... [2022-02-24 03:12:31,292 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:12:31" (1/1) ... [2022-02-24 03:12:31,292 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:12:31" (1/1) ... [2022-02-24 03:12:31,296 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:12:31" (1/1) ... [2022-02-24 03:12:31,299 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:12:31" (1/1) ... [2022-02-24 03:12:31,299 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:12:31" (1/1) ... [2022-02-24 03:12:31,301 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-24 03:12:31,301 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-24 03:12:31,301 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-24 03:12:31,301 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-24 03:12:31,302 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:12:31" (1/1) ... [2022-02-24 03:12:31,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-24 03:12:31,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-24 03:12:31,341 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 03:12:31,344 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 03:12:31,374 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-24 03:12:31,374 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-24 03:12:31,375 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-24 03:12:31,375 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-02-24 03:12:31,375 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-24 03:12:31,375 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-24 03:12:31,375 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-24 03:12:31,375 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-24 03:12:31,375 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-02-24 03:12:31,375 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-02-24 03:12:31,375 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-24 03:12:31,375 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-24 03:12:31,376 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-02-24 03:12:31,376 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-24 03:12:31,376 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-02-24 03:12:31,376 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-24 03:12:31,376 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-24 03:12:31,376 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-24 03:12:31,376 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-24 03:12:31,376 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-24 03:12:31,376 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-24 03:12:31,376 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-24 03:12:31,425 INFO L234 CfgBuilder]: Building ICFG [2022-02-24 03:12:31,426 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-24 03:12:31,517 INFO L275 CfgBuilder]: Performing block encoding [2022-02-24 03:12:31,522 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-24 03:12:31,522 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-02-24 03:12:31,523 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 03:12:31 BoogieIcfgContainer [2022-02-24 03:12:31,523 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-24 03:12:31,524 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-24 03:12:31,525 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-24 03:12:31,527 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-24 03:12:31,527 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.02 03:12:31" (1/3) ... [2022-02-24 03:12:31,528 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79e7a187 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 03:12:31, skipping insertion in model container [2022-02-24 03:12:31,528 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:12:31" (2/3) ... [2022-02-24 03:12:31,528 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79e7a187 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 03:12:31, skipping insertion in model container [2022-02-24 03:12:31,528 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 03:12:31" (3/3) ... [2022-02-24 03:12:31,529 INFO L111 eAbstractionObserver]: Analyzing ICFG nested6.i [2022-02-24 03:12:31,532 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-02-24 03:12:31,532 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-24 03:12:31,600 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-24 03:12:31,606 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 03:12:31,606 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-24 03:12:31,633 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 20 states have (on average 1.55) internal successors, (31), 22 states have internal predecessors, (31), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-02-24 03:12:31,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-24 03:12:31,640 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:12:31,640 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:12:31,641 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:12:31,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:12:31,645 INFO L85 PathProgramCache]: Analyzing trace with hash -380972064, now seen corresponding path program 1 times [2022-02-24 03:12:31,667 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:12:31,668 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [485165802] [2022-02-24 03:12:31,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:12:31,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:12:31,727 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 03:12:31,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:12:31,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:12:31,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:12:31,933 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 03:12:31,934 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:12:31,935 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [485165802] [2022-02-24 03:12:31,936 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [485165802] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:12:31,936 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:12:31,936 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-24 03:12:31,937 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902373060] [2022-02-24 03:12:31,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:12:31,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-24 03:12:31,942 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:12:31,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-24 03:12:31,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-02-24 03:12:31,970 INFO L87 Difference]: Start difference. First operand has 30 states, 20 states have (on average 1.55) internal successors, (31), 22 states have internal predecessors, (31), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 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 03:12:32,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:12:32,158 INFO L93 Difference]: Finished difference Result 58 states and 81 transitions. [2022-02-24 03:12:32,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-24 03:12:32,161 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 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 16 [2022-02-24 03:12:32,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:12:32,166 INFO L225 Difference]: With dead ends: 58 [2022-02-24 03:12:32,167 INFO L226 Difference]: Without dead ends: 29 [2022-02-24 03:12:32,169 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-02-24 03:12:32,171 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 39 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:12:32,172 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 52 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 03:12:32,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-02-24 03:12:32,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-02-24 03:12:32,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-24 03:12:32,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2022-02-24 03:12:32,214 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 16 [2022-02-24 03:12:32,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:12:32,215 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2022-02-24 03:12:32,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 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 03:12:32,215 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2022-02-24 03:12:32,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-24 03:12:32,215 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:12:32,216 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:12:32,216 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-24 03:12:32,216 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:12:32,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:12:32,217 INFO L85 PathProgramCache]: Analyzing trace with hash 580085489, now seen corresponding path program 1 times [2022-02-24 03:12:32,217 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:12:32,217 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [673768556] [2022-02-24 03:12:32,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:12:32,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:12:32,219 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 03:12:32,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:12:32,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:12:32,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:12:32,298 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 03:12:32,298 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:12:32,298 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [673768556] [2022-02-24 03:12:32,298 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [673768556] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:12:32,299 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:12:32,299 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-24 03:12:32,299 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941409628] [2022-02-24 03:12:32,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:12:32,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-24 03:12:32,300 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:12:32,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-24 03:12:32,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-02-24 03:12:32,300 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:12:32,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:12:32,455 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2022-02-24 03:12:32,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-24 03:12:32,456 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-02-24 03:12:32,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:12:32,458 INFO L225 Difference]: With dead ends: 41 [2022-02-24 03:12:32,458 INFO L226 Difference]: Without dead ends: 39 [2022-02-24 03:12:32,462 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-02-24 03:12:32,464 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 29 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:12:32,465 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 45 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 03:12:32,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-02-24 03:12:32,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 33. [2022-02-24 03:12:32,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-24 03:12:32,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2022-02-24 03:12:32,486 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 17 [2022-02-24 03:12:32,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:12:32,486 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2022-02-24 03:12:32,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:12:32,487 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2022-02-24 03:12:32,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-24 03:12:32,487 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:12:32,487 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:12:32,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-24 03:12:32,488 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:12:32,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:12:32,488 INFO L85 PathProgramCache]: Analyzing trace with hash -132185391, now seen corresponding path program 1 times [2022-02-24 03:12:32,488 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:12:32,488 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [993965368] [2022-02-24 03:12:32,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:12:32,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:12:32,490 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 03:12:32,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:12:32,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:12:32,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:12:32,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 03:12:32,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:12:32,596 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 03:12:32,597 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:12:32,597 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [993965368] [2022-02-24 03:12:32,597 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [993965368] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:12:32,597 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:12:32,597 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-24 03:12:32,597 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579692808] [2022-02-24 03:12:32,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:12:32,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-24 03:12:32,598 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:12:32,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-24 03:12:32,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-02-24 03:12:32,598 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 03:12:32,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:12:32,718 INFO L93 Difference]: Finished difference Result 46 states and 52 transitions. [2022-02-24 03:12:32,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-24 03:12:32,719 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2022-02-24 03:12:32,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:12:32,721 INFO L225 Difference]: With dead ends: 46 [2022-02-24 03:12:32,721 INFO L226 Difference]: Without dead ends: 44 [2022-02-24 03:12:32,722 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-02-24 03:12:32,727 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 31 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:12:32,728 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 42 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 03:12:32,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-02-24 03:12:32,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-02-24 03:12:32,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 32 states have internal predecessors, (37), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-24 03:12:32,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2022-02-24 03:12:32,738 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 21 [2022-02-24 03:12:32,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:12:32,738 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2022-02-24 03:12:32,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 03:12:32,738 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2022-02-24 03:12:32,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-24 03:12:32,739 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:12:32,739 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:12:32,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-24 03:12:32,739 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:12:32,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:12:32,739 INFO L85 PathProgramCache]: Analyzing trace with hash -512108736, now seen corresponding path program 1 times [2022-02-24 03:12:32,740 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:12:32,740 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1203009356] [2022-02-24 03:12:32,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:12:32,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:12:32,854 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:12:32,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-02-24 03:12:32,864 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-02-24 03:12:32,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-02-24 03:12:32,884 INFO L138 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2022-02-24 03:12:32,885 INFO L628 BasicCegarLoop]: Counterexample is feasible [2022-02-24 03:12:32,886 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-02-24 03:12:32,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-24 03:12:32,889 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-02-24 03:12:32,891 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-02-24 03:12:32,904 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.02 03:12:32 BoogieIcfgContainer [2022-02-24 03:12:32,904 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-24 03:12:32,904 INFO L158 Benchmark]: Toolchain (without parser) took 1844.26ms. Allocated memory was 184.5MB in the beginning and 254.8MB in the end (delta: 70.3MB). Free memory was 127.4MB in the beginning and 136.5MB in the end (delta: -9.1MB). Peak memory consumption was 61.4MB. Max. memory is 8.0GB. [2022-02-24 03:12:32,904 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 184.5MB. Free memory is still 144.1MB. There was no memory consumed. Max. memory is 8.0GB. [2022-02-24 03:12:32,905 INFO L158 Benchmark]: CACSL2BoogieTranslator took 214.29ms. Allocated memory was 184.5MB in the beginning and 254.8MB in the end (delta: 70.3MB). Free memory was 127.3MB in the beginning and 226.2MB in the end (delta: -98.9MB). Peak memory consumption was 12.5MB. Max. memory is 8.0GB. [2022-02-24 03:12:32,906 INFO L158 Benchmark]: Boogie Preprocessor took 23.34ms. Allocated memory is still 254.8MB. Free memory was 226.2MB in the beginning and 224.6MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-02-24 03:12:32,906 INFO L158 Benchmark]: RCFGBuilder took 222.00ms. Allocated memory is still 254.8MB. Free memory was 224.6MB in the beginning and 212.6MB in the end (delta: 12.1MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-02-24 03:12:32,906 INFO L158 Benchmark]: TraceAbstraction took 1379.32ms. Allocated memory is still 254.8MB. Free memory was 212.0MB in the beginning and 136.5MB in the end (delta: 75.5MB). Peak memory consumption was 75.5MB. Max. memory is 8.0GB. [2022-02-24 03:12:32,907 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 184.5MB. Free memory is still 144.1MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 214.29ms. Allocated memory was 184.5MB in the beginning and 254.8MB in the end (delta: 70.3MB). Free memory was 127.3MB in the beginning and 226.2MB in the end (delta: -98.9MB). Peak memory consumption was 12.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 23.34ms. Allocated memory is still 254.8MB. Free memory was 226.2MB in the beginning and 224.6MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 222.00ms. Allocated memory is still 254.8MB. Free memory was 224.6MB in the beginning and 212.6MB in the end (delta: 12.1MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * TraceAbstraction took 1379.32ms. Allocated memory is still 254.8MB. Free memory was 212.0MB in the beginning and 136.5MB in the end (delta: 75.5MB). Peak memory consumption was 75.5MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 19]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L25] int i,j,k,n; [L26] k = __VERIFIER_nondet_int() [L27] n = __VERIFIER_nondet_int() [L28] COND FALSE !(!(n < 1000000)) [L29] COND TRUE k == n [L33] i=0 [L33] COND TRUE i= n ) [L18] COND FALSE !(!(cond)) [L41] RET __VERIFIER_assert( k >= n ) [L42] CALL __VERIFIER_assert( k <= n ) [L18] COND TRUE !(cond) [L19] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 37 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 1.3s, OverallIterations: 4, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 102 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 99 mSDsluCounter, 139 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 60 mSDsCounter, 51 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 317 IncrementalHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 51 mSolverCounterUnsat, 79 mSDtfsCounter, 317 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=44occurred in iteration=3, InterpolantAutomatonStates: 22, 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, 6 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, 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 RESULT: Ultimate proved your program to be incorrect! [2022-02-24 03:12:32,932 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...