/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_1-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 20:53:09,294 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 20:53:09,295 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 20:53:09,320 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-31 20:53:09,326 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 20:53:09,327 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 20:53:09,327 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 20:53:09,328 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 20:53:09,329 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 20:53:09,329 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 20:53:09,330 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 20:53:09,331 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 20:53:09,332 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 20:53:09,333 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 20:53:09,334 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 20:53:09,335 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 20:53:09,336 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 20:53:09,342 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 20:53:09,342 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 20:53:09,343 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 20:53:09,343 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 20:53:09,385 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 20:53:09,386 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 20:53:09,387 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 20:53:09,388 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 20:53:09,388 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 20:53:09,388 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 20:53:09,388 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 20:53:09,388 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 20:53:09,388 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 20:53:09,388 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 20:53:09,389 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 20:53:09,389 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 20:53:09,389 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 20:53:09,389 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 20:53:09,389 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 20:53:09,389 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 20:53:09,389 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 20:53:09,389 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 20:53:09,389 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 20:53:09,390 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 20:53:09,390 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-01-31 20:53:09,390 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-31 20:53:09,390 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-01-31 20:53:09,390 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 20:53:09,585 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 20:53:09,607 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 20:53:09,609 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 20:53:09,610 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 20:53:09,610 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 20:53:09,611 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/underapprox_1-2.c [2022-01-31 20:53:09,660 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7d72cee00/687e246bd29c4a5cbb8e98249b210b39/FLAG7c5334156 [2022-01-31 20:53:09,977 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 20:53:09,977 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/underapprox_1-2.c [2022-01-31 20:53:09,996 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7d72cee00/687e246bd29c4a5cbb8e98249b210b39/FLAG7c5334156 [2022-01-31 20:53:10,409 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7d72cee00/687e246bd29c4a5cbb8e98249b210b39 [2022-01-31 20:53:10,412 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 20:53:10,413 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-31 20:53:10,415 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 20:53:10,415 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 20:53:10,418 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 20:53:10,421 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 08:53:10" (1/1) ... [2022-01-31 20:53:10,421 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52c8a99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:53:10, skipping insertion in model container [2022-01-31 20:53:10,421 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 08:53:10" (1/1) ... [2022-01-31 20:53:10,427 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 20:53:10,434 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 20:53:10,559 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_1-2.c[327,340] [2022-01-31 20:53:10,601 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 20:53:10,609 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 20:53:10,618 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_1-2.c[327,340] [2022-01-31 20:53:10,626 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 20:53:10,637 INFO L208 MainTranslator]: Completed translation [2022-01-31 20:53:10,638 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:53:10 WrapperNode [2022-01-31 20:53:10,638 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 20:53:10,639 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 20:53:10,639 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 20:53:10,640 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 20:53:10,648 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:53:10" (1/1) ... [2022-01-31 20:53:10,648 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:53:10" (1/1) ... [2022-01-31 20:53:10,653 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:53:10" (1/1) ... [2022-01-31 20:53:10,653 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:53:10" (1/1) ... [2022-01-31 20:53:10,657 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:53:10" (1/1) ... [2022-01-31 20:53:10,659 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:53:10" (1/1) ... [2022-01-31 20:53:10,664 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:53:10" (1/1) ... [2022-01-31 20:53:10,666 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 20:53:10,667 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 20:53:10,667 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 20:53:10,667 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 20:53:10,668 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:53:10" (1/1) ... [2022-01-31 20:53:10,673 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 20:53:10,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 20:53:10,691 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 20:53:10,709 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 20:53:10,725 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 20:53:10,725 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 20:53:10,725 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 20:53:10,725 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 20:53:10,726 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 20:53:10,726 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 20:53:10,726 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 20:53:10,726 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 20:53:10,726 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 20:53:10,726 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 20:53:10,726 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 20:53:10,726 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 20:53:10,727 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 20:53:10,727 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 20:53:10,727 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 20:53:10,728 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 20:53:10,728 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 20:53:10,773 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 20:53:10,775 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 20:53:10,885 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 20:53:10,889 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 20:53:10,889 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-01-31 20:53:10,890 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 08:53:10 BoogieIcfgContainer [2022-01-31 20:53:10,890 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 20:53:10,891 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 20:53:10,891 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 20:53:10,896 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 20:53:10,897 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 08:53:10" (1/3) ... [2022-01-31 20:53:10,897 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67762cba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 08:53:10, skipping insertion in model container [2022-01-31 20:53:10,897 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:53:10" (2/3) ... [2022-01-31 20:53:10,898 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67762cba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 08:53:10, skipping insertion in model container [2022-01-31 20:53:10,898 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 08:53:10" (3/3) ... [2022-01-31 20:53:10,900 INFO L111 eAbstractionObserver]: Analyzing ICFG underapprox_1-2.c [2022-01-31 20:53:10,905 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-01-31 20:53:10,905 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 20:53:10,941 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 20:53:10,948 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 20:53:10,949 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 20:53:10,961 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 20:53:10,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-01-31 20:53:10,974 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:53:10,974 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:53:10,975 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:53:10,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:53:10,979 INFO L85 PathProgramCache]: Analyzing trace with hash -219174432, now seen corresponding path program 1 times [2022-01-31 20:53:10,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:53:10,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [827340188] [2022-01-31 20:53:10,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:53:10,994 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:53:11,027 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:53:11,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:53:11,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:53:11,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:53:11,153 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 20:53:11,154 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:53:11,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [827340188] [2022-01-31 20:53:11,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [827340188] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:53:11,156 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:53:11,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 20:53:11,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408449904] [2022-01-31 20:53:11,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:53:11,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 20:53:11,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:53:11,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 20:53:11,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 20:53:11,178 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 20:53:11,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:53:11,217 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2022-01-31 20:53:11,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 20:53:11,220 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 20:53:11,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:53:11,224 INFO L225 Difference]: With dead ends: 29 [2022-01-31 20:53:11,224 INFO L226 Difference]: Without dead ends: 12 [2022-01-31 20:53:11,226 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 20:53:11,228 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 20:53:11,229 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 20:53:11,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2022-01-31 20:53:11,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2022-01-31 20:53:11,251 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 20:53:11,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2022-01-31 20:53:11,255 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 11 [2022-01-31 20:53:11,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:53:11,256 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2022-01-31 20:53:11,257 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 20:53:11,257 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2022-01-31 20:53:11,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-01-31 20:53:11,257 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:53:11,258 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:53:11,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 20:53:11,258 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:53:11,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:53:11,259 INFO L85 PathProgramCache]: Analyzing trace with hash -222868516, now seen corresponding path program 1 times [2022-01-31 20:53:11,259 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:53:11,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [397633577] [2022-01-31 20:53:11,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:53:11,260 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:53:11,262 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:53:11,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:53:11,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:53:11,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:53:11,318 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 20:53:11,318 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:53:11,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [397633577] [2022-01-31 20:53:11,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [397633577] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:53:11,318 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:53:11,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 20:53:11,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104786063] [2022-01-31 20:53:11,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:53:11,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 20:53:11,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:53:11,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 20:53:11,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 20:53:11,320 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 20:53:11,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:53:11,350 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2022-01-31 20:53:11,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 20:53:11,351 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 20:53:11,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:53:11,351 INFO L225 Difference]: With dead ends: 18 [2022-01-31 20:53:11,351 INFO L226 Difference]: Without dead ends: 13 [2022-01-31 20:53:11,352 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-31 20:53:11,353 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 20:53:11,353 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 20:53:11,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-01-31 20:53:11,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2022-01-31 20:53:11,357 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 20:53:11,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2022-01-31 20:53:11,357 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2022-01-31 20:53:11,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:53:11,358 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2022-01-31 20:53:11,358 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 20:53:11,358 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2022-01-31 20:53:11,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-01-31 20:53:11,358 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:53:11,358 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:53:11,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 20:53:11,359 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:53:11,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:53:11,359 INFO L85 PathProgramCache]: Analyzing trace with hash 1717471862, now seen corresponding path program 1 times [2022-01-31 20:53:11,359 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:53:11,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1221660033] [2022-01-31 20:53:11,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:53:11,372 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:53:11,372 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-01-31 20:53:11,372 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:53:11,374 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:53:11,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:53:11,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:53:11,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:53:11,455 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 20:53:11,455 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:53:11,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1221660033] [2022-01-31 20:53:11,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1221660033] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:53:11,456 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:53:11,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 20:53:11,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394730375] [2022-01-31 20:53:11,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:53:11,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 20:53:11,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:53:11,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 20:53:11,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 20:53:11,457 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 20:53:11,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:53:11,499 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2022-01-31 20:53:11,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 20:53:11,499 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 20:53:11,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:53:11,500 INFO L225 Difference]: With dead ends: 19 [2022-01-31 20:53:11,500 INFO L226 Difference]: Without dead ends: 14 [2022-01-31 20:53:11,500 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-31 20:53:11,501 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 20:53:11,501 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 20:53:11,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-01-31 20:53:11,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-01-31 20:53:11,504 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 20:53:11,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2022-01-31 20:53:11,505 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2022-01-31 20:53:11,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:53:11,505 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2022-01-31 20:53:11,505 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 20:53:11,505 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2022-01-31 20:53:11,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-01-31 20:53:11,506 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:53:11,506 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:53:11,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-31 20:53:11,506 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:53:11,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:53:11,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1738481436, now seen corresponding path program 2 times [2022-01-31 20:53:11,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:53:11,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1618967047] [2022-01-31 20:53:11,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:53:11,524 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:53:11,524 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-01-31 20:53:11,525 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:53:11,526 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:53:11,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:53:11,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:53:11,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:53:11,653 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 20:53:11,653 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:53:11,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1618967047] [2022-01-31 20:53:11,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1618967047] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:53:11,653 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:53:11,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 20:53:11,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886063091] [2022-01-31 20:53:11,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:53:11,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 20:53:11,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:53:11,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 20:53:11,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-31 20:53:11,655 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 20:53:11,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:53:11,706 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2022-01-31 20:53:11,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 20:53:11,707 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 20:53:11,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:53:11,707 INFO L225 Difference]: With dead ends: 20 [2022-01-31 20:53:11,707 INFO L226 Difference]: Without dead ends: 15 [2022-01-31 20:53:11,708 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 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 20:53:11,709 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 20:53:11,709 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 20:53:11,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-01-31 20:53:11,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-01-31 20:53:11,713 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 20:53:11,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2022-01-31 20:53:11,713 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2022-01-31 20:53:11,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:53:11,713 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2022-01-31 20:53:11,714 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 20:53:11,714 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2022-01-31 20:53:11,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-31 20:53:11,714 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:53:11,714 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:53:11,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-31 20:53:11,714 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:53:11,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:53:11,715 INFO L85 PathProgramCache]: Analyzing trace with hash -1905189066, now seen corresponding path program 3 times [2022-01-31 20:53:11,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:53:11,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2080694643] [2022-01-31 20:53:11,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:53:11,717 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:53:11,717 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-01-31 20:53:11,717 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:53:11,718 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:53:11,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:53:11,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:53:11,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:53:11,817 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 20:53:11,818 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:53:11,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2080694643] [2022-01-31 20:53:11,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2080694643] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:53:11,818 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:53:11,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-31 20:53:11,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69806409] [2022-01-31 20:53:11,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:53:11,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-31 20:53:11,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:53:11,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-31 20:53:11,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-01-31 20:53:11,820 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 20:53:11,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:53:11,901 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2022-01-31 20:53:11,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 20:53:11,902 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 20:53:11,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:53:11,903 INFO L225 Difference]: With dead ends: 21 [2022-01-31 20:53:11,903 INFO L226 Difference]: Without dead ends: 16 [2022-01-31 20:53:11,903 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 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 20:53:11,905 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 20:53:11,905 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 20:53:11,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-01-31 20:53:11,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-01-31 20:53:11,908 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 20:53:11,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2022-01-31 20:53:11,909 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2022-01-31 20:53:11,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:53:11,909 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2022-01-31 20:53:11,909 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 20:53:11,909 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2022-01-31 20:53:11,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-31 20:53:11,910 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:53:11,910 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:53:11,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-31 20:53:11,910 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:53:11,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:53:11,911 INFO L85 PathProgramCache]: Analyzing trace with hash 1105142364, now seen corresponding path program 4 times [2022-01-31 20:53:11,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:53:11,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [210307585] [2022-01-31 20:53:11,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:53:11,913 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:53:11,913 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-01-31 20:53:11,913 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:53:11,914 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:53:11,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:53:12,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:53:12,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:53:12,010 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 20:53:12,011 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:53:12,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [210307585] [2022-01-31 20:53:12,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [210307585] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:53:12,011 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:53:12,011 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-31 20:53:12,011 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984586247] [2022-01-31 20:53:12,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:53:12,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 20:53:12,012 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:53:12,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 20:53:12,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-01-31 20:53:12,012 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 20:53:12,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:53:12,115 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2022-01-31 20:53:12,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 20:53:12,116 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 20:53:12,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:53:12,117 INFO L225 Difference]: With dead ends: 22 [2022-01-31 20:53:12,117 INFO L226 Difference]: Without dead ends: 17 [2022-01-31 20:53:12,119 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 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 20:53:12,123 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 20:53:12,123 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 20:53:12,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-01-31 20:53:12,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-01-31 20:53:12,127 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 20:53:12,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2022-01-31 20:53:12,127 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2022-01-31 20:53:12,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:53:12,127 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2022-01-31 20:53:12,128 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 20:53:12,128 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2022-01-31 20:53:12,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-31 20:53:12,128 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:53:12,128 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:53:12,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-31 20:53:12,128 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:53:12,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:53:12,129 INFO L85 PathProgramCache]: Analyzing trace with hash -63863818, now seen corresponding path program 5 times [2022-01-31 20:53:12,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:53:12,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [504664212] [2022-01-31 20:53:12,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:53:12,131 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:53:12,131 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-01-31 20:53:12,131 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:53:12,132 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:53:12,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:53:12,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:53:12,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:53:12,257 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 20:53:12,258 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:53:12,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [504664212] [2022-01-31 20:53:12,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [504664212] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:53:12,258 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:53:12,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-01-31 20:53:12,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077017423] [2022-01-31 20:53:12,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:53:12,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 20:53:12,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:53:12,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 20:53:12,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-01-31 20:53:12,259 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 20:53:12,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:53:12,343 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2022-01-31 20:53:12,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-31 20:53:12,344 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 20:53:12,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:53:12,346 INFO L225 Difference]: With dead ends: 23 [2022-01-31 20:53:12,346 INFO L226 Difference]: Without dead ends: 18 [2022-01-31 20:53:12,347 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 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 20:53:12,350 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 20:53:12,350 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 20:53:12,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-01-31 20:53:12,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-01-31 20:53:12,361 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 20:53:12,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2022-01-31 20:53:12,366 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2022-01-31 20:53:12,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:53:12,366 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2022-01-31 20:53:12,366 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 20:53:12,366 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2022-01-31 20:53:12,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-31 20:53:12,366 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:53:12,367 INFO L514 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:53:12,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-31 20:53:12,367 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:53:12,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:53:12,368 INFO L85 PathProgramCache]: Analyzing trace with hash -1943317092, now seen corresponding path program 6 times [2022-01-31 20:53:12,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:53:12,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1158706676] [2022-01-31 20:53:12,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:53:12,374 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:53:12,374 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-01-31 20:53:12,374 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:53:12,375 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:53:12,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:53:14,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:53:14,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:53:14,428 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 20:53:14,428 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:53:14,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1158706676] [2022-01-31 20:53:14,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1158706676] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:53:14,429 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:53:14,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-01-31 20:53:14,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988252234] [2022-01-31 20:53:14,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:53:14,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 20:53:14,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:53:14,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 20:53:14,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2022-01-31 20:53:14,430 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand has 12 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 10 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 20:53:17,885 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-31 20:53:17,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:53:17,990 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2022-01-31 20:53:17,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-31 20:53:17,991 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 10 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 20:53:17,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:53:17,991 INFO L225 Difference]: With dead ends: 24 [2022-01-31 20:53:17,991 INFO L226 Difference]: Without dead ends: 19 [2022-01-31 20:53:17,992 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2022-01-31 20:53:17,992 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 9 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 13 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-01-31 20:53:17,992 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 57 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 105 Invalid, 1 Unknown, 0 Unchecked, 3.2s Time] [2022-01-31 20:53:17,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-01-31 20:53:17,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-01-31 20:53:17,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 14 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:53:17,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2022-01-31 20:53:17,996 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2022-01-31 20:53:17,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:53:17,996 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2022-01-31 20:53:17,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 10 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 20:53:17,997 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2022-01-31 20:53:17,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-31 20:53:17,997 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:53:17,997 INFO L514 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:53:17,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-31 20:53:17,997 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:53:17,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:53:17,998 INFO L85 PathProgramCache]: Analyzing trace with hash -76826442, now seen corresponding path program 7 times [2022-01-31 20:53:17,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:53:17,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [33228800] [2022-01-31 20:53:17,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:53:17,999 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:53:17,999 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-01-31 20:53:18,000 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:53:18,001 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:53:18,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:53:18,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:53:18,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:53:18,118 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 20:53:18,118 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:53:18,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [33228800] [2022-01-31 20:53:18,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [33228800] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:53:18,119 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:53:18,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-01-31 20:53:18,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610838400] [2022-01-31 20:53:18,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:53:18,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 20:53:18,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:53:18,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 20:53:18,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-01-31 20:53:18,121 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand has 10 states, 10 states have (on average 1.4) internal successors, (14), 9 states have internal predecessors, (14), 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 20:53:18,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:53:18,211 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2022-01-31 20:53:18,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 20:53:18,211 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.4) internal successors, (14), 9 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2022-01-31 20:53:18,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:53:18,212 INFO L225 Difference]: With dead ends: 19 [2022-01-31 20:53:18,212 INFO L226 Difference]: Without dead ends: 0 [2022-01-31 20:53:18,212 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-01-31 20:53:18,213 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 1 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 20:53:18,214 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 43 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 20:53:18,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-01-31 20:53:18,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-01-31 20:53:18,214 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 20:53:18,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-01-31 20:53:18,214 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 18 [2022-01-31 20:53:18,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:53:18,215 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-01-31 20:53:18,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.4) internal successors, (14), 9 states have internal predecessors, (14), 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 20:53:18,215 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-01-31 20:53:18,215 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-01-31 20:53:18,217 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-01-31 20:53:18,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-31 20:53:18,218 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-01-31 20:53:18,703 INFO L858 garLoopResultBuilder]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2022-01-31 20:53:18,703 INFO L858 garLoopResultBuilder]: For program point reach_errorENTRY(line 3) no Hoare annotation was computed. [2022-01-31 20:53:18,704 INFO L858 garLoopResultBuilder]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2022-01-31 20:53:18,704 INFO L861 garLoopResultBuilder]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2022-01-31 20:53:18,704 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 20:53:18,704 INFO L861 garLoopResultBuilder]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2022-01-31 20:53:18,704 INFO L861 garLoopResultBuilder]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2022-01-31 20:53:18,704 INFO L861 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-01-31 20:53:18,705 INFO L861 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-01-31 20:53:18,705 INFO L861 garLoopResultBuilder]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2022-01-31 20:53:18,706 INFO L861 garLoopResultBuilder]: At program point mainENTRY(lines 12 22) the Hoare annotation is: true [2022-01-31 20:53:18,706 INFO L861 garLoopResultBuilder]: At program point mainEXIT(lines 12 22) the Hoare annotation is: true [2022-01-31 20:53:18,707 INFO L854 garLoopResultBuilder]: At program point L16-2(lines 16 19) the Hoare annotation is: (let ((.cse1 (not (= main_~y~0 (let ((.cse6 (div main_~y~0 4294967296))) (let ((.cse5 (* .cse6 (- 4294967296)))) (let ((.cse4 (div (+ main_~y~0 .cse5) 3))) (+ (* 4294967296 (div (+ main_~y~0 (* (- 3) .cse4) .cse5) 4294967296)) (* .cse6 4294967296) (* 3 .cse4))))))))) (or (and (<= 5 main_~x~0) (<= main_~x~0 5) (let ((.cse0 (* 715827883 main_~y~0))) (<= (* (div (+ 2863311519 .cse0) 2147483648) 2147483648) (+ .cse0 715827872)))) (and (<= (+ (* 89478485 main_~y~0) (* (div (+ (* (- 89478485) main_~y~0) 357913939) 268435456) 268435456)) 89478484) (<= 2 main_~x~0) (<= main_~x~0 2)) (and (<= 6 main_~x~0) (<= (div main_~x~0 4294967296) 0) .cse1) (and (= main_~x~0 0) (= main_~y~0 1)) (and (let ((.cse2 (* main_~y~0 178956971))) (<= (* (div (+ 715827879 .cse2) 536870912) 536870912) (+ .cse2 178956968))) (<= main_~x~0 3) (<= 3 main_~x~0)) (and (<= 1 main_~x~0) .cse1 (let ((.cse3 (* 44739243 main_~y~0))) (<= (* (div (+ .cse3 178956969) 134217728) 134217728) (+ .cse3 44739242))) (<= main_~x~0 1)) (and (<= main_~x~0 4) (<= (+ (* 1073741824 (div (+ (* main_~y~0 (- 357913941)) 1431655759) 1073741824)) (* main_~y~0 357913941)) 357913936) (<= 4 main_~x~0)))) [2022-01-31 20:53:18,708 INFO L854 garLoopResultBuilder]: At program point L16-3(lines 16 19) the Hoare annotation is: (not (= main_~y~0 (let ((.cse2 (div main_~y~0 4294967296))) (let ((.cse1 (* .cse2 (- 4294967296)))) (let ((.cse0 (div (+ main_~y~0 .cse1) 3))) (+ (* 4294967296 (div (+ main_~y~0 (* (- 3) .cse0) .cse1) 4294967296)) (* .cse2 4294967296) (* 3 .cse0))))))) [2022-01-31 20:53:18,708 INFO L861 garLoopResultBuilder]: At program point mainFINAL(lines 12 22) the Hoare annotation is: true [2022-01-31 20:53:18,708 INFO L861 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 5 10) the Hoare annotation is: true [2022-01-31 20:53:18,708 INFO L861 garLoopResultBuilder]: At program point __VERIFIER_assertEXIT(lines 5 10) the Hoare annotation is: true [2022-01-31 20:53:18,708 INFO L854 garLoopResultBuilder]: At program point L7(line 7) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2022-01-31 20:53:18,708 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 20:53:18,708 INFO L861 garLoopResultBuilder]: At program point L6-2(lines 5 10) the Hoare annotation is: true [2022-01-31 20:53:18,708 INFO L854 garLoopResultBuilder]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 7) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2022-01-31 20:53:18,713 INFO L732 BasicCegarLoop]: Path program histogram: [7, 1, 1] [2022-01-31 20:53:18,714 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-01-31 20:53:18,737 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 08:53:18 BoogieIcfgContainer [2022-01-31 20:53:18,738 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-31 20:53:18,739 INFO L158 Benchmark]: Toolchain (without parser) took 8325.10ms. Allocated memory was 221.2MB in the beginning and 274.7MB in the end (delta: 53.5MB). Free memory was 178.0MB in the beginning and 167.6MB in the end (delta: 10.4MB). Peak memory consumption was 65.4MB. Max. memory is 8.0GB. [2022-01-31 20:53:18,739 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 221.2MB. Free memory is still 194.2MB. There was no memory consumed. Max. memory is 8.0GB. [2022-01-31 20:53:18,740 INFO L158 Benchmark]: CACSL2BoogieTranslator took 222.98ms. Allocated memory is still 221.2MB. Free memory was 177.8MB in the beginning and 199.9MB in the end (delta: -22.2MB). Peak memory consumption was 10.0MB. Max. memory is 8.0GB. [2022-01-31 20:53:18,741 INFO L158 Benchmark]: Boogie Preprocessor took 27.04ms. Allocated memory is still 221.2MB. Free memory was 199.9MB in the beginning and 198.4MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-01-31 20:53:18,742 INFO L158 Benchmark]: RCFGBuilder took 223.27ms. Allocated memory is still 221.2MB. Free memory was 198.4MB in the beginning and 188.9MB in the end (delta: 9.4MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-01-31 20:53:18,742 INFO L158 Benchmark]: TraceAbstraction took 7846.80ms. Allocated memory was 221.2MB in the beginning and 274.7MB in the end (delta: 53.5MB). Free memory was 188.4MB in the beginning and 167.6MB in the end (delta: 20.9MB). Peak memory consumption was 75.4MB. Max. memory is 8.0GB. [2022-01-31 20:53:18,743 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 221.2MB. Free memory is still 194.2MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 222.98ms. Allocated memory is still 221.2MB. Free memory was 177.8MB in the beginning and 199.9MB in the end (delta: -22.2MB). Peak memory consumption was 10.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 27.04ms. Allocated memory is still 221.2MB. Free memory was 199.9MB in the beginning and 198.4MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 223.27ms. Allocated memory is still 221.2MB. Free memory was 198.4MB in the beginning and 188.9MB in the end (delta: 9.4MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * TraceAbstraction took 7846.80ms. Allocated memory was 221.2MB in the beginning and 274.7MB in the end (delta: 53.5MB). Free memory was 188.4MB in the beginning and 167.6MB in the end (delta: 20.9MB). Peak memory consumption was 75.4MB. 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: 7.8s, OverallIterations: 9, TraceHistogramMax: 7, PathProgramHistogramMax: 7, EmptinessCheckTime: 0.0s, AutomataDifference: 4.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.5s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 1 mSolverCounterUnknown, 56 SdHoareTripleChecker+Valid, 3.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 55 mSDsluCounter, 263 SdHoareTripleChecker+Invalid, 3.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 164 mSDsCounter, 70 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 305 IncrementalHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 70 mSolverCounterUnsat, 99 mSDtfsCounter, 305 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 110 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 2.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=19occurred in iteration=8, InterpolantAutomatonStates: 64, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 9 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 18 LocationsWithAnnotation, 66 PreInvPairs, 94 NumberOfFragments, 286 HoareAnnotationTreeSize, 66 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 18 FomulaSimplificationsInter, 47 FormulaSimplificationTreeSizeReductionInter, 0.5s 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: (((((((5 <= x && x <= 5) && (2863311519 + 715827883 * y) / 2147483648 * 2147483648 <= 715827883 * y + 715827872) || ((89478485 * y + (-89478485 * y + 357913939) / 268435456 * 268435456 <= 89478484 && 2 <= x) && x <= 2)) || ((6 <= x && x / 4294967296 <= 0) && !(y == 4294967296 * ((y + -3 * ((y + y / 4294967296 * -4294967296) / 3) + y / 4294967296 * -4294967296) / 4294967296) + y / 4294967296 * 4294967296 + 3 * ((y + y / 4294967296 * -4294967296) / 3)))) || (x == 0 && y == 1)) || (((715827879 + y * 178956971) / 536870912 * 536870912 <= y * 178956971 + 178956968 && x <= 3) && 3 <= x)) || (((1 <= x && !(y == 4294967296 * ((y + -3 * ((y + y / 4294967296 * -4294967296) / 3) + y / 4294967296 * -4294967296) / 4294967296) + y / 4294967296 * 4294967296 + 3 * ((y + y / 4294967296 * -4294967296) / 3))) && (44739243 * y + 178956969) / 134217728 * 134217728 <= 44739243 * y + 44739242) && x <= 1)) || ((x <= 4 && 1073741824 * ((y * -357913941 + 1431655759) / 1073741824) + y * 357913941 <= 357913936) && 4 <= x) - 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 20:53:18,768 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...