/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/underapprox_2-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 20:53:17,215 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 20:53:17,216 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 20:53:17,252 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-31 20:53:17,267 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 20:53:17,268 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 20:53:17,269 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 20:53:17,269 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 20:53:17,270 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 20:53:17,311 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 20:53:17,315 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 20:53:17,320 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 20:53:17,321 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 20:53:17,324 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 20:53:17,325 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 20:53:17,326 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 20:53:17,328 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 20:53:17,340 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 20:53:17,341 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 20:53:17,341 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 20:53:17,344 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 20:53:17,357 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 20:53:17,357 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 20:53:17,359 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 20:53:17,359 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 20:53:17,359 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 20:53:17,359 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 20:53:17,359 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 20:53:17,359 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 20:53:17,359 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 20:53:17,359 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 20:53:17,360 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 20:53:17,360 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 20:53:17,361 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 20:53:17,361 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 20:53:17,361 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 20:53:17,361 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 20:53:17,361 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 20:53:17,361 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 20:53:17,361 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 20:53:17,361 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 20:53:17,362 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-01-31 20:53:17,362 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-31 20:53:17,362 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-01-31 20:53:17,362 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 20:53:17,581 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 20:53:17,599 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 20:53:17,601 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 20:53:17,602 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 20:53:17,604 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 20:53:17,605 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/underapprox_2-2.c [2022-01-31 20:53:17,653 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/47ddd0b82/e0fbab3f9b9a4c9ebfc81a8184689d4e/FLAGa2a1af834 [2022-01-31 20:53:18,066 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 20:53:18,066 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/underapprox_2-2.c [2022-01-31 20:53:18,074 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/47ddd0b82/e0fbab3f9b9a4c9ebfc81a8184689d4e/FLAGa2a1af834 [2022-01-31 20:53:18,091 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/47ddd0b82/e0fbab3f9b9a4c9ebfc81a8184689d4e [2022-01-31 20:53:18,094 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 20:53:18,096 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-31 20:53:18,098 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 20:53:18,098 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 20:53:18,101 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 20:53:18,102 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 08:53:18" (1/1) ... [2022-01-31 20:53:18,103 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7aaebdd5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:53:18, skipping insertion in model container [2022-01-31 20:53:18,103 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 08:53:18" (1/1) ... [2022-01-31 20:53:18,109 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 20:53:18,120 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 20:53:18,259 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/underapprox_2-2.c[327,340] [2022-01-31 20:53:18,283 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 20:53:18,299 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 20:53:18,311 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/underapprox_2-2.c[327,340] [2022-01-31 20:53:18,313 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 20:53:18,323 INFO L208 MainTranslator]: Completed translation [2022-01-31 20:53:18,323 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:53:18 WrapperNode [2022-01-31 20:53:18,324 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 20:53:18,324 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 20:53:18,325 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 20:53:18,325 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 20:53:18,334 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:53:18" (1/1) ... [2022-01-31 20:53:18,335 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:53:18" (1/1) ... [2022-01-31 20:53:18,341 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:53:18" (1/1) ... [2022-01-31 20:53:18,342 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:53:18" (1/1) ... [2022-01-31 20:53:18,346 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:53:18" (1/1) ... [2022-01-31 20:53:18,349 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:53:18" (1/1) ... [2022-01-31 20:53:18,356 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:53:18" (1/1) ... [2022-01-31 20:53:18,359 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 20:53:18,360 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 20:53:18,360 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 20:53:18,360 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 20:53:18,361 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:53:18" (1/1) ... [2022-01-31 20:53:18,370 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 20:53:18,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 20:53:18,400 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 20:53:18,411 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 20:53:18,437 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 20:53:18,438 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 20:53:18,438 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 20:53:18,438 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 20:53:18,438 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 20:53:18,438 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 20:53:18,439 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 20:53:18,439 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 20:53:18,439 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 20:53:18,439 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 20:53:18,439 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 20:53:18,439 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 20:53:18,439 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 20:53:18,440 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 20:53:18,440 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 20:53:18,441 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 20:53:18,441 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 20:53:18,497 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 20:53:18,498 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 20:53:18,606 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 20:53:18,610 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 20:53:18,610 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-01-31 20:53:18,611 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 08:53:18 BoogieIcfgContainer [2022-01-31 20:53:18,612 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 20:53:18,613 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 20:53:18,613 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 20:53:18,616 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 20:53:18,616 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 08:53:18" (1/3) ... [2022-01-31 20:53:18,620 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4245c96e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 08:53:18, skipping insertion in model container [2022-01-31 20:53:18,620 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:53:18" (2/3) ... [2022-01-31 20:53:18,621 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4245c96e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 08:53:18, skipping insertion in model container [2022-01-31 20:53:18,621 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 08:53:18" (3/3) ... [2022-01-31 20:53:18,623 INFO L111 eAbstractionObserver]: Analyzing ICFG underapprox_2-2.c [2022-01-31 20:53:18,627 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-01-31 20:53:18,627 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 20:53:18,673 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 20:53:18,681 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 20:53:18,682 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 20:53:18,695 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 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 20:53:18,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-01-31 20:53:18,702 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:53:18,702 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:53:18,703 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:53:18,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:53:18,709 INFO L85 PathProgramCache]: Analyzing trace with hash -219174432, now seen corresponding path program 1 times [2022-01-31 20:53:18,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:53:18,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1764193978] [2022-01-31 20:53:18,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:53:18,728 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:53:18,767 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:53:18,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:53:18,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:53:18,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:53:18,894 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 20:53:18,895 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:53:18,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1764193978] [2022-01-31 20:53:18,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1764193978] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:53:18,897 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:53:18,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 20:53:18,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085341357] [2022-01-31 20:53:18,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:53:18,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 20:53:18,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:53:18,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 20:53:18,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 20:53:18,947 INFO L87 Difference]: Start difference. First operand has 18 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 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 20:53:18,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:53:18,992 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2022-01-31 20:53:18,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 20:53:18,996 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 20:53:18,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:53:19,001 INFO L225 Difference]: With dead ends: 29 [2022-01-31 20:53:19,001 INFO L226 Difference]: Without dead ends: 12 [2022-01-31 20:53:19,004 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 20:53:19,010 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 9 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 20 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 20:53:19,012 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 20 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 20:53:19,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2022-01-31 20:53:19,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2022-01-31 20:53:19,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 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 20:53:19,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2022-01-31 20:53:19,047 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 11 [2022-01-31 20:53:19,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:53:19,048 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2022-01-31 20:53:19,048 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 20:53:19,048 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2022-01-31 20:53:19,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-01-31 20:53:19,049 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:53:19,050 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:53:19,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 20:53:19,051 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:53:19,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:53:19,051 INFO L85 PathProgramCache]: Analyzing trace with hash -222868516, now seen corresponding path program 1 times [2022-01-31 20:53:19,051 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:53:19,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1001413402] [2022-01-31 20:53:19,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:53:19,053 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:53:19,056 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:53:19,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:53:19,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:53:19,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:53:19,193 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 20:53:19,193 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:53:19,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1001413402] [2022-01-31 20:53:19,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1001413402] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:53:19,194 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:53:19,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 20:53:19,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405772101] [2022-01-31 20:53:19,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:53:19,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 20:53:19,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:53:19,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 20:53:19,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 20:53:19,196 INFO L87 Difference]: Start difference. First operand 12 states and 12 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 20:53:19,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:53:19,224 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2022-01-31 20:53:19,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 20:53:19,225 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 20:53:19,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:53:19,225 INFO L225 Difference]: With dead ends: 18 [2022-01-31 20:53:19,226 INFO L226 Difference]: Without dead ends: 13 [2022-01-31 20:53:19,226 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 20:53:19,227 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 6 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 20:53:19,229 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 18 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 20:53:19,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-01-31 20:53:19,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2022-01-31 20:53:19,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 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 20:53:19,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2022-01-31 20:53:19,233 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2022-01-31 20:53:19,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:53:19,233 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2022-01-31 20:53:19,234 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 20:53:19,234 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2022-01-31 20:53:19,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-01-31 20:53:19,234 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:53:19,234 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:53:19,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 20:53:19,235 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:53:19,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:53:19,235 INFO L85 PathProgramCache]: Analyzing trace with hash 1717471862, now seen corresponding path program 1 times [2022-01-31 20:53:19,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:53:19,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1965449592] [2022-01-31 20:53:19,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:53:19,257 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:53:19,266 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-01-31 20:53:19,267 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:53:19,271 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:53:19,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:53:19,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:53:19,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:53:19,359 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 20:53:19,359 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:53:19,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1965449592] [2022-01-31 20:53:19,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1965449592] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:53:19,360 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:53:19,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 20:53:19,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170768625] [2022-01-31 20:53:19,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:53:19,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 20:53:19,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:53:19,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 20:53:19,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 20:53:19,362 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:53:19,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:53:19,404 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2022-01-31 20:53:19,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 20:53:19,404 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-01-31 20:53:19,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:53:19,405 INFO L225 Difference]: With dead ends: 19 [2022-01-31 20:53:19,405 INFO L226 Difference]: Without dead ends: 14 [2022-01-31 20:53:19,405 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-31 20:53:19,406 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 6 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 20:53:19,407 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 23 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 20:53:19,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-01-31 20:53:19,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-01-31 20:53:19,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 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 20:53:19,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2022-01-31 20:53:19,411 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2022-01-31 20:53:19,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:53:19,411 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2022-01-31 20:53:19,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:53:19,411 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2022-01-31 20:53:19,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-01-31 20:53:19,412 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:53:19,412 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:53:19,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-31 20:53:19,412 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:53:19,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:53:19,412 INFO L85 PathProgramCache]: Analyzing trace with hash 1738481436, now seen corresponding path program 2 times [2022-01-31 20:53:19,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:53:19,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [811858522] [2022-01-31 20:53:19,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:53:19,415 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:53:19,415 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-01-31 20:53:19,415 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:53:19,416 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:53:19,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:53:19,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:53:19,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:53:19,518 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 20:53:19,518 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:53:19,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [811858522] [2022-01-31 20:53:19,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [811858522] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:53:19,519 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:53:19,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 20:53:19,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87838148] [2022-01-31 20:53:19,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:53:19,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 20:53:19,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:53:19,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 20:53:19,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-31 20:53:19,520 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 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 20:53:19,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:53:19,575 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2022-01-31 20:53:19,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 20:53:19,576 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 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 20:53:19,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:53:19,576 INFO L225 Difference]: With dead ends: 20 [2022-01-31 20:53:19,577 INFO L226 Difference]: Without dead ends: 15 [2022-01-31 20:53:19,577 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-01-31 20:53:19,578 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 6 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 20:53:19,579 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 18 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 20:53:19,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-01-31 20:53:19,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-01-31 20:53:19,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 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 20:53:19,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2022-01-31 20:53:19,583 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2022-01-31 20:53:19,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:53:19,583 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2022-01-31 20:53:19,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 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 20:53:19,584 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2022-01-31 20:53:19,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-31 20:53:19,584 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:53:19,584 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:53:19,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-31 20:53:19,584 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:53:19,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:53:19,585 INFO L85 PathProgramCache]: Analyzing trace with hash -1905189066, now seen corresponding path program 3 times [2022-01-31 20:53:19,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:53:19,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [17955638] [2022-01-31 20:53:19,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:53:19,587 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:53:19,587 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-01-31 20:53:19,587 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:53:19,588 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:53:19,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:53:19,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:53:19,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:53:19,691 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 20:53:19,691 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:53:19,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [17955638] [2022-01-31 20:53:19,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [17955638] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:53:19,692 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:53:19,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-31 20:53:19,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886063091] [2022-01-31 20:53:19,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:53:19,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-31 20:53:19,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:53:19,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-31 20:53:19,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-01-31 20:53:19,693 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 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) [2022-01-31 20:53:19,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:53:19,770 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2022-01-31 20:53:19,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 20:53:19,770 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 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 [2022-01-31 20:53:19,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:53:19,771 INFO L225 Difference]: With dead ends: 21 [2022-01-31 20:53:19,771 INFO L226 Difference]: Without dead ends: 16 [2022-01-31 20:53:19,772 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-01-31 20:53:19,773 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 6 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 20:53:19,773 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 28 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 20:53:19,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-01-31 20:53:19,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-01-31 20:53:19,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 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 20:53:19,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2022-01-31 20:53:19,778 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2022-01-31 20:53:19,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:53:19,778 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2022-01-31 20:53:19,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 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) [2022-01-31 20:53:19,779 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2022-01-31 20:53:19,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-31 20:53:19,779 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:53:19,779 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:53:19,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-31 20:53:19,779 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:53:19,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:53:19,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1105142364, now seen corresponding path program 4 times [2022-01-31 20:53:19,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:53:19,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [895144163] [2022-01-31 20:53:19,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:53:19,782 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:53:19,782 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-01-31 20:53:19,782 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:53:19,784 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:53:19,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:53:19,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:53:19,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:53:19,889 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 20:53:19,889 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:53:19,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [895144163] [2022-01-31 20:53:19,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [895144163] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:53:19,889 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:53:19,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-31 20:53:19,889 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747146132] [2022-01-31 20:53:19,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:53:19,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 20:53:19,890 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:53:19,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 20:53:19,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-01-31 20:53:19,893 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand has 8 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:53:19,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:53:19,999 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2022-01-31 20:53:19,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 20:53:19,999 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-01-31 20:53:19,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:53:20,000 INFO L225 Difference]: With dead ends: 22 [2022-01-31 20:53:20,001 INFO L226 Difference]: Without dead ends: 17 [2022-01-31 20:53:20,002 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2022-01-31 20:53:20,012 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 6 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 20:53:20,014 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 28 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 20:53:20,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-01-31 20:53:20,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-01-31 20:53:20,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 12 states have internal predecessors, (13), 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 20:53:20,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2022-01-31 20:53:20,021 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2022-01-31 20:53:20,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:53:20,021 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2022-01-31 20:53:20,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:53:20,021 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2022-01-31 20:53:20,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-31 20:53:20,022 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:53:20,022 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:53:20,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-31 20:53:20,022 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:53:20,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:53:20,023 INFO L85 PathProgramCache]: Analyzing trace with hash -63863818, now seen corresponding path program 5 times [2022-01-31 20:53:20,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:53:20,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1603029513] [2022-01-31 20:53:20,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:53:20,025 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:53:20,025 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-01-31 20:53:20,025 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:53:20,026 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:53:20,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:53:20,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:53:20,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:53:20,198 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 20:53:20,198 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:53:20,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1603029513] [2022-01-31 20:53:20,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1603029513] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:53:20,199 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:53:20,199 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-01-31 20:53:20,199 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191609153] [2022-01-31 20:53:20,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:53:20,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 20:53:20,200 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:53:20,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 20:53:20,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-01-31 20:53:20,200 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand has 9 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 8 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) [2022-01-31 20:53:20,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:53:20,300 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2022-01-31 20:53:20,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-31 20:53:20,301 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 8 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 [2022-01-31 20:53:20,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:53:20,302 INFO L225 Difference]: With dead ends: 23 [2022-01-31 20:53:20,302 INFO L226 Difference]: Without dead ends: 18 [2022-01-31 20:53:20,302 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2022-01-31 20:53:20,306 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 6 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 20:53:20,306 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 28 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 20:53:20,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-01-31 20:53:20,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-01-31 20:53:20,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 13 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:53:20,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2022-01-31 20:53:20,310 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2022-01-31 20:53:20,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:53:20,311 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2022-01-31 20:53:20,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 8 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) [2022-01-31 20:53:20,323 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2022-01-31 20:53:20,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-31 20:53:20,324 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:53:20,324 INFO L514 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:53:20,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-31 20:53:20,324 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:53:20,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:53:20,325 INFO L85 PathProgramCache]: Analyzing trace with hash -1943317092, now seen corresponding path program 6 times [2022-01-31 20:53:20,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:53:20,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [374619045] [2022-01-31 20:53:20,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:53:20,327 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:53:20,327 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-01-31 20:53:20,327 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:53:20,328 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:53:20,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:53:20,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:53:20,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:53:20,530 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 20:53:20,530 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:53:20,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [374619045] [2022-01-31 20:53:20,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [374619045] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:53:20,531 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:53:20,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-01-31 20:53:20,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809286402] [2022-01-31 20:53:20,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:53:20,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-31 20:53:20,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:53:20,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-31 20:53:20,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2022-01-31 20:53:20,533 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand has 13 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 11 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:53:20,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:53:20,699 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2022-01-31 20:53:20,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-31 20:53:20,699 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 11 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-01-31 20:53:20,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:53:20,700 INFO L225 Difference]: With dead ends: 22 [2022-01-31 20:53:20,700 INFO L226 Difference]: Without dead ends: 0 [2022-01-31 20:53:20,700 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2022-01-31 20:53:20,701 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 5 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:53:20,701 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 49 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 20:53:20,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-01-31 20:53:20,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-01-31 20:53:20,702 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) [2022-01-31 20:53:20,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-01-31 20:53:20,702 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 17 [2022-01-31 20:53:20,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:53:20,702 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-01-31 20:53:20,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 11 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:53:20,702 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-01-31 20:53:20,703 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-01-31 20:53:20,705 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-01-31 20:53:20,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-31 20:53:20,707 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-01-31 20:53:20,798 INFO L858 garLoopResultBuilder]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2022-01-31 20:53:20,798 INFO L858 garLoopResultBuilder]: For program point reach_errorENTRY(line 3) no Hoare annotation was computed. [2022-01-31 20:53:20,798 INFO L858 garLoopResultBuilder]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2022-01-31 20:53:20,798 INFO L861 garLoopResultBuilder]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2022-01-31 20:53:20,798 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|)) [2022-01-31 20:53:20,799 INFO L861 garLoopResultBuilder]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2022-01-31 20:53:20,799 INFO L861 garLoopResultBuilder]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2022-01-31 20:53:20,799 INFO L861 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-01-31 20:53:20,799 INFO L861 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-01-31 20:53:20,799 INFO L861 garLoopResultBuilder]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2022-01-31 20:53:20,799 INFO L861 garLoopResultBuilder]: At program point mainENTRY(lines 12 22) the Hoare annotation is: true [2022-01-31 20:53:20,799 INFO L861 garLoopResultBuilder]: At program point mainEXIT(lines 12 22) the Hoare annotation is: true [2022-01-31 20:53:20,800 INFO L854 garLoopResultBuilder]: At program point L16-2(lines 16 19) the Hoare annotation is: (let ((.cse2 (div main_~x~0 4294967296))) (let ((.cse0 (+ .cse2 1))) (or (and (not (<= .cse0 0)) (<= main_~x~0 5)) (let ((.cse1 (* 4294967296 .cse2))) (and (<= main_~x~0 (+ 6 .cse1)) (< (+ 5 .cse1) main_~x~0) (< 0 .cse0)))))) [2022-01-31 20:53:20,800 INFO L854 garLoopResultBuilder]: At program point L16-3(lines 16 19) the Hoare annotation is: (let ((.cse1 (div main_~x~0 4294967296))) (let ((.cse0 (* 4294967296 .cse1))) (and (<= main_~x~0 (+ 6 .cse0)) (< (+ 5 .cse0) main_~x~0) (< 0 (+ .cse1 1))))) [2022-01-31 20:53:20,800 INFO L861 garLoopResultBuilder]: At program point mainFINAL(lines 12 22) the Hoare annotation is: true [2022-01-31 20:53:20,800 INFO L861 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 5 10) the Hoare annotation is: true [2022-01-31 20:53:20,800 INFO L861 garLoopResultBuilder]: At program point __VERIFIER_assertEXIT(lines 5 10) the Hoare annotation is: true [2022-01-31 20:53:20,800 INFO L854 garLoopResultBuilder]: At program point L7(line 7) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2022-01-31 20:53:20,801 INFO L854 garLoopResultBuilder]: At program point L6(lines 6 8) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2022-01-31 20:53:20,801 INFO L861 garLoopResultBuilder]: At program point L6-2(lines 5 10) the Hoare annotation is: true [2022-01-31 20:53:20,801 INFO L854 garLoopResultBuilder]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 7) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2022-01-31 20:53:20,804 INFO L732 BasicCegarLoop]: Path program histogram: [6, 1, 1] [2022-01-31 20:53:20,807 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-01-31 20:53:20,821 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 08:53:20 BoogieIcfgContainer [2022-01-31 20:53:20,821 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-31 20:53:20,822 INFO L158 Benchmark]: Toolchain (without parser) took 2725.89ms. Allocated memory was 181.4MB in the beginning and 218.1MB in the end (delta: 36.7MB). Free memory was 134.5MB in the beginning and 164.7MB in the end (delta: -30.2MB). Peak memory consumption was 6.4MB. Max. memory is 8.0GB. [2022-01-31 20:53:20,822 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 181.4MB. Free memory is still 150.7MB. There was no memory consumed. Max. memory is 8.0GB. [2022-01-31 20:53:20,823 INFO L158 Benchmark]: CACSL2BoogieTranslator took 226.19ms. Allocated memory is still 181.4MB. Free memory was 134.3MB in the beginning and 159.4MB in the end (delta: -25.1MB). Peak memory consumption was 8.4MB. Max. memory is 8.0GB. [2022-01-31 20:53:20,823 INFO L158 Benchmark]: Boogie Preprocessor took 34.55ms. Allocated memory is still 181.4MB. Free memory was 159.4MB in the beginning and 158.3MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-01-31 20:53:20,823 INFO L158 Benchmark]: RCFGBuilder took 251.95ms. Allocated memory is still 181.4MB. Free memory was 158.3MB in the beginning and 148.9MB in the end (delta: 9.4MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-01-31 20:53:20,824 INFO L158 Benchmark]: TraceAbstraction took 2208.28ms. Allocated memory was 181.4MB in the beginning and 218.1MB in the end (delta: 36.7MB). Free memory was 148.3MB in the beginning and 164.7MB in the end (delta: -16.3MB). Peak memory consumption was 20.9MB. Max. memory is 8.0GB. [2022-01-31 20:53:20,826 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 181.4MB. Free memory is still 150.7MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 226.19ms. Allocated memory is still 181.4MB. Free memory was 134.3MB in the beginning and 159.4MB in the end (delta: -25.1MB). Peak memory consumption was 8.4MB. Max. memory is 8.0GB. * Boogie Preprocessor took 34.55ms. Allocated memory is still 181.4MB. Free memory was 159.4MB in the beginning and 158.3MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 251.95ms. Allocated memory is still 181.4MB. Free memory was 158.3MB in the beginning and 148.9MB in the end (delta: 9.4MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * TraceAbstraction took 2208.28ms. Allocated memory was 181.4MB in the beginning and 218.1MB in the end (delta: 36.7MB). Free memory was 148.3MB in the beginning and 164.7MB in the end (delta: -16.3MB). Peak memory consumption was 20.9MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 7]: 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, 21 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 2.1s, OverallIterations: 8, TraceHistogramMax: 6, PathProgramHistogramMax: 6, EmptinessCheckTime: 0.0s, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 51 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 50 mSDsluCounter, 212 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 122 mSDsCounter, 66 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 237 IncrementalHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 66 mSolverCounterUnsat, 90 mSDtfsCounter, 237 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 99 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=18occurred in iteration=0, InterpolantAutomatonStates: 54, 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, 8 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 18 LocationsWithAnnotation, 66 PreInvPairs, 94 NumberOfFragments, 98 HoareAnnotationTreeSize, 66 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 18 FomulaSimplificationsInter, 71 FormulaSimplificationTreeSizeReductionInter, 0.1s 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: 16]: Loop Invariant Derived loop invariant: (!(x / 4294967296 + 1 <= 0) && x <= 5) || ((x <= 6 + 4294967296 * (x / 4294967296) && 5 + 4294967296 * (x / 4294967296) < x) && 0 < x / 4294967296 + 1) - ProcedureContractResult [Line: 12]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 5]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: 1 RESULT: Ultimate proved your program to be correct! [2022-01-31 20:53:20,874 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...