/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/loop-acceleration/phases_1-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 20:52:16,250 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 20:52:16,252 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 20:52:16,315 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-31 20:52:16,331 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 20:52:16,333 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 20:52:16,334 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 20:52:16,335 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 20:52:16,336 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 20:52:16,336 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 20:52:16,340 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 20:52:16,344 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 20:52:16,346 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 20:52:16,346 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 20:52:16,348 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 20:52:16,348 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 20:52:16,351 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 20:52:16,356 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 20:52:16,357 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 20:52:16,357 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 20:52:16,358 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 20:52:16,368 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 20:52:16,368 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 20:52:16,370 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 20:52:16,370 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 20:52:16,370 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 20:52:16,370 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 20:52:16,370 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 20:52:16,371 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 20:52:16,371 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 20:52:16,371 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 20:52:16,371 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 20:52:16,372 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 20:52:16,372 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 20:52:16,372 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 20:52:16,372 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 20:52:16,372 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 20:52:16,372 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 20:52:16,372 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 20:52:16,372 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 20:52:16,373 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 20:52:16,373 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-01-31 20:52:16,373 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-31 20:52:16,373 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-01-31 20:52:16,373 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 20:52:16,583 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 20:52:16,601 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 20:52:16,603 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 20:52:16,604 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 20:52:16,607 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 20:52:16,607 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/phases_1-2.c [2022-01-31 20:52:16,666 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a4a5e5ba4/4b9a9ed3398c4f4b9e9a1f421ae0c5dc/FLAG11d5ffa5a [2022-01-31 20:52:17,059 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 20:52:17,059 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/phases_1-2.c [2022-01-31 20:52:17,063 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a4a5e5ba4/4b9a9ed3398c4f4b9e9a1f421ae0c5dc/FLAG11d5ffa5a [2022-01-31 20:52:17,490 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a4a5e5ba4/4b9a9ed3398c4f4b9e9a1f421ae0c5dc [2022-01-31 20:52:17,492 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 20:52:17,493 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-31 20:52:17,494 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 20:52:17,494 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 20:52:17,498 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 20:52:17,498 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 08:52:17" (1/1) ... [2022-01-31 20:52:17,499 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31b7e85d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:52:17, skipping insertion in model container [2022-01-31 20:52:17,499 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 08:52:17" (1/1) ... [2022-01-31 20:52:17,509 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 20:52:17,520 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 20:52:17,642 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_1-2.c[322,335] [2022-01-31 20:52:17,651 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 20:52:17,656 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 20:52:17,663 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_1-2.c[322,335] [2022-01-31 20:52:17,666 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 20:52:17,677 INFO L208 MainTranslator]: Completed translation [2022-01-31 20:52:17,677 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:52:17 WrapperNode [2022-01-31 20:52:17,677 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 20:52:17,678 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 20:52:17,678 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 20:52:17,678 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 20:52:17,686 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:52:17" (1/1) ... [2022-01-31 20:52:17,686 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:52:17" (1/1) ... [2022-01-31 20:52:17,690 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:52:17" (1/1) ... [2022-01-31 20:52:17,691 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:52:17" (1/1) ... [2022-01-31 20:52:17,694 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:52:17" (1/1) ... [2022-01-31 20:52:17,696 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:52:17" (1/1) ... [2022-01-31 20:52:17,697 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:52:17" (1/1) ... [2022-01-31 20:52:17,698 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 20:52:17,698 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 20:52:17,699 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 20:52:17,699 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 20:52:17,699 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:52:17" (1/1) ... [2022-01-31 20:52:17,705 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 20:52:17,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 20:52:17,725 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 20:52:17,748 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 20:52:17,765 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 20:52:17,765 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 20:52:17,765 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 20:52:17,765 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 20:52:17,765 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 20:52:17,765 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 20:52:17,766 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 20:52:17,766 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 20:52:17,766 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 20:52:17,766 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 20:52:17,766 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 20:52:17,766 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 20:52:17,766 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 20:52:17,766 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 20:52:17,766 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 20:52:17,767 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 20:52:17,767 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 20:52:17,813 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 20:52:17,815 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 20:52:17,884 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 20:52:17,889 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 20:52:17,889 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-01-31 20:52:17,890 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 08:52:17 BoogieIcfgContainer [2022-01-31 20:52:17,891 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 20:52:17,892 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 20:52:17,892 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 20:52:17,895 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 20:52:17,895 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 08:52:17" (1/3) ... [2022-01-31 20:52:17,896 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@598551f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 08:52:17, skipping insertion in model container [2022-01-31 20:52:17,896 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:52:17" (2/3) ... [2022-01-31 20:52:17,896 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@598551f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 08:52:17, skipping insertion in model container [2022-01-31 20:52:17,896 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 08:52:17" (3/3) ... [2022-01-31 20:52:17,897 INFO L111 eAbstractionObserver]: Analyzing ICFG phases_1-2.c [2022-01-31 20:52:17,901 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-01-31 20:52:17,901 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 20:52:17,935 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 20:52:17,941 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 20:52:17,942 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 20:52:17,957 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 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 20:52:17,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-01-31 20:52:17,973 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:52:17,973 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:52:17,974 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:52:17,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:52:17,982 INFO L85 PathProgramCache]: Analyzing trace with hash 491760044, now seen corresponding path program 1 times [2022-01-31 20:52:17,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:52:17,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1767731787] [2022-01-31 20:52:17,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:52:18,003 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:52:18,042 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:52:18,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:52:18,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:52:18,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:52:18,152 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 20:52:18,153 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:52:18,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1767731787] [2022-01-31 20:52:18,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1767731787] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:52:18,155 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:52:18,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 20:52:18,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876756271] [2022-01-31 20:52:18,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:52:18,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 20:52:18,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:52:18,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 20:52:18,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 20:52:18,192 INFO L87 Difference]: Start difference. First operand has 19 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 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 20:52:18,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:52:18,241 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2022-01-31 20:52:18,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 20:52:18,243 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 20:52:18,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:52:18,258 INFO L225 Difference]: With dead ends: 30 [2022-01-31 20:52:18,258 INFO L226 Difference]: Without dead ends: 13 [2022-01-31 20:52:18,261 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 20:52:18,263 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 11 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 22 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 20:52:18,264 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 22 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 20:52:18,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-01-31 20:52:18,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2022-01-31 20:52:18,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:52:18,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2022-01-31 20:52:18,287 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 11 [2022-01-31 20:52:18,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:52:18,287 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2022-01-31 20:52:18,288 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 20:52:18,288 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2022-01-31 20:52:18,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-01-31 20:52:18,288 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:52:18,288 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:52:18,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 20:52:18,289 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:52:18,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:52:18,290 INFO L85 PathProgramCache]: Analyzing trace with hash 482524834, now seen corresponding path program 1 times [2022-01-31 20:52:18,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:52:18,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1154884835] [2022-01-31 20:52:18,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:52:18,291 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:52:18,292 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:52:18,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:52:18,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:52:18,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:52:18,407 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 20:52:18,407 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:52:18,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1154884835] [2022-01-31 20:52:18,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1154884835] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:52:18,408 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:52:18,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 20:52:18,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623582768] [2022-01-31 20:52:18,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:52:18,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 20:52:18,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:52:18,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 20:52:18,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 20:52:18,412 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 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 20:52:18,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:52:18,460 INFO L93 Difference]: Finished difference Result 22 states and 26 transitions. [2022-01-31 20:52:18,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 20:52:18,461 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 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 20:52:18,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:52:18,462 INFO L225 Difference]: With dead ends: 22 [2022-01-31 20:52:18,462 INFO L226 Difference]: Without dead ends: 15 [2022-01-31 20:52:18,462 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-31 20:52:18,464 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 10 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 20:52:18,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 19 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 20:52:18,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-01-31 20:52:18,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-01-31 20:52:18,468 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 20:52:18,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2022-01-31 20:52:18,469 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 11 [2022-01-31 20:52:18,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:52:18,469 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2022-01-31 20:52:18,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 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 20:52:18,470 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2022-01-31 20:52:18,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-01-31 20:52:18,470 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:52:18,470 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:52:18,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 20:52:18,471 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:52:18,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:52:18,471 INFO L85 PathProgramCache]: Analyzing trace with hash 925229631, now seen corresponding path program 1 times [2022-01-31 20:52:18,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:52:18,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1200416471] [2022-01-31 20:52:18,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:52:18,614 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:52:18,615 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 20:52:18,616 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:52:18,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:52:18,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:52:18,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:52:18,718 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 20:52:18,805 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:52:18,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1200416471] [2022-01-31 20:52:18,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1200416471] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:52:18,806 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:52:18,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 20:52:18,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351681347] [2022-01-31 20:52:18,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:52:18,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 20:52:18,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:52:18,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 20:52:18,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-01-31 20:52:18,808 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:52:18,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:52:18,913 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2022-01-31 20:52:18,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 20:52:18,914 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-01-31 20:52:18,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:52:18,914 INFO L225 Difference]: With dead ends: 22 [2022-01-31 20:52:18,915 INFO L226 Difference]: Without dead ends: 17 [2022-01-31 20:52:18,915 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-01-31 20:52:18,916 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 10 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 20:52:18,917 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 18 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 20:52:18,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-01-31 20:52:18,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-01-31 20:52:18,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 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 20:52:18,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2022-01-31 20:52:18,923 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 13 [2022-01-31 20:52:18,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:52:18,923 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2022-01-31 20:52:18,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:52:18,923 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2022-01-31 20:52:18,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-31 20:52:18,924 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:52:18,924 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:52:18,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-31 20:52:18,925 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:52:18,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:52:18,925 INFO L85 PathProgramCache]: Analyzing trace with hash 1220035546, now seen corresponding path program 1 times [2022-01-31 20:52:18,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:52:18,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1023848316] [2022-01-31 20:52:18,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:52:19,002 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:52:19,115 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:52:19,116 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:52:19,269 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:52:19,269 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:52:19,270 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:52:19,289 WARN L250 erpolLogProxyWrapper]: Quant: Clause contains literal that is not almost uninterpreted: (not (<= (+ (* (- 2) .v_it_3.0) (- main_~x~0_6) (* 4294967296 (div (+ (* 2 .v_it_3.0) main_~x~0_6) 4294967296)) 268435455) 0)) [2022-01-31 20:52:19,293 WARN L250 erpolLogProxyWrapper]: Quant: Clause contains literal that is not almost uninterpreted: (<= (+ (* (- 2) .v_it_3.0) (- main_~x~0_6) (* 4294967296 (div (+ (* 2 .v_it_3.0) main_~x~0_6) 4294967296)) 65521) 0) [2022-01-31 20:52:19,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2022-01-31 20:52:19,374 WARN L127 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2022-01-31 20:52:19,374 INFO L628 BasicCegarLoop]: Counterexample might be feasible [2022-01-31 20:52:19,378 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-01-31 20:52:19,381 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-31 20:52:19,383 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-01-31 20:52:19,385 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-01-31 20:52:19,401 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 08:52:19 BoogieIcfgContainer [2022-01-31 20:52:19,402 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-31 20:52:19,404 INFO L158 Benchmark]: Toolchain (without parser) took 1910.36ms. Allocated memory was 210.8MB in the beginning and 263.2MB in the end (delta: 52.4MB). Free memory was 155.9MB in the beginning and 222.6MB in the end (delta: -66.6MB). There was no memory consumed. Max. memory is 8.0GB. [2022-01-31 20:52:19,404 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 210.8MB. Free memory is still 172.0MB. There was no memory consumed. Max. memory is 8.0GB. [2022-01-31 20:52:19,405 INFO L158 Benchmark]: CACSL2BoogieTranslator took 183.22ms. Allocated memory is still 210.8MB. Free memory was 155.7MB in the beginning and 182.3MB in the end (delta: -26.6MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-01-31 20:52:19,407 INFO L158 Benchmark]: Boogie Preprocessor took 20.03ms. Allocated memory is still 210.8MB. Free memory was 182.3MB in the beginning and 180.8MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-01-31 20:52:19,407 INFO L158 Benchmark]: RCFGBuilder took 192.22ms. Allocated memory is still 210.8MB. Free memory was 180.8MB in the beginning and 170.9MB in the end (delta: 9.9MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-01-31 20:52:19,410 INFO L158 Benchmark]: TraceAbstraction took 1510.88ms. Allocated memory was 210.8MB in the beginning and 263.2MB in the end (delta: 52.4MB). Free memory was 170.3MB in the beginning and 222.6MB in the end (delta: -52.2MB). Peak memory consumption was 719.5kB. Max. memory is 8.0GB. [2022-01-31 20:52:19,412 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 210.8MB. Free memory is still 172.0MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 183.22ms. Allocated memory is still 210.8MB. Free memory was 155.7MB in the beginning and 182.3MB in the end (delta: -26.6MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * Boogie Preprocessor took 20.03ms. Allocated memory is still 210.8MB. Free memory was 182.3MB in the beginning and 180.8MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 192.22ms. Allocated memory is still 210.8MB. Free memory was 180.8MB in the beginning and 170.9MB in the end (delta: 9.9MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * TraceAbstraction took 1510.88ms. Allocated memory was 210.8MB in the beginning and 263.2MB in the end (delta: 52.4MB). Free memory was 170.3MB in the beginning and 222.6MB in the end (delta: -52.2MB). Peak memory consumption was 719.5kB. 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: 7]: 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: [L13] unsigned int x = 0; [L15] COND TRUE x < 0x0fffffff [L16] COND TRUE x < 0xfff1 [L17] x++ [L15] COND TRUE x < 0x0fffffff [L16] COND FALSE !(x < 0xfff1) [L19] x += 2 [L15] COND FALSE !(x < 0x0fffffff) [L23] CALL __VERIFIER_assert(!(x % 2)) [L6] COND TRUE !(cond) [L7] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 22 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 1.5s, OverallIterations: 4, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.3s, 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, 59 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 17 mSDsCounter, 11 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 30 IncrementalHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 11 mSolverCounterUnsat, 42 mSDtfsCounter, 30 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=19occurred in iteration=0, InterpolantAutomatonStates: 12, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 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 [2022-01-31 20:52:19,430 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...