/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/array_3-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-6c470ae [2022-02-15 01:25:32,039 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-15 01:25:32,041 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-15 01:25:32,103 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-15 01:25:32,109 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-15 01:25:32,110 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-15 01:25:32,110 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-15 01:25:32,111 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-15 01:25:32,111 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-15 01:25:32,112 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-15 01:25:32,113 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-15 01:25:32,114 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-15 01:25:32,115 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-15 01:25:32,119 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-15 01:25:32,121 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-15 01:25:32,122 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-15 01:25:32,127 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-02-15 01:25:32,131 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-15 01:25:32,131 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-15 01:25:32,132 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-15 01:25:32,132 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-02-15 01:25:32,138 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-15 01:25:32,138 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-15 01:25:32,139 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-15 01:25:32,139 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-15 01:25:32,139 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-15 01:25:32,139 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-15 01:25:32,140 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-15 01:25:32,140 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-15 01:25:32,140 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-15 01:25:32,140 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-15 01:25:32,140 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-15 01:25:32,140 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-15 01:25:32,140 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-15 01:25:32,140 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-15 01:25:32,140 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-15 01:25:32,141 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-15 01:25:32,141 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-15 01:25:32,141 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-15 01:25:32,141 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-15 01:25:32,141 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-15 01:25:32,141 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-02-15 01:25:32,141 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-15 01:25:32,141 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-02-15 01:25:32,142 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-15 01:25:32,336 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-15 01:25:32,354 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-15 01:25:32,356 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-15 01:25:32,357 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-15 01:25:32,358 INFO L275 PluginConnector]: CDTParser initialized [2022-02-15 01:25:32,359 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_3-1.i [2022-02-15 01:25:32,401 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de660bbca/d7caeb4b892c4973b2b1bde62140c38d/FLAG8508358da [2022-02-15 01:25:32,718 INFO L306 CDTParser]: Found 1 translation units. [2022-02-15 01:25:32,719 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_3-1.i [2022-02-15 01:25:32,730 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de660bbca/d7caeb4b892c4973b2b1bde62140c38d/FLAG8508358da [2022-02-15 01:25:33,152 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de660bbca/d7caeb4b892c4973b2b1bde62140c38d [2022-02-15 01:25:33,154 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-15 01:25:33,156 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-15 01:25:33,158 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-15 01:25:33,158 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-15 01:25:33,161 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-15 01:25:33,161 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 01:25:33" (1/1) ... [2022-02-15 01:25:33,162 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7acfcf02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:25:33, skipping insertion in model container [2022-02-15 01:25:33,162 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 01:25:33" (1/1) ... [2022-02-15 01:25:33,166 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-15 01:25:33,176 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-15 01:25:33,279 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/array_3-1.i[849,862] [2022-02-15 01:25:33,288 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-15 01:25:33,292 INFO L203 MainTranslator]: Completed pre-run [2022-02-15 01:25:33,300 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/array_3-1.i[849,862] [2022-02-15 01:25:33,302 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-15 01:25:33,310 INFO L208 MainTranslator]: Completed translation [2022-02-15 01:25:33,311 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:25:33 WrapperNode [2022-02-15 01:25:33,311 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-15 01:25:33,311 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-15 01:25:33,311 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-15 01:25:33,311 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-15 01:25:33,318 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:25:33" (1/1) ... [2022-02-15 01:25:33,318 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:25:33" (1/1) ... [2022-02-15 01:25:33,321 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:25:33" (1/1) ... [2022-02-15 01:25:33,322 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:25:33" (1/1) ... [2022-02-15 01:25:33,325 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:25:33" (1/1) ... [2022-02-15 01:25:33,327 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:25:33" (1/1) ... [2022-02-15 01:25:33,328 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:25:33" (1/1) ... [2022-02-15 01:25:33,329 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-15 01:25:33,329 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-15 01:25:33,330 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-15 01:25:33,330 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-15 01:25:33,330 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:25:33" (1/1) ... [2022-02-15 01:25:33,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-15 01:25:33,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 01:25:33,349 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 01:25:33,354 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 01:25:33,375 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-15 01:25:33,375 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-15 01:25:33,375 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-15 01:25:33,375 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-15 01:25:33,375 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-15 01:25:33,375 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-15 01:25:33,375 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-15 01:25:33,375 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-02-15 01:25:33,375 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-02-15 01:25:33,375 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-15 01:25:33,376 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-15 01:25:33,376 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-02-15 01:25:33,376 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-15 01:25:33,376 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-15 01:25:33,376 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-02-15 01:25:33,376 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-15 01:25:33,376 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-15 01:25:33,376 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-15 01:25:33,376 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-15 01:25:33,376 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-15 01:25:33,376 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-15 01:25:33,421 INFO L234 CfgBuilder]: Building ICFG [2022-02-15 01:25:33,422 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-15 01:25:33,497 INFO L275 CfgBuilder]: Performing block encoding [2022-02-15 01:25:33,501 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-15 01:25:33,501 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-02-15 01:25:33,503 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 01:25:33 BoogieIcfgContainer [2022-02-15 01:25:33,503 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-15 01:25:33,504 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-15 01:25:33,504 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-15 01:25:33,507 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-15 01:25:33,507 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 01:25:33" (1/3) ... [2022-02-15 01:25:33,508 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3599b19d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 01:25:33, skipping insertion in model container [2022-02-15 01:25:33,508 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:25:33" (2/3) ... [2022-02-15 01:25:33,508 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3599b19d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 01:25:33, skipping insertion in model container [2022-02-15 01:25:33,508 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 01:25:33" (3/3) ... [2022-02-15 01:25:33,509 INFO L111 eAbstractionObserver]: Analyzing ICFG array_3-1.i [2022-02-15 01:25:33,513 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-02-15 01:25:33,513 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-15 01:25:33,562 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-15 01:25:33,566 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 [2022-02-15 01:25:33,566 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-15 01:25:33,592 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 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 01:25:33,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-02-15 01:25:33,597 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:25:33,597 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:25:33,597 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:25:33,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:25:33,600 INFO L85 PathProgramCache]: Analyzing trace with hash 1037683284, now seen corresponding path program 1 times [2022-02-15 01:25:33,625 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:25:33,625 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [288050525] [2022-02-15 01:25:33,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:25:33,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:25:33,674 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:25:33,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:25:33,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:25:33,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:25:33,797 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 01:25:33,798 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:25:33,799 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [288050525] [2022-02-15 01:25:33,800 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [288050525] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:25:33,800 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:25:33,801 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-15 01:25:33,802 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231885766] [2022-02-15 01:25:33,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:25:33,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-15 01:25:33,807 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:25:33,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-15 01:25:33,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-15 01:25:33,834 INFO L87 Difference]: Start difference. First operand has 25 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 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 3.0) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:25:33,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:25:33,895 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2022-02-15 01:25:33,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-15 01:25:33,898 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-02-15 01:25:33,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:25:33,907 INFO L225 Difference]: With dead ends: 42 [2022-02-15 01:25:33,907 INFO L226 Difference]: Without dead ends: 18 [2022-02-15 01:25:33,909 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 [2022-02-15 01:25:33,915 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 18 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 29 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 [2022-02-15 01:25:33,916 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 29 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 01:25:33,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-02-15 01:25:33,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-02-15 01:25:33,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 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 01:25:33,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2022-02-15 01:25:33,945 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 13 [2022-02-15 01:25:33,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:25:33,946 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2022-02-15 01:25:33,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:25:33,946 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2022-02-15 01:25:33,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-15 01:25:33,946 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:25:33,946 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:25:33,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-15 01:25:33,947 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:25:33,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:25:33,949 INFO L85 PathProgramCache]: Analyzing trace with hash -193552662, now seen corresponding path program 1 times [2022-02-15 01:25:33,949 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:25:33,949 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1805700651] [2022-02-15 01:25:33,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:25:33,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:25:33,956 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:25:33,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:25:33,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:25:33,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:25:34,004 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 01:25:34,005 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:25:34,005 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1805700651] [2022-02-15 01:25:34,005 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1805700651] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:25:34,005 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:25:34,005 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 01:25:34,005 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748647503] [2022-02-15 01:25:34,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:25:34,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 01:25:34,006 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:25:34,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 01:25:34,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 01:25:34,006 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:25:34,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:25:34,058 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2022-02-15 01:25:34,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 01:25:34,059 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-02-15 01:25:34,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:25:34,064 INFO L225 Difference]: With dead ends: 35 [2022-02-15 01:25:34,064 INFO L226 Difference]: Without dead ends: 25 [2022-02-15 01:25:34,064 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-15 01:25:34,065 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 24 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 01:25:34,066 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 22 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 01:25:34,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-02-15 01:25:34,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2022-02-15 01:25:34,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 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 01:25:34,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2022-02-15 01:25:34,071 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 14 [2022-02-15 01:25:34,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:25:34,071 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2022-02-15 01:25:34,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:25:34,071 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2022-02-15 01:25:34,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-15 01:25:34,072 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:25:34,072 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:25:34,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-15 01:25:34,072 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:25:34,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:25:34,072 INFO L85 PathProgramCache]: Analyzing trace with hash -1156315956, now seen corresponding path program 1 times [2022-02-15 01:25:34,073 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:25:34,073 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [98866434] [2022-02-15 01:25:34,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:25:34,084 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:25:34,085 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:25:34,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:25:34,086 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:25:34,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:25:34,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:25:34,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:25:34,131 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 01:25:34,131 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:25:34,131 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [98866434] [2022-02-15 01:25:34,132 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [98866434] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:25:34,132 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:25:34,132 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-15 01:25:34,132 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132268324] [2022-02-15 01:25:34,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:25:34,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-15 01:25:34,132 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:25:34,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-15 01:25:34,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-15 01:25:34,133 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 5 states, 5 states have (on average 2.4) 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) [2022-02-15 01:25:34,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:25:34,206 INFO L93 Difference]: Finished difference Result 45 states and 53 transitions. [2022-02-15 01:25:34,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-15 01:25:34,206 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) 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 [2022-02-15 01:25:34,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:25:34,207 INFO L225 Difference]: With dead ends: 45 [2022-02-15 01:25:34,207 INFO L226 Difference]: Without dead ends: 32 [2022-02-15 01:25:34,208 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-02-15 01:25:34,208 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 34 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 01:25:34,209 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 27 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 01:25:34,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-02-15 01:25:34,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 28. [2022-02-15 01:25:34,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 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 01:25:34,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2022-02-15 01:25:34,216 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 16 [2022-02-15 01:25:34,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:25:34,216 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2022-02-15 01:25:34,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) 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) [2022-02-15 01:25:34,222 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2022-02-15 01:25:34,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-15 01:25:34,222 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:25:34,222 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:25:34,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-15 01:25:34,223 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:25:34,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:25:34,223 INFO L85 PathProgramCache]: Analyzing trace with hash 1341094446, now seen corresponding path program 2 times [2022-02-15 01:25:34,223 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:25:34,224 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1483229113] [2022-02-15 01:25:34,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:25:34,226 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:25:34,226 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:25:34,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:25:34,228 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:25:34,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:25:34,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:25:34,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:25:34,313 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 01:25:34,313 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:25:34,313 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1483229113] [2022-02-15 01:25:34,314 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1483229113] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:25:34,314 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:25:34,315 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-15 01:25:34,315 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903861027] [2022-02-15 01:25:34,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:25:34,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-15 01:25:34,316 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:25:34,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-15 01:25:34,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-02-15 01:25:34,317 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. 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) [2022-02-15 01:25:34,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:25:34,400 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2022-02-15 01:25:34,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-15 01:25:34,400 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 18 [2022-02-15 01:25:34,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:25:34,401 INFO L225 Difference]: With dead ends: 33 [2022-02-15 01:25:34,401 INFO L226 Difference]: Without dead ends: 28 [2022-02-15 01:25:34,401 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-02-15 01:25:34,402 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 22 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:25:34,403 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 31 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:25:34,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-02-15 01:25:34,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-02-15 01:25:34,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 states have internal predecessors, (27), 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 01:25:34,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2022-02-15 01:25:34,408 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 18 [2022-02-15 01:25:34,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:25:34,409 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2022-02-15 01:25:34,409 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) [2022-02-15 01:25:34,409 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2022-02-15 01:25:34,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-15 01:25:34,409 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:25:34,409 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:25:34,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-15 01:25:34,409 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:25:34,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:25:34,410 INFO L85 PathProgramCache]: Analyzing trace with hash -746180299, now seen corresponding path program 1 times [2022-02-15 01:25:34,410 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:25:34,410 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1416165743] [2022-02-15 01:25:34,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:25:34,412 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:25:34,413 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:25:34,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:25:34,414 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:25:34,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:25:34,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:25:34,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:25:34,490 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 01:25:34,491 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:25:34,491 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1416165743] [2022-02-15 01:25:34,491 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1416165743] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:25:34,491 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:25:34,491 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-15 01:25:34,491 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235463569] [2022-02-15 01:25:34,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:25:34,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-15 01:25:34,492 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:25:34,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-15 01:25:34,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-02-15 01:25:34,492 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 5 states have internal predecessors, (16), 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 01:25:34,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:25:34,585 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2022-02-15 01:25:34,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-15 01:25:34,586 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 5 states have internal predecessors, (16), 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 22 [2022-02-15 01:25:34,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:25:34,590 INFO L225 Difference]: With dead ends: 35 [2022-02-15 01:25:34,590 INFO L226 Difference]: Without dead ends: 30 [2022-02-15 01:25:34,595 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-02-15 01:25:34,597 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 32 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 01:25:34,597 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 31 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 01:25:34,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-02-15 01:25:34,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2022-02-15 01:25:34,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 states have internal predecessors, (26), 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 01:25:34,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2022-02-15 01:25:34,602 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 22 [2022-02-15 01:25:34,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:25:34,602 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2022-02-15 01:25:34,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 5 states have internal predecessors, (16), 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 01:25:34,602 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2022-02-15 01:25:34,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-15 01:25:34,603 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:25:34,603 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:25:34,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-02-15 01:25:34,603 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:25:34,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:25:34,603 INFO L85 PathProgramCache]: Analyzing trace with hash -1353970500, now seen corresponding path program 2 times [2022-02-15 01:25:34,604 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:25:34,604 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [303247032] [2022-02-15 01:25:34,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:25:34,609 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:25:34,609 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:25:34,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:25:34,610 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:25:34,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:25:34,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:25:34,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:25:34,688 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 01:25:34,688 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:25:34,688 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [303247032] [2022-02-15 01:25:34,689 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [303247032] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:25:34,689 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:25:34,689 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-15 01:25:34,689 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427070791] [2022-02-15 01:25:34,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:25:34,689 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-15 01:25:34,689 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:25:34,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-15 01:25:34,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-02-15 01:25:34,690 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 5 states have internal predecessors, (18), 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 01:25:34,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:25:34,766 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2022-02-15 01:25:34,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-15 01:25:34,766 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 5 states have internal predecessors, (18), 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 26 [2022-02-15 01:25:34,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:25:34,768 INFO L225 Difference]: With dead ends: 28 [2022-02-15 01:25:34,768 INFO L226 Difference]: Without dead ends: 0 [2022-02-15 01:25:34,769 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-02-15 01:25:34,773 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 24 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 01:25:34,778 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 33 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 01:25:34,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-02-15 01:25:34,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-02-15 01:25:34,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 01:25:34,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-02-15 01:25:34,781 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 26 [2022-02-15 01:25:34,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:25:34,781 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-02-15 01:25:34,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 5 states have internal predecessors, (18), 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 01:25:34,781 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-02-15 01:25:34,781 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-02-15 01:25:34,783 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-02-15 01:25:34,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-02-15 01:25:34,793 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-02-15 01:25:34,898 INFO L858 garLoopResultBuilder]: For program point reach_errorEXIT(line 12) no Hoare annotation was computed. [2022-02-15 01:25:34,898 INFO L858 garLoopResultBuilder]: For program point reach_errorENTRY(line 12) no Hoare annotation was computed. [2022-02-15 01:25:34,898 INFO L858 garLoopResultBuilder]: For program point L12-1(line 12) no Hoare annotation was computed. [2022-02-15 01:25:34,898 INFO L861 garLoopResultBuilder]: At program point L33(line 33) the Hoare annotation is: true [2022-02-15 01:25:34,898 INFO L854 garLoopResultBuilder]: At program point L29(lines 29 31) the Hoare annotation is: (<= main_~i~0 1023) [2022-02-15 01:25:34,899 INFO L861 garLoopResultBuilder]: At program point mainEXIT(lines 20 34) the Hoare annotation is: true [2022-02-15 01:25:34,899 INFO L861 garLoopResultBuilder]: At program point mainFINAL(lines 20 34) the Hoare annotation is: true [2022-02-15 01:25:34,899 INFO L861 garLoopResultBuilder]: At program point mainENTRY(lines 20 34) the Hoare annotation is: true [2022-02-15 01:25:34,899 INFO L854 garLoopResultBuilder]: At program point L28-1(lines 28 32) the Hoare annotation is: (<= main_~i~0 1023) [2022-02-15 01:25:34,899 INFO L854 garLoopResultBuilder]: At program point L28-3(lines 28 32) the Hoare annotation is: (<= main_~i~0 1022) [2022-02-15 01:25:34,899 INFO L854 garLoopResultBuilder]: At program point L28-4(lines 28 32) the Hoare annotation is: (<= main_~i~0 1023) [2022-02-15 01:25:34,899 INFO L854 garLoopResultBuilder]: At program point L28-5(lines 28 32) the Hoare annotation is: (<= main_~i~0 1024) [2022-02-15 01:25:34,899 INFO L854 garLoopResultBuilder]: At program point L24-2(lines 24 26) the Hoare annotation is: (<= main_~i~0 1023) [2022-02-15 01:25:34,899 INFO L861 garLoopResultBuilder]: At program point L24-3(lines 24 26) the Hoare annotation is: true [2022-02-15 01:25:34,899 INFO L861 garLoopResultBuilder]: At program point L24-4(lines 24 26) the Hoare annotation is: true [2022-02-15 01:25:34,899 INFO L861 garLoopResultBuilder]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2022-02-15 01:25:34,900 INFO L854 garLoopResultBuilder]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|)) [2022-02-15 01:25:34,900 INFO L861 garLoopResultBuilder]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2022-02-15 01:25:34,900 INFO L861 garLoopResultBuilder]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2022-02-15 01:25:34,901 INFO L861 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-02-15 01:25:34,901 INFO L861 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-02-15 01:25:34,901 INFO L861 garLoopResultBuilder]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2022-02-15 01:25:34,901 INFO L854 garLoopResultBuilder]: At program point L16(line 16) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2022-02-15 01:25:34,901 INFO L854 garLoopResultBuilder]: At program point L15(lines 15 17) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2022-02-15 01:25:34,901 INFO L861 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 14 19) the Hoare annotation is: true [2022-02-15 01:25:34,901 INFO L861 garLoopResultBuilder]: At program point L15-2(lines 14 19) the Hoare annotation is: true [2022-02-15 01:25:34,901 INFO L861 garLoopResultBuilder]: At program point __VERIFIER_assertEXIT(lines 14 19) the Hoare annotation is: true [2022-02-15 01:25:34,901 INFO L854 garLoopResultBuilder]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 16) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2022-02-15 01:25:34,907 INFO L732 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1] [2022-02-15 01:25:34,909 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-02-15 01:25:34,920 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.02 01:25:34 BoogieIcfgContainer [2022-02-15 01:25:34,921 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-15 01:25:34,922 INFO L158 Benchmark]: Toolchain (without parser) took 1765.14ms. Allocated memory was 199.2MB in the beginning and 250.6MB in the end (delta: 51.4MB). Free memory was 149.8MB in the beginning and 193.1MB in the end (delta: -43.2MB). Peak memory consumption was 8.6MB. Max. memory is 8.0GB. [2022-02-15 01:25:34,922 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 199.2MB. Free memory is still 166.0MB. There was no memory consumed. Max. memory is 8.0GB. [2022-02-15 01:25:34,923 INFO L158 Benchmark]: CACSL2BoogieTranslator took 152.53ms. Allocated memory is still 199.2MB. Free memory was 149.6MB in the beginning and 175.9MB in the end (delta: -26.4MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-02-15 01:25:34,923 INFO L158 Benchmark]: Boogie Preprocessor took 17.66ms. Allocated memory is still 199.2MB. Free memory was 175.9MB in the beginning and 174.4MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-02-15 01:25:34,923 INFO L158 Benchmark]: RCFGBuilder took 173.31ms. Allocated memory is still 199.2MB. Free memory was 174.4MB in the beginning and 163.9MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-02-15 01:25:34,923 INFO L158 Benchmark]: TraceAbstraction took 1416.92ms. Allocated memory was 199.2MB in the beginning and 250.6MB in the end (delta: 51.4MB). Free memory was 163.4MB in the beginning and 193.1MB in the end (delta: -29.6MB). Peak memory consumption was 22.2MB. Max. memory is 8.0GB. [2022-02-15 01:25:34,925 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 199.2MB. Free memory is still 166.0MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 152.53ms. Allocated memory is still 199.2MB. Free memory was 149.6MB in the beginning and 175.9MB in the end (delta: -26.4MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 17.66ms. Allocated memory is still 199.2MB. Free memory was 175.9MB in the beginning and 174.4MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 173.31ms. Allocated memory is still 199.2MB. Free memory was 174.4MB in the beginning and 163.9MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * TraceAbstraction took 1416.92ms. Allocated memory was 199.2MB in the beginning and 250.6MB in the end (delta: 51.4MB). Free memory was 163.4MB in the beginning and 193.1MB in the end (delta: -29.6MB). Peak memory consumption was 22.2MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 16]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 28 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 1.3s, OverallIterations: 6, TraceHistogramMax: 3, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 155 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 154 mSDsluCounter, 173 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 78 mSDsCounter, 49 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 204 IncrementalHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 49 mSolverCounterUnsat, 95 mSDtfsCounter, 204 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 56 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=28occurred in iteration=3, InterpolantAutomatonStates: 32, 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, 6 MinimizatonAttempts, 9 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 25 LocationsWithAnnotation, 55 PreInvPairs, 88 NumberOfFragments, 54 HoareAnnotationTreeSize, 55 FomulaSimplifications, 54 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 25 FomulaSimplificationsInter, 57 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 28]: Loop Invariant Derived loop invariant: i <= 1023 - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: 1 - ProcedureContractResult [Line: 20]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 14]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: 1 RESULT: Ultimate proved your program to be correct! [2022-02-15 01:25:34,959 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...