/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-acceleration/phases_2-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-6c470ae [2022-02-15 03:51:52,140 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-15 03:51:52,142 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-15 03:51:52,164 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-15 03:51:52,170 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-15 03:51:52,170 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-15 03:51:52,171 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-15 03:51:52,172 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-15 03:51:52,172 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-15 03:51:52,173 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-15 03:51:52,174 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-15 03:51:52,175 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-15 03:51:52,176 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-15 03:51:52,177 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-15 03:51:52,177 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-15 03:51:52,178 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-15 03:51:52,180 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-02-15 03:51:52,185 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-15 03:51:52,185 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-15 03:51:52,185 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-15 03:51:52,186 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-02-15 03:51:52,193 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-15 03:51:52,193 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-15 03:51:52,194 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-15 03:51:52,194 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-15 03:51:52,194 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-15 03:51:52,194 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-15 03:51:52,194 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-15 03:51:52,194 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-15 03:51:52,194 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-15 03:51:52,194 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-15 03:51:52,194 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-15 03:51:52,194 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-15 03:51:52,195 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-15 03:51:52,195 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-15 03:51:52,195 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-15 03:51:52,195 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-15 03:51:52,197 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-15 03:51:52,197 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-02-15 03:51:52,197 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-15 03:51:52,197 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-02-15 03:51:52,197 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-15 03:51:52,385 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-15 03:51:52,399 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-15 03:51:52,401 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-15 03:51:52,401 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-15 03:51:52,404 INFO L275 PluginConnector]: CDTParser initialized [2022-02-15 03:51:52,405 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/phases_2-2.c [2022-02-15 03:51:52,449 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d9ffa71e1/2a8555df3a644173aa1626ac4e60c8d0/FLAGfdf81d995 [2022-02-15 03:51:52,755 INFO L306 CDTParser]: Found 1 translation units. [2022-02-15 03:51:52,756 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/phases_2-2.c [2022-02-15 03:51:52,768 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d9ffa71e1/2a8555df3a644173aa1626ac4e60c8d0/FLAGfdf81d995 [2022-02-15 03:51:53,191 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d9ffa71e1/2a8555df3a644173aa1626ac4e60c8d0 [2022-02-15 03:51:53,196 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-15 03:51:53,197 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-15 03:51:53,198 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-15 03:51:53,198 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-15 03:51:53,200 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-15 03:51:53,201 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 03:51:53" (1/1) ... [2022-02-15 03:51:53,202 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5af7af3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 03:51:53, skipping insertion in model container [2022-02-15 03:51:53,202 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 03:51:53" (1/1) ... [2022-02-15 03:51:53,206 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-15 03:51:53,215 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-15 03:51:53,319 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-acceleration/phases_2-2.c[459,472] [2022-02-15 03:51:53,332 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-15 03:51:53,337 INFO L203 MainTranslator]: Completed pre-run [2022-02-15 03:51:53,344 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-acceleration/phases_2-2.c[459,472] [2022-02-15 03:51:53,346 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-15 03:51:53,353 INFO L208 MainTranslator]: Completed translation [2022-02-15 03:51:53,354 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 03:51:53 WrapperNode [2022-02-15 03:51:53,354 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-15 03:51:53,354 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-15 03:51:53,355 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-15 03:51:53,355 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-15 03:51:53,362 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 03:51:53" (1/1) ... [2022-02-15 03:51:53,362 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 03:51:53" (1/1) ... [2022-02-15 03:51:53,366 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 03:51:53" (1/1) ... [2022-02-15 03:51:53,366 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 03:51:53" (1/1) ... [2022-02-15 03:51:53,369 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 03:51:53" (1/1) ... [2022-02-15 03:51:53,371 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 03:51:53" (1/1) ... [2022-02-15 03:51:53,371 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 03:51:53" (1/1) ... [2022-02-15 03:51:53,372 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-15 03:51:53,373 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-15 03:51:53,373 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-15 03:51:53,373 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-15 03:51:53,373 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 03:51:53" (1/1) ... [2022-02-15 03:51:53,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-15 03:51:53,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 03:51:53,393 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-02-15 03:51:53,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-02-15 03:51:53,423 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-15 03:51:53,423 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-15 03:51:53,423 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-15 03:51:53,423 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-02-15 03:51:53,423 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-15 03:51:53,424 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-15 03:51:53,424 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-15 03:51:53,424 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-15 03:51:53,424 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-15 03:51:53,424 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-15 03:51:53,424 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-02-15 03:51:53,425 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-02-15 03:51:53,425 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-15 03:51:53,425 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-15 03:51:53,426 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-15 03:51:53,426 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-15 03:51:53,426 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-15 03:51:53,427 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-15 03:51:53,428 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-15 03:51:53,428 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-15 03:51:53,467 INFO L234 CfgBuilder]: Building ICFG [2022-02-15 03:51:53,468 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-15 03:51:53,584 INFO L275 CfgBuilder]: Performing block encoding [2022-02-15 03:51:53,589 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-15 03:51:53,589 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-02-15 03:51:53,590 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 03:51:53 BoogieIcfgContainer [2022-02-15 03:51:53,590 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-15 03:51:53,591 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-15 03:51:53,591 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-15 03:51:53,593 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-15 03:51:53,593 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 03:51:53" (1/3) ... [2022-02-15 03:51:53,594 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b0beb0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 03:51:53, skipping insertion in model container [2022-02-15 03:51:53,594 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 03:51:53" (2/3) ... [2022-02-15 03:51:53,594 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b0beb0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 03:51:53, skipping insertion in model container [2022-02-15 03:51:53,594 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 03:51:53" (3/3) ... [2022-02-15 03:51:53,595 INFO L111 eAbstractionObserver]: Analyzing ICFG phases_2-2.c [2022-02-15 03:51:53,599 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-02-15 03:51:53,599 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-15 03:51:53,651 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-15 03:51:53,656 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=AcceleratedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=QVASR [2022-02-15 03:51:53,656 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-15 03:51:53,685 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 12 states have (on average 1.5) 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) [2022-02-15 03:51:53,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-02-15 03:51:53,690 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:51:53,690 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:51:53,691 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:51:53,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:51:53,694 INFO L85 PathProgramCache]: Analyzing trace with hash -36402350, now seen corresponding path program 1 times [2022-02-15 03:51:53,705 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:51:53,707 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1066786366] [2022-02-15 03:51:53,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:51:53,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:51:53,760 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:51:53,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:51:54,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:51:54,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:51:54,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:51:54,052 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:51:54,053 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1066786366] [2022-02-15 03:51:54,054 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1066786366] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:51:54,055 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:51:54,055 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-15 03:51:54,056 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868066688] [2022-02-15 03:51:54,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:51:54,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-15 03:51:54,059 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:51:54,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-15 03:51:54,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-02-15 03:51:54,085 INFO L87 Difference]: Start difference. First operand has 20 states, 12 states have (on average 1.5) 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 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 6 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:51:54,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:51:54,280 INFO L93 Difference]: Finished difference Result 42 states and 52 transitions. [2022-02-15 03:51:54,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-15 03:51:54,284 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 6 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-02-15 03:51:54,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:51:54,289 INFO L225 Difference]: With dead ends: 42 [2022-02-15 03:51:54,290 INFO L226 Difference]: Without dead ends: 16 [2022-02-15 03:51:54,293 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2022-02-15 03:51:54,296 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 31 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 03:51:54,297 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 50 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 03:51:54,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-02-15 03:51:54,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-02-15 03:51:54,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:51:54,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2022-02-15 03:51:54,327 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 12 [2022-02-15 03:51:54,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:51:54,327 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2022-02-15 03:51:54,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 6 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:51:54,328 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2022-02-15 03:51:54,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-15 03:51:54,329 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:51:54,329 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:51:54,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-15 03:51:54,330 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:51:54,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:51:54,331 INFO L85 PathProgramCache]: Analyzing trace with hash 476304909, now seen corresponding path program 1 times [2022-02-15 03:51:54,331 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:51:54,331 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [932268827] [2022-02-15 03:51:54,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:51:54,401 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 03:51:54,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:51:54,422 WARN L132 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2022-02-15 03:51:54,423 INFO L628 BasicCegarLoop]: Counterexample might be feasible [2022-02-15 03:51:54,426 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-02-15 03:51:54,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-15 03:51:54,430 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1] [2022-02-15 03:51:54,450 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-02-15 03:51:54,457 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.02 03:51:54 BoogieIcfgContainer [2022-02-15 03:51:54,458 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-15 03:51:54,458 INFO L158 Benchmark]: Toolchain (without parser) took 1261.21ms. Allocated memory was 188.7MB in the beginning and 240.1MB in the end (delta: 51.4MB). Free memory was 138.3MB in the beginning and 218.0MB in the end (delta: -79.7MB). Peak memory consumption was 31.0MB. Max. memory is 8.0GB. [2022-02-15 03:51:54,460 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 188.7MB. Free memory was 154.2MB in the beginning and 154.1MB in the end (delta: 143.5kB). There was no memory consumed. Max. memory is 8.0GB. [2022-02-15 03:51:54,460 INFO L158 Benchmark]: CACSL2BoogieTranslator took 156.22ms. Allocated memory is still 188.7MB. Free memory was 138.2MB in the beginning and 165.8MB in the end (delta: -27.6MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2022-02-15 03:51:54,462 INFO L158 Benchmark]: Boogie Preprocessor took 17.80ms. Allocated memory is still 188.7MB. Free memory was 165.5MB in the beginning and 164.1MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-02-15 03:51:54,462 INFO L158 Benchmark]: RCFGBuilder took 217.27ms. Allocated memory is still 188.7MB. Free memory was 164.1MB in the beginning and 153.6MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-02-15 03:51:54,462 INFO L158 Benchmark]: TraceAbstraction took 866.76ms. Allocated memory was 188.7MB in the beginning and 240.1MB in the end (delta: 51.4MB). Free memory was 153.2MB in the beginning and 218.0MB in the end (delta: -64.8MB). Peak memory consumption was 46.1MB. Max. memory is 8.0GB. [2022-02-15 03:51:54,464 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 188.7MB. Free memory was 154.2MB in the beginning and 154.1MB in the end (delta: 143.5kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 156.22ms. Allocated memory is still 188.7MB. Free memory was 138.2MB in the beginning and 165.8MB in the end (delta: -27.6MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * Boogie Preprocessor took 17.80ms. Allocated memory is still 188.7MB. Free memory was 165.5MB in the beginning and 164.1MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 217.27ms. Allocated memory is still 188.7MB. Free memory was 164.1MB in the beginning and 153.6MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * TraceAbstraction took 866.76ms. Allocated memory was 188.7MB in the beginning and 240.1MB in the end (delta: 51.4MB). Free memory was 153.2MB in the beginning and 218.0MB in the end (delta: -64.8MB). Peak memory consumption was 46.1MB. 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 - UnprovableResult [Line: 12]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L18] unsigned int x = 1; [L19] unsigned int y = __VERIFIER_nondet_uint(); [L21] COND FALSE !(!(y > 0)) [L23] COND TRUE x < y [L24] COND FALSE !(x < y / x) [L27] x++ [L23] COND FALSE !(x < y) [L31] CALL __VERIFIER_assert(x == y) [L11] COND TRUE !(cond) [L12] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 27 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.8s, OverallIterations: 2, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 32 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 31 mSDsluCounter, 50 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 33 mSDsCounter, 9 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 94 IncrementalHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 9 mSolverCounterUnsat, 17 mSDtfsCounter, 94 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred in iteration=0, InterpolantAutomatonStates: 9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 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 could not prove your program: unable to determine feasibility of some traces [2022-02-15 03:51:54,491 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...